Free Online Health Calculators
Monitor your health with our free online health calculators. BMI, BMR, calorie needs, body fat percentage, ideal weight, and more — free and easy to use.
-
BMI Calculator
Calculate your Body Mass Index (BMI) instantly. Supports metric (cm/kg) and imperial (ft/lb). WHO weight category included.
-
Calorie & TDEE Calculator
Calculate your BMR and Total Daily Energy Expenditure (TDEE) using the Mifflin-St Jeor formula. Get calorie targets for weight loss, maintenance, and gain.
-
Pregnancy Calculator
Calculate your estimated due date, conception date, gestational age, and key pregnancy milestones from your last menstrual period (LMP) or conception date.
-
Ideal Weight Calculator
Calculate your ideal body weight based on height and gender using multiple formulas. Free online.
-
Water Intake Calculator
Calculate your daily water intake based on body weight and activity level. Free hydration calculator.
-
Macro Calculator
Calculate your daily macronutrient goals (protein, carbohydrates, fat) for weight loss, gain, or maintenance.
-
Sleep Calculator
Find your ideal bedtime or wake-up time based on 90-minute sleep cycles. Free online sleep cycle calculator.
-
Body Fat Calculator
Calculate your body fat percentage using the US Navy method. Enter height, neck, waist, and hips. Free online.
-
BMR Calculator
Calculate your Basal Metabolic Rate (BMR) using the Mifflin-St Jeor equation. Find how many calories you burn at rest.
-
Pace Calculator
Calculate running pace, speed, and finish time. Enter any two values to find the third. Perfect for runners and cyclists.
-
BAC Calculator
Estimate your Blood Alcohol Content (BAC) based on drinks consumed, weight, gender, and time. Educational purposes only.
-
Ovulation Calculator
Calculate your ovulation date and fertile window based on your last period. Find your best days to conceive.
-
Steps to Miles Calculator
Convert steps to miles and kilometers. Calculate how far you walked based on step count and stride length.
-
WHR Calculator
Calculate your Waist-to-Hip Ratio (WHR) and assess your health risk. Enter waist and hip measurements.
-
Sobriety Calculator
Calculate how long you have been sober. Track your sobriety milestone in days, weeks, months, and years.
-
Kilojoules to Calories Converter
Convert kilojoules to calories (kcal) and vice versa. Quick kJ to Cal conversion for food and nutrition labels.
-
Exercise Calories Calculator
Calculate calories burned during exercise based on activity type, duration, weight, and intensity. Covers 30+ exercises including running, cycling, and swimming.
-
Walking Calories Calculator
Calculate calories burned walking based on distance, speed, weight, and terrain. Get accurate results for treadmill or outdoor walking.
-
Blood Pressure Calculator
Enter your systolic and diastolic blood pressure readings to see your BP category (normal, elevated, hypertension stage 1 or 2) per AHA guidelines.
-
Heart Rate Calculator
Calculate your maximum heart rate, resting HR, and target heart rate zones for fat burn, cardio, and peak training based on age.
-
Calorie Deficit Calculator
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.
-
Pregnancy Week Calculator
Calculate how many weeks pregnant you are from your last menstrual period (LMP) or conception date. See your trimester and estimated due date.