Eleven free calculators for weight, energy, fitness, sleep, and cycle tracking. Each one runs entirely in your browser — nothing you enter is stored or sent anywhere. Pick a reading below to get started.
Free BMR calculator using the Mifflin-St Jeor equation. Find out how many calories your body burns at rest.
02Free TDEE calculator. Combine your BMR with your activity level to find your total daily calorie burn.
03Free calorie calculator. Get a daily calorie target for losing, maintaining, or gaining weight based on your stats and goal.
04Free macro calculator. Turn a daily calorie target into grams of protein, carbs, and fat for balanced, high-protein, low-carb, or keto eating.
05Free water intake calculator. Estimate your daily fluid needs based on body weight and exercise.
Free BMI calculator. Enter your height and weight to find your Body Mass Index and see which category it falls in.
07Free body fat calculator using the U.S. Navy circumference method. Estimate body fat percentage from tape measurements.
08Free ideal weight calculator using the Devine formula. Get a reference body weight range based on height and sex.