All Free Online Calculators

Free basic online calculator. Add, subtract, multiply, and divide with ease. Simple and fast.

Free online engineering calculator with sin, cos, tan, log, ln, powers, roots, factorials, memory and more. Supports DEG/RAD mode.

Calculate the square root of any number instantly. Free online square root (√) calculator.

Calculate squares (x²), cubes (x³), and any power (xⁿ). Includes a perfect squares table from 1 to 20. Free online square calculator.

Calculate factorial (n!) instantly. Includes a factorial table from 0! to 20!. Free online factorial calculator.

Find the nth Fibonacci number or list the Fibonacci sequence. Free online Fibonacci sequence calculator.

Calculate the area of circles, rectangles, triangles, trapezoids, and parallelograms. Free online area calculator with formulas.

Calculate the volume of cubes, cuboids, spheres, cylinders, and cones. Free online volume calculator with formulas.

Calculate the remainder and quotient of any division. Free online modulo (mod) calculator.

Find the nth term and sum of an arithmetic sequence. Free online arithmetic sequence calculator with sequence display.

Find the nth term and sum of a geometric sequence. Free online geometric sequence calculator with sequence display.

Convert angles between degrees (°), radians (rad), and gradians (grad). Free online angle converter.

Convert numbers between binary (2), octal (8), decimal (10), and hexadecimal (16). Free online number base converter.

Calculate percentages easily. Find what percent of a number is, percent increase/decrease, and more.

Convert between decimal and binary numbers instantly. Free online binary converter and calculator.

Calculate powers and exponents. Includes powers of 2 table. Free online power (exponent) calculator.

Calculate real estate investment yield: gross and net rental return from purchase price, annual rent, and ownership costs.

Convert kilograms to pounds, grams, ounces, and stone. Also converts pounds to kg instantly.

Add, subtract, multiply and divide fractions and mixed numbers. Simplifies results automatically. Free.

Calculate the Greatest Common Divisor (GCD) and Least Common Multiple (LCM) of two or more numbers. Free.

Calculate mean, median, mode, standard deviation, variance, and more. Free online statistics calculator.

Free online quadratic equation solver. Find real and complex roots of ax² + bx + c = 0 using the quadratic formula. Shows discriminant and step-by-step results.

Free online logarithm calculator. Compute log base 10 (log₁₀), natural log (ln), log base 2, and any custom base logarithm instantly.

Free online trigonometry calculator. Compute sin, cos, tan, arcsin, arccos, arctan in degrees or radians instantly.

Free online permutation and combination calculator. Compute nPr (permutations), nCr (combinations), and factorials instantly.

Free online prime factorization calculator. Find prime factors, factor tree, exponent form, and all divisors of any number up to 10 million.

Free online ratio calculator. Solve for missing values in A:B = C:D proportions, simplify ratios, and find equivalent ratios instantly.

Free online matrix calculator. Perform 2×2 and 3×3 matrix addition, subtraction, multiplication, determinant, and transpose operations.

Free online average calculator. Compute arithmetic mean, median, mode, weighted average, geometric mean, harmonic mean and more.

Calculate the sides of a right triangle using the Pythagorean theorem. Enter any two sides to find the third.

Convert numbers to and from scientific notation. Perform arithmetic in scientific notation format.

Calculate percent error between experimental and theoretical values. Essential for science and math students.

Calculate speed, distance, or time using the fundamental physics formula. Enter any two values to find the third.

Calculate density, mass, or volume. Enter any two values to find the third using the density formula (D = M/V).

Calculate the slope, distance, and equation of a line between two points. Uses the slope formula m=(y2-y1)/(x2-x1).

Round numbers to any decimal place. Round up, down, or to nearest value. Supports rounding to significant figures.

Convert numbers to Roman numerals and vice versa. Easy online Roman numeral converter with full chart.

Round numbers to a given number of significant figures. Perfect for chemistry, physics, and science calculations.

Calculate percentage change between two values. Find percentage increase, decrease, or difference quickly.

Calculate the derivative of any polynomial f(x) step by step. Enter a polynomial like 3x³−2x²+5x−7 and get f'(x) instantly. Free online calculus tool.

Calculate definite integrals of common functions (xⁿ, sin, cos, eˣ, ln) using numerical integration. Free online calculus tool.

Calculate circle area and circumference using π to 5, 10, 15, or 20 decimal places. See how π precision affects results with side-by-side comparison.

Calculate all sides, angles, area, and perimeter of any triangle. Supports SSS, SAS, AAS, and ASA input methods using the law of cosines and law of sines.

Calculate mean, median, mode, range, population and sample variance, and standard deviation for any list of numbers. Includes step-by-step formula breakdown.

Calculate Z-scores and percentiles instantly. Convert a value to a Z-score using mean and standard deviation, or convert a Z-score to its percentile rank.

Calculate simple probability, AND/OR probability for independent or dependent events, and conditional probability P(A|B). Includes complement, fraction, decimal, and percent output.

Calculate sphere volume, surface area, and great circle circumference from radius or diameter. Compare results using π to 5, 10, 15, or 20 decimal places.

Calculate cylinder volume, total surface area, lateral surface area, and base area from radius and height. Compare results using π to 5, 10, 15, or 20 decimal places.

Calculate cone volume, total surface area, lateral surface area, base area, and slant height from radius and height. Compare results using π to 5, 10, 15, or 20 decimal places.

Calculate the cube root (∛n) or any nth root of any number. Supports negative cube roots. Choose decimal precision from 5 to 20 places. Instant verification included.

Solve linear equations (ax + b = c) and systems of 2 linear equations step by step. Handles no solution and infinite solutions cases. Free online math solver.

Calculate confidence intervals using Z-distribution (σ known) or t-distribution (σ unknown). Supports 90%, 95%, and 99% confidence levels with margin of error and critical value reference table.

Calculate the area of a circle from its radius or diameter. Free online circle area calculator using the formula A = π × r².

Calculate the area of a rectangle by entering width and height. Free online rectangle area calculator with the formula A = w × h.

Calculate the area of a triangle from base and height. Free online triangle area calculator with the formula A = (a × h) / 2.

Calculate the area of a trapezoid from parallel bases and height. Free online trapezoid area calculator with the formula A = (a + b) × h / 2.

Calculate the area of a parallelogram from base and height. Free online parallelogram area calculator with the formula A = a × h.

Calculate the area of a rectangle or quadrilateral by entering width and height. Free online area calculator with the formula A = w × h.

Generate random numbers between any min and max. Choose count, allow or exclude duplicates. Free online random number generator.

Perform addition, subtraction, multiplication, division and bitwise operations (AND, OR, XOR, NOT) on hexadecimal numbers. Free online hex calculator.

Calculate remaining quantity after radioactive decay using half-life formula. Find elapsed time or half-life from initial and remaining amounts. Free online calculator.

Calculate population variance, sample variance, standard deviation, mean, and range from a data set. Supports comma-separated or line-by-line input. Free online.

Paste numbers separated by spaces, commas, tabs, or newlines. Instantly get count, sum, mean, median, mode, min, max, range, variance, and standard deviation.

Calculate monthly loan payments, total interest, and repayment schedule for equal-payment or equal-principal loans.

Estimate your net take-home salary after tax for 10 countries. US, UK, Germany, France, Canada, Australia, Japan, Korea, India, Brazil.

Convert currencies with live exchange rates from the European Central Bank. 30+ currencies. Free online currency calculator.

Calculate compound interest with daily, monthly, quarterly, or annual compounding. Includes year-by-year growth table. Free online investment calculator.

Calculate tip amount, total bill, and split among any number of people. Fast and free.

Calculate discounted price, amount saved, and final price after any percentage off. Free and instant.

Calculate monthly loan payments, total interest, and total cost for any loan. Free online loan payment calculator.

Calculate how inflation affects purchasing power over time. Enter an amount, start year, end year, and inflation rate to see future or past equivalent values.

Calculate return on investment (ROI) percentage, net profit, and annualized ROI. Perfect for comparing investment performance.

Estimate Korean severance pay from average daily wages and years of service. Free online retirement pay calculator.

Estimate Korean health insurance and long-term care premiums for employees and the self-employed from monthly income.

Estimate Korean National Pension contributions and projected monthly benefits based on income and insured period.

Score your subscriptions by comparing monthly cost, usage frequency, and satisfaction to identify better value services.

Estimate Korean unemployment benefits from average daily wages, age group, and employment insurance contribution period.

Estimate retirement pension growth from salary, contribution rate, years of service, and expected investment returns.

Calculate stock profit, return on investment, fees, tax, and break-even price for domestic or overseas stock trades.

Find out if your salary has kept up with inflation. Calculate the real purchasing power of your current pay vs. when you started.

Calculate how much money you spend on coffee over time and what you could have bought or invested instead. Compound interest included.

Calculate the cost per hour or episode of your streaming subscriptions. Compare to a cinema ticket to see if you're getting value.

See how much your money would grow if you invested monthly instead of spending. S&P 500, bonds, and custom rates supported.

Convert any item's price into hours (or months) of work based on your salary. See the true cost of luxury goods in time.

Calculate the real salary cost of any meeting. Enter attendees, average salary, and duration to see the true dollar cost of your next meeting.

Calculate the true lifetime financial cost of smoking plus the investment opportunity cost. See what you'd have if you invested instead.

Estimate how many years it takes to afford a Korean apartment based on apartment price, salary, and savings rate.

See how Korean military pay could grow if invested during and after service with compound interest over time.

Compare spending your wedding budget with investing it to see the long-term future value of that money.

Calculate your annual delivery spending and see how much delivery fees could grow if invested instead.

Calculate Korean weekly holiday pay (주휴수당) and total weekly wages from hourly pay and weekly work hours.

Estimate Korean employee deductions for national pension, health insurance, long-term care, and employment insurance.

Calculate simple interest quickly. Enter principal, rate, and time to get interest earned and total amount.

Calculate how much your savings will grow over time with regular contributions and compound interest.

Calculate the present value of a future sum of money. Essential for investment decisions and financial planning.

Calculate the future value of an investment or savings. See how your money grows over time with compound interest.

Calculate sales commission quickly. Enter sale amount and commission rate to get your commission earnings.

Calculate your loan amortization schedule. See monthly payments, interest paid, and principal balance over time.

Calculate Annual Percentage Yield (APY) from interest rate and compounding frequency. Compare savings accounts and investments.

Calculate the Compound Annual Growth Rate (CAGR) of an investment. Compare investment performance over time.

Calculate your monthly car loan payment, total interest, and total cost. Plan your auto financing.

Convert your hourly wage to annual salary, monthly, and weekly income. See your full-year earnings.

Calculate your overtime pay based on hourly rate and hours worked. Includes time and a half, double time calculations.

Calculate your new salary after a pay raise. See the dollar increase, percentage change, and new annual income.

Calculate gross profit margin, markup, and revenue. Essential for pricing products and business planning.

Calculate how long to pay off a loan with extra payments. See how much interest you save by paying extra.

Calculate how long it will take to reach your savings goal. Find out how much to save each month.

Calculate the average cost of stocks when buying at different prices. Find your break-even price.

Calculate the interest rate on a loan or investment. Enter principal, payment, and term to find the rate.

Calculate your break-even point in units and revenue. Enter fixed costs, variable costs, and selling price. Free online business calculator.

Calculate your monthly EPF contributions (employee + employer) and estimate your provident fund corpus at 8.5% annual interest over any period.

Calculate the estimated future value of your SIP investments. Enter monthly SIP amount, expected return rate (8–15%), and duration to see your potential wealth.

Calculate BPJS Kesehatan and BPJS Ketenagakerjaan (JHT, JP) contributions for employees and employers. Get your estimated net salary after all deductions.

Calculate take-home pay based on Indonesia minimum wage (UMR/UMP) 2024 for Jakarta, Jawa, Bali, and other regions. Includes BPJS and PPh 21 deductions.

Estimate regular FGTS employer deposits at 8%, including the 13th salary. See monthly, annual, and multi-year deposits without an unreliable yield forecast.

Estimate 2026 Brazilian CLT take-home pay using official INSS brackets, the IRPF table and income reduction, dependents, other discounts, and employer FGTS.

Calculate net take-home pay and employer costs based on Turkey 2024 minimum wage (₺17,002.12 gross/month). Includes SGK, unemployment insurance, and stamp tax.

Calculate Vietnam social insurance (BHXH), health insurance (BHYT), and unemployment insurance (BHTN) contributions for employees and employers in 2024.

Calculate net take-home pay based on Vietnam regional minimum wage 2024. Region 1 (HCM/Hanoi): ₫4,960,000/month. Includes BHXH and PIT deductions.

Find out how long it takes to pay off your credit card balance. Compare minimum payments vs fixed payments and see how much interest you save.

Project your retirement nest egg based on age, savings, and return rate. See estimated monthly income and whether you're on track for retirement.

Calculate the future value of your investment with compound interest. Supports monthly contributions and multiple compounding frequencies.

Plan your monthly budget by entering income and expense categories. See your surplus or deficit and compare against the 50/30/20 budgeting rule.

Calculate how long it takes to pay off multiple debts. Compare the debt snowball and avalanche strategies to find the best approach for saving time and interest.

Calculate Islamic Zakat 2.5% on savings, gold, silver, and trade goods. Check nisab threshold (85g gold / 595g silver) and see how much you owe.

Calculate Malaysia EPF (KWSP) contributions for employee and employer, plus SOCSO (PERKESO) and EIS (SIP). 2024 rates. Includes age-based rate changes at 56 and 60.

Calculate your total net worth by entering your assets and liabilities. See exactly where you stand financially with this free net worth calculator.

Calculate your debt-to-income (DTI) ratio instantly. Lenders use DTI to assess loan eligibility — keep yours under 43% for best mortgage rates.

Calculate your monthly car lease payment. Enter vehicle price, residual value, money factor, and term to estimate your lease cost.

Find your US federal income tax bracket and marginal tax rate. Enter your taxable income to see which bracket you fall in for 2024.

Estimate your monthly Social Security retirement benefits based on your age and earnings history. Plan your retirement income with this free calculator.

Calculate your Required Minimum Distribution (RMD) from your IRA or 401(k). Enter your account balance and age to find your annual withdrawal amount.

Calculate your take-home pay after federal taxes, state taxes, and deductions. Enter your gross salary or hourly wage to estimate your net paycheck.

Calculate the ideal freelance hourly or project rate based on your desired income, expenses, billable hours, and profit margin.

Calculate how much your 401(k) will grow by retirement. Enter your current balance, contribution, employer match, and expected return rate.

Calculate the interest earned on a Certificate of Deposit (CD). Enter deposit amount, APY, and term to see your maturity value and total interest.

Calculate monthly payments, total interest, and total cost for a business loan. Enter loan amount, interest rate, and term to plan your financing.

Calculate project profit, net margin, and ROI from revenue and costs. Track multiple cost items to find your true project profitability.

Calculate the total VAT-inclusive price from a pre-tax supply amount using Korea's standard 10% VAT or a custom rate.

Extract the pre-tax supply price and VAT amount from a VAT-inclusive total using Korea's 10% rate or a custom rate.

Calculate supply price, VAT, and VAT-inclusive totals by adding or reverse-calculating Korea's standard 10% VAT rate.

Calculate Korean VAT at 10% or a custom rate. Get supply price, VAT amount, and VAT-inclusive totals instantly.

Estimate your Korean year-end tax refund or additional payment from salary, withholding, and deduction amounts.

Estimate Korean gift tax after relationship-based exemptions and progressive tax brackets.

Estimate Korean annual vehicle tax from engine displacement, vehicle type, and age-based reduction rates.

Estimate Korean income tax and local income tax from salary or taxable income using 2024 progressive tax brackets.

Estimate Korean capital gains tax on real estate or stocks from purchase price, sale price, and necessary expenses.

Estimate Korean inheritance tax after deducting debts, funeral expenses, basic deductions, and spouse deductions.

Estimate Korean comprehensive income tax from business, freelance, rental income, or combined income sources.

Calculate GST (Goods and Services Tax) for any amount. Supports all Indian GST rates: 0%, 5%, 12%, 18%, 28%. Get CGST, SGST, and IGST breakdowns instantly.

Calculate your Indian income tax and monthly TDS under the New Regime (2024) or Old Regime. Includes surcharge, health & education cess for all age groups.

Calculate your HRA exemption from income tax. Supports metro and non-metro cities. Know exactly how much of your HRA is tax-free vs taxable.

Calculate Indonesian PPh 21 income tax for employees. Enter gross salary and PTKP status to get annual tax and monthly deduction. Updated for 2024 rates.

Calculate Indonesian PPN (Pajak Pertambahan Nilai) for any amount. Supports 1%, 5%, 11%, and 12% rates. Add or extract VAT from prices.

Estimate 2026 Brazilian annual IRPF with official brackets, legal or simplified deductions, and the new reduction for taxable income up to R$88,200.

Calculate the 2026 employee INSS contribution with official progressive rates from 7.5% to 14% and the R$8,475.55 contribution ceiling.

Calculate Turkish KDV (Katma Değer Vergisi) for any amount. Supports 1%, 10%, and 20% rates. Standard rate raised to 20% in July 2023. Add or extract VAT.

Calculate Turkish annual income tax (Gelir Vergisi) 2024. Rates: 15% up to ₺110K, 20% up to ₺230K, 27% up to ₺580K, 35% up to ₺3M, 40% above ₺3M.

Calculate Vietnam Personal Income Tax (Thuế Thu Nhập Cá Nhân) 2024. Supports progressive rates 5%–35%, personal deduction ₫11M/month, dependent deductions.

Calculate Vietnam Value Added Tax (Thuế Giá Trị Gia Tăng). Supports 0%, 5%, 8%, and 10% rates. Add or extract VAT from any price instantly.

Calculate Ukraine unified social contribution (ESV/ЄСВ) 22%. Shows minimum base 8,000 UAH, monthly and annual ESV for FOP and employees.

Calculate Ukraine personal income tax (PDFO) 18% plus military levy (VZ) 1.5% = 19.5% total. See gross-to-net salary instantly.

Calculate Ukraine PDV (ПДВ / VAT). Standard 20%, agricultural 14%, medicine 7%, exports 0%. Add or extract VAT from any amount.

Calculate Iranian salary income tax 1403 (2024). Progressive brackets: 72M Tomans exempt, then 10%→25%. Shows annual and monthly net income.

Estimate 2026 Japanese employee take-home pay using the ¥690,000 minimum employment-income deduction, 2026 income-tax deductions, resident tax, and Tokyo Kyokai Kenpo FY2026 social-insurance rates.

Estimate your 2026 Furusato Nozei (ふるさと納税) donation limit using the MIC special-deduction cap formula, the ¥690,000 minimum employment-income deduction, 2026 deductions, and Tokyo FY2026 social insurance.

Estimate German net salary using the 2026 income-tax tariff, solidarity surcharge and social-insurance rates for tax classes I–VI.

Calculate 2026 German health, pension, unemployment and care insurance for employee and employer, with official contribution ceilings.

Calculate Malaysian personal income tax (LHDN) 2024 on chargeable income. Progressive rates 0–30% across 10 brackets. See tax payable and effective rate instantly.

Calculate China 2024 individual income tax (IIT / 个人所得税) using the cumulative withholding method. Includes Beijing 五险一金 social insurance deductions and 专项附加扣除 additional deductions.

Calculate China 2024 五险一金 (wuxian yijin) contributions: pension, medical, unemployment, work injury, maternity, and housing provident fund. Shows both employee and employer shares for Beijing.

Calculate Philippine 2024 income tax under the TRAIN Law (RA 10963). 6-bracket annual table with SSS, PhilHealth, and Pag-IBIG deductions. Monthly withholding tax shown.

Calculate 2024 Philippine mandatory contributions: SSS (employee 4.5%, employer 9.5%, MSC cap ₱30,000), PhilHealth (5%, ₱100k ceiling), and Pag-IBIG (2% each, ₱200 cap).

Calculate Mexico 2024 ISR income tax using the SAT annual tariff table. 11 progressive brackets, IMSS employee contributions, and employment subsidy (subsidio al empleo) included.

Calculate Colombia 2024 payroll costs: employee Salud 4% + Pension 4%, employer contributions 8.5%/12%/ARL, and mandatory prestaciones sociales (prima, cesantias, vacaciones). SMLMV $1,300,000.

Calculate UAE end of service gratuity under UAE Labour Law Art.51 (Decree-Law 33/2021): 21 days/year for up to 5 years, 30 days/year beyond 5 years. Resignation reductions abolished — all reasons give full entitlement after 1 year. 24-month cap applies.

Calculate Saudi GOSI contributions: Saudi employees pay 9.75% (Pension 9% + SANED 0.75%) + employer 11.75% (Pension 9% + Hazards 2% + SANED 0.75%); expat employer only 2%. Ceiling SAR 45,000/month.

Calculate Egypt 2024 income tax: 6 brackets 0%–27.5%, personal exemption EGP 15,000. Includes NSSF employee 11% and employer 18.75% social insurance contributions.

Calculate Russia 2026 NDFL for the main tax base with progressive rates of 13/15/18/20/22% and child deductions up to the 450,000 RUB threshold.

Estimate Russia 2026 IP USN at 6% of revenue or 15% of profit (minimum 1%), including 57,390 RUB fixed and additional 1% contributions. VAT excluded.

Calculate Italy 2024 IRPEF: 3 brackets 23/35/43%. Employment detrazione (Art.13 TUIR, 2024 reform): 1,955€ (≤15k), 1,910€ flat (15k–28k), then reducing to 0 by 50k. INPS 9.49% deducted before IRPEF.

Calculate Italy 2024 INPS contributions: employee 9.49% (IVS 9.19% + DS 0.30%), employer ~29.40%. Ceiling EUR 119,650/year. Covers all main INPS branches (IVS, CIGS, maternita, INAIL).

Calculate Pakistan FBR income tax 2024-25 under Section 149: 6 salary slabs from 0% to 35% (up to PKR 600,000 exempt, over PKR 4,100,000 at 35%). Monthly withholding view included.

Calculate Zakat using the silver nisab method: 612.36g (52.5 tola) of silver. Enter your silver price in PKR/gram and asset breakdown to find your annual Zakat at 2.5%.

Calculate your Body Mass Index (BMI) instantly. Supports metric (cm/kg) and imperial (ft/lb). WHO weight category included.

Calculate your BMR and Total Daily Energy Expenditure (TDEE) using the Mifflin-St Jeor formula. Get calorie targets for weight loss, maintenance, and gain.

Calculate your estimated due date, conception date, gestational age, and key pregnancy milestones from your last menstrual period (LMP) or conception date.

Calculate your ideal body weight based on height and gender using multiple formulas. Free online.

Calculate your daily water intake based on body weight and activity level. Free hydration calculator.

Calculate your daily macronutrient goals (protein, carbohydrates, fat) for weight loss, gain, or maintenance.

Find your ideal bedtime or wake-up time based on 90-minute sleep cycles. Free online sleep cycle calculator.

Calculate your body fat percentage using the US Navy method. Enter height, neck, waist, and hips. Free online.

Calculate your Basal Metabolic Rate (BMR) using the Mifflin-St Jeor equation. Find how many calories you burn at rest.

Calculate running pace, speed, and finish time. Enter any two values to find the third. Perfect for runners and cyclists.

Estimate your Blood Alcohol Content (BAC) based on drinks consumed, weight, gender, and time. Educational purposes only.

Calculate your ovulation date and fertile window based on your last period. Find your best days to conceive.

Convert steps to miles and kilometers. Calculate how far you walked based on step count and stride length.

Calculate your Waist-to-Hip Ratio (WHR) and assess your health risk. Enter waist and hip measurements.

Calculate how long you have been sober. Track your sobriety milestone in days, weeks, months, and years.

Convert kilojoules to calories (kcal) and vice versa. Quick kJ to Cal conversion for food and nutrition labels.

Calculate calories burned during exercise based on activity type, duration, weight, and intensity. Covers 30+ exercises including running, cycling, and swimming.

Calculate calories burned walking based on distance, speed, weight, and terrain. Get accurate results for treadmill or outdoor walking.

Enter your systolic and diastolic blood pressure readings to see your BP category (normal, elevated, hypertension stage 1 or 2) per AHA guidelines.

Calculate your maximum heart rate, resting HR, and target heart rate zones for fat burn, cardio, and peak training based on age.

Calculate the daily calorie deficit needed to reach your weight loss goal. Enter your stats, activity level, and target weight to get your custom plan.

Calculate how many weeks pregnant you are from your last menstrual period (LMP) or conception date. See your trimester and estimated due date.

Free online unit converter. Convert length, weight, temperature, speed, area, and volume between metric and imperial units.

Find the exact calendar-day difference between two dates, including weeks, weekdays, weekends, and an anchored years–months–days breakdown.

Calculate total work hours and minutes from start and end times including breaks. Free timesheet calculator.

Estimate your electricity bill from monthly power usage in kWh with tiered progressive rate calculations.

Calculate fuel cost for any trip. Enter distance, fuel efficiency, and price per liter or gallon. Free online.

Split any bill equally or by item among friends. Add multiple items and people for a fair split. Free online.

Free online length converter. Convert meters, feet, inches, centimeters, kilometers, miles, yards and more instantly.

Free online temperature converter. Convert Celsius to Fahrenheit, Fahrenheit to Celsius, and Kelvin instantly.

Free online weight converter and weight conversion calculator. Convert weight between kg, lbs, oz, grams, metric tons, stones and more instantly.

Free online volume converter. Convert liters, gallons, milliliters, cups, teaspoons, tablespoons, pints and more.

Free online area converter. Convert square meters, square feet, acres, hectares, square kilometers and more.

Free online speed converter. Convert km/h, mph, m/s, knots, Mach and ft/s instantly.

Free online data storage converter. Convert gigabytes, megabytes, terabytes, bits, bytes, KB, GB, TB and more.

Free online cooking converter. Convert cups, tablespoons, teaspoons, fluid ounces, milliliters, pints and gallons.

Calculate the total years of life and salary value lost to commuting. Enter your daily commute time and career years to see the shocking true cost.

Calculate your cumulative sleep debt and see how long it will take to recover your cognitive performance.

Count characters, words, and bytes in your text instantly. Free character counter with and without spaces.

Generate strong, secure random passwords instantly. Customize length, include uppercase, numbers, and symbols. Nothing is sent to a server.

Create a QR code from any text or URL instantly and download it as a PNG. Free, fast, and works entirely in your browser.

Calculate your GPA (Grade Point Average) easily. Enter your grades and credit hours to get your cumulative GPA.

Calculate the wind chill factor and feel-like temperature. Enter air temperature and wind speed.

Calculate the heat index (feels-like temperature) based on temperature and humidity. Stay safe in hot weather.

Calculate your final grade based on assignments, tests, and exams. Find out what grade you need to pass.

Count the number of days between two dates or from today. Business days option included.

Calculate square footage of rooms, floors, or outdoor spaces. Supports rectangles, circles, triangles, and more.

Calculate the age difference between two people. Enter two birth dates to find the exact age gap in years, months, and days.

Add or subtract a whole number of days or weeks from today or any date. See the resulting date and weekday; zero days is valid.

Calculate volume in cubic feet. Enter length, width, and height to get cubic feet. Supports multiple units.

Find out what generation you belong to based on your birth year. Baby Boomer, Gen X, Millennial, Gen Z, or Gen Alpha?

Convert between energy units: joules, kilojoules, calories, kilocalories, kilowatt-hours, BTU, and more.

Convert between pressure units: PSI, bar, pascal, atmosphere, kilopascal, and more. Fast and accurate.

Convert between time units: seconds, minutes, hours, days, weeks, months, and years. Fast and accurate.

Convert grams to cups for cooking and baking. Supports flour, sugar, butter, rice, and many more ingredients.

Convert kilograms to pounds (lbs) quickly and accurately. Includes kg to lbs formula and conversion table.

Convert feet to meters and meters to feet. Includes feet and inches to meters conversion.

Convert centimeters to inches and inches to centimeters. Essential for height conversions and measurements.

Convert millimeters to inches and inches to millimeters. Quick mm to inches conversion for engineering and daily use.

Convert square feet to acres and acres to square feet. Instant area unit conversion.

Convert square meters to square feet and square feet to square meters. Instant area conversion.

Add or subtract time values (hours, minutes, seconds). Also sum multiple durations. Free online time calculator.

Calculate subnet mask, network address, broadcast address, host range and total hosts from an IP address and CIDR prefix. Free online subnet calculator.

Calculate voltage (V), current (I), resistance (R), or power (P) using Ohm's Law (V=IR). Enter any two values to find the other two. Free online electronics tool.

Calculate how many liters or gallons of paint you need for a room. Enter room dimensions and number of coats. Free online paint coverage calculator.

Calculate concrete volume in cubic yards or cubic meters for slabs, footings, and columns. Find how many bags of concrete you need. Free online tool.

Convert between standard 12-hour (AM/PM) and military 24-hour time format instantly. Includes a full military time conversion chart. Free online tool.

Convert dates between Solar Hijri (Shamsi/Jalali) and Gregorian calendar. Supports all Persian months. Used in Iran and Afghanistan.

Calculate Korean man-nai, traditional Korean age, lived days, zodiac sign, and your next birthday countdown.

Calculate your exact age in years, months and days from your date of birth. Includes next birthday countdown.

Count days until or since any target date. Set multiple D-Day events and track countdowns together.

Calculate how many times you will see your parents again based on their age and how often you meet. A heartfelt reality check.

Calculate how many years of your life you've spent on social media, YouTube, and screens. See what you could have done instead.

Calculate how many summers you have left with your child before they leave home. A number that will change how you spend every summer.

Calculate how many times you will realistically see your best friend again based on age and meeting frequency. The answer will surprise you.

Calculate how many meals you have left in your life based on your age and life expectancy. 80,000 meals in a lifetime — how many are yours?

Calculate how many heartbeats you have left based on your age, life expectancy, and resting heart rate. 2.5 billion in a lifetime — how many are yours?

Calculate the total lifetime hours and years you will spend on your phone based on daily pickups and usage.

See how many Korean fried chickens your monthly salary can buy and compare purchasing power over time.

Generate secure random Powerball, Mega Millions, or custom lottery number sets using current US game formats. No prediction claims.

Calculate your weighted GPA including AP, IB, and honors courses. Enter your grades and course weights to see your true academic standing.

Plan your wedding budget by category: venue, catering, photography, flowers, and more. See totals, percentages, and what you can afford.

Estimate the total cost of a 4-year college education including tuition, room, board, and fees. Account for financial aid and annual cost increases.

Estimate monthly and annual nursing home costs by care type: independent living, assisted living, memory care, or skilled nursing facility.

Estimate monthly child support payments based on both parents' incomes, number of children, and custody arrangement. General estimate for planning purposes.

Convert Korean pyeong to square meters and square feet, or convert m² back to 평 for apartment and real estate sizes.

Convert Korean jeonse deposits to equivalent monthly rent or monthly rent to jeonse using a customizable annual conversion rate.

Calculate the monthly rent equivalent of a Korean jeonse deposit, or estimate the deposit from monthly rent and conversion rate.

Calculate monthly mortgage payments, total interest, and view an amortization schedule. Supports extra payments to see how much you can save.

Compare monthly rent, jeonse deposit equivalent, and true monthly housing costs to find the best option for you.

Compare the total cost of renting vs buying a home over time. Enter rent, home price, down payment, and investment returns to make the right decision.

Calculate your home equity, loan-to-value ratio, and available equity for a HELOC or cash-out refinance. Enter your home value and remaining mortgage balance.

Calculate monthly payments for a Home Equity Line of Credit (HELOC). Estimate draw period and repayment period costs based on balance and interest rate.

Calculate monthly payments for a VA home loan. No down payment required for eligible veterans. Includes VA funding fee calculation.

Calculate your monthly FHA loan payment including MIP (mortgage insurance premium). Ideal for first-time homebuyers with lower credit scores.

Calculate your solar panel savings, payback period, and 25-year ROI. Enter your electricity bill, system cost, and local incentives.

Compare the total cost of owning an electric vehicle vs a gasoline car. Factor in fuel, maintenance, purchase price, and incentives.

Solve as many arithmetic problems as you can in 30 seconds. Choose Easy, Normal, or Hard. Track your high score!

Pop pairs of number bubbles that add up to the target value before they reach the top. Level up as you go!

Use 6 number cards and arithmetic operators to get as close to 100 as possible. Score points for precision!

Answer two-digit addition and subtraction problems as fast as you can. Build combos for bonus points!

Play cards to push the running total toward 77 — but not over! 1-player vs AI strategy card game.

Battle monsters by solving math problems! Wrong answers drain your HP. Level up and face harder foes.

Fill in the blanks to complete the equation. Unlock new stages and earn up to 3 stars per level!

Connect adjacent numbers in a 4×4 grid to reach the target sum. Longer chains multiply your score!

Master multiplication tables from 2×2 to 9×9. Earn badges for each table you complete!

Given a result and operator, find all number pairs that produce it. More answers = more bonus points!

Calculate ERA (Earned Run Average) instantly. Enter earned runs and innings pitched to get your ERA with grade. Free online baseball calculator.

Calculate batting average (BA) from hits and at bats. Shows result to 3 decimal places with grade. Free online baseball calculator.