All calculators
Nine tools, each with its formula on the page and its sources listed. They run in your browser; nothing you type is sent anywhere.
calculatorTDEE calculatorTotal daily energy expenditure: the calories you burn in a day, including activity.calculatorBMR calculatorBasal metabolic rate with three equations side by side: Mifflin-St Jeor, Harris-Benedict and Katch-McArdle.calculatorCalorie deficit calculatorHow many calories to eat to lose weight at a pace you choose, with a safety floor.calculatorMacro calculatorProtein, carbs and fat in grams for balanced, high-protein, lower-carb or keto eating.calculatorProtein calculatorDaily protein in grams for your weight and goal, from the RDA to muscle gain.calculatorWater intake calculatorDaily fluid needs from the NASEM reference values, adjusted for exercise.calculatorBody fat calculatorU.S. Navy tape-measure method: neck, waist and (for women) hips.calculatorBMI calculatorBody mass index with the standard adult categories and what BMI does not tell you.calculatorGoal date calculatorWhen you could reach a goal weight at a given calorie target, and why it is an estimate.
Not sure where to start? Begin with TDEE: almost every other number on this site builds on it.