Health & Fitness calculators

BMI, BMR, TDEE, calorie deficit, body fat, ideal weight, macros, water intake, running pace and pregnancy due date calculators based on published equations.

• BMI CalculatorBody mass index from height and weight, the CDC adult category and the healthy-weight range for your height.
• BMR CalculatorCalories your body burns at complete rest, from the Mifflin–St Jeor equation, in US or metric units.
• Body Fat Calculator (U.S. Navy Method)Body-fat percentage from height, neck, waist (and hip for women) using the U.S. Navy circumference equations.
• Calorie Deficit CalculatorDaily calorie target for a chosen weekly weight-loss rate, the deficit it implies and a rough timeline to your goal.
• Ideal Weight CalculatorIdeal body weight by the Devine formula, the old height–weight rule, and the healthy-BMI weight range for your height.
• Macro CalculatorSplit a daily calorie target into grams of protein, carbohydrate and fat, checked against the National Academies’ AMDRs.
• Pace CalculatorRunning or walking pace per mile and per km from distance and time, or finish time from a target pace.
• Pregnancy Due Date CalculatorEstimated due date (280 days from the last menstrual period), how far along you are today and trimester dates.
• TDEE CalculatorCalories you burn per day including activity: BMR (Mifflin–St Jeor) × physical activity level.
• Water Intake CalculatorDaily water from drinks based on the National Academies’ adequate intake, plus an optional allowance for exercise.