Calculate BMI, body fat, macros, TDEE, one rep max, running pace, and plan your workouts — all for free. No signup, no guesswork.
BMI, body fat percentage, ideal weight, BMR, TDEE, lean mass, and waist-to-hip ratio calculators.
Calorie calculators, macro splits, protein intake, water needs, meal prep, and intermittent fasting planners.
One rep max, pace calculator, heart rate zones, calories burned, training volume, rest periods, and progressive overload.
Weight loss timelines, muscle gain projections, running goals, body recomposition, fitness age, step goals, and workout splits.
Calculate your Body Mass Index (BMI) to see where you fall on the underweight-to-obese scale. BMI uses your height and weight to estimate body fat.
Estimate your body fat percentage using the U.S. Navy method. All you need is a measuring tape and a few circumference measurements.
Calculate your Basal Metabolic Rate — the number of calories your body burns at complete rest just to keep you alive.
Calculate your Total Daily Energy Expenditure — the total calories you burn per day including all activity. Essential for any diet or fitness goal.
Estimate your one-rep max (1RM) for any lift using the Epley, Brzycki, and Lombardi formulas. Know your max without the injury risk of testing it.
Calculate your running pace, finish time, or distance. Enter any two values to solve for the third. Covers miles and kilometers.