Fitness calculators

Track your body and training: BMI, calories, body fat, ideal weight, running pace, strength and heart-rate zones.

Several of these measure a similar thing in different ways, and it's easy to pick the wrong one. BMI is a quick screening number from height and weight alone — fast, but it can't tell muscle from fat. Body Fat (Navy tape method) and Lean Body Mass get closer to actual body composition by also measuring your neck and waist. Ideal Weight and Healthy Weight both suggest a target, but from different starting points: Ideal Weight averages four classic formulas (Devine, Robinson, Miller, Hamwi), while Healthy Weight works backwards from a healthy BMI range for your height.

Calorie, BMR and TDEE are also related: BMR is calories burned at complete rest, TDEE adds your activity level on top, and Calorie turns that into a target for losing, maintaining or gaining weight. Pace, One Rep Max and Target Heart Rate are for runners and lifters tracking training numbers rather than body composition.

BMI CalculatorBMI for adults (Asian and WHO ranges) and for children by age and gender Calorie CalculatorDaily calories to maintain, lose or gain weight Body Fat CalculatorBody fat % by the US Navy tape method and BMI method BMR CalculatorBasal metabolic rate with three proven formulas Ideal Weight CalculatorIdeal body weight by four classic formulas Pace CalculatorRunning pace, time or distance — solve any one Army Body Fat CalculatorUS Army tape-test body fat and allowed limit Lean Body Mass CalculatorLean mass by Boer, James and Hume formulas Healthy Weight CalculatorYour healthy weight range for your height Calories Burned CalculatorCalories burned in 30+ activities (MET based)One Rep Max CalculatorEstimate your 1RM and training percentages Target Heart Rate CalculatorHeart rate zones with the Karvonen method Macro CalculatorDaily protein, carbs and fat targets for your goal TDEE CalculatorTotal daily energy expenditure by activity level