Health & Fitness
Free health and fitness calculators — BMI, TDEE, BMR, body fat, ideal weight, calorie, macro, water and protein intake, heart rate, pace and more, with formulas and guidance.
BMI Calculator
Calculate your Body Mass Index (BMI) in metric or imperial units, with category and healthy weight range.
TDEE Calculator
Estimate your Total Daily Energy Expenditure (TDEE) — maintenance, weight loss and weight gain calories.
BMR Calculator
Calculate Basal Metabolic Rate (BMR) using the Mifflin-St Jeor or Harris-Benedict formula for men and women.
Body Fat Calculator
Estimate body fat percentage with the US Navy method, plus fat mass and lean body mass.
Calorie Calculator
Find your daily calorie needs for weight loss, maintenance or weight gain based on your goal.
Ideal Weight Calculator
Estimate your ideal body weight with the Devine, Robinson, Miller and Hamwi formulas.
Water Intake Calculator
Find your recommended daily water intake based on body weight, exercise and climate.
Protein Intake Calculator
Calculate your daily protein needs for muscle gain, fat loss or maintenance.
Macro Calculator
Split your daily calories into protein, carbohydrate and fat grams with preset macro plans.
Weight Loss Calculator
Plan your weight loss timeline and the daily calorie deficit needed to reach your goal weight.
Pregnancy Due Date Calculator
Estimate your pregnancy due date and current week from your last menstrual period.
Ovulation Calculator
Predict your most fertile days and ovulation date based on your cycle length.
Heart Rate Zone Calculator
Calculate your maximum heart rate and training zones for fat burning and cardio.
Pace Calculator
Calculate running, walking or cycling pace and speed from distance and time.
Steps to Calories Calculator
Estimate the calories burned from your daily step count and body weight.
Sleep Calculator
Find the best wake-up times based on 90-minute sleep cycles and when you go to bed.
Healthy Weight Range Calculator
Find your healthy weight range for your height using WHO BMI guidelines.
Waist-to-Hip Ratio Calculator
Calculate your waist-to-hip ratio (WHR) and assess body-shape health risk.
Lean Body Mass Calculator
Estimate your lean body mass and fat mass using the Boer formula.
Body Surface Area Calculator
Calculate body surface area (BSA) with the Mosteller and Du Bois medical formulas.