Health & FitnessHealth & Fitness Calculators
32 free tools across 5 categories — body measurements & weight, calories & metabolism, exercise & performance, nutrition & macros, and general wellness.
Health & Fitness32 free tools across 5 categories — body measurements & weight, calories & metabolism, exercise & performance, nutrition & macros, and general wellness.
Calculate your Body Mass Index (BMI) instantly from your height and weight.
Estimate your ideal body weight based on your height, age, and gender using the Devine formula.
Estimate your body fat percentage using the U.S. Navy circumference method.
Calculate your lean body mass (muscle, bone, organs) using the Boer formula.
Estimate your somatotype (ectomorph, mesomorph, or endomorph) from your wrist size and height.
Calculate your waist-to-hip ratio (WHR) to assess health risk distribution.
Calculate your waist-to-height ratio, a simple and reliable predictor of health risk.
Calculate your Fat-Free Mass Index (FFMI) to assess muscle mass relative to your height.
Estimate body fat percentage using the U.S. Army circumference (tape test) method and compare it to standard limits.
Calculate your daily calorie needs based on your goal: lose, maintain, or gain weight.
Calculate your Basal Metabolic Rate — the calories your body burns at complete rest.
Calculate your Total Daily Energy Expenditure based on your BMR and activity level.
Estimate calories burned during exercise based on activity type, duration, and your weight.
Calculate your recommended daily water intake based on your body weight.
Estimate your one-repetition maximum (1RM) using the Epley formula.
Calculate your ideal training heart rate zone using the Karvonen formula.
Calculate your running pace and predict race finish times for other distances.
Estimate your VO2 max (cardiorespiratory fitness) using the Cooper 12-minute run test.
Estimate how many calories you burn from your daily step count.
Estimate how long a hike will take based on distance, elevation gain, and pace using Naismith's Rule.
Calculate your daily protein, carbohydrate, and fat targets based on your total calories and goal.
Calculate your daily calorie and macro targets for a ketogenic (very low-carb, high-fat) diet.
Calculate your recommended daily protein intake based on body weight and activity level.
Calculate your recommended daily carbohydrate intake based on total calories.
Calculate your recommended daily fat intake based on total calories.
Calculate your eating and fasting windows based on your preferred fasting schedule.
Check your daily sodium intake against recommended health guidelines.
Check your recommended daily calcium intake based on your age and gender.
Get a fun, educational estimate of your biological age based on lifestyle habits.
Calculate the best bedtime or wake-up time based on 90-minute sleep cycles.
A short self-assessment to reflect on your current stress level (not a clinical diagnosis).
Calculate your LDL cholesterol using the Friedewald equation and see your total cholesterol-to-HDL ratio.