Fitness & Health Calculators
BMI, calories, body composition, pregnancy and training numbers. Choose a calculator below — every tool runs instantly in your browser, with no sign-up required.
BMI Calculator
Calculate your Body Mass Index from height and weight, in metric or US units.
Calorie Calculator
Estimate your daily calorie needs to maintain, lose, or gain weight.
BMR Calculator
Find your Basal Metabolic Rate — the calories your body burns at complete rest.
Body Fat Calculator
Estimate body fat percentage using the US Navy circumference method.
Ideal Weight Calculator
Estimate a healthy target weight range based on height and frame using several formulas.
Pregnancy Due Date Calculator
Estimate your due date from your last menstrual period or conception date.
Macro Calculator
Calculate daily protein, carb and fat targets based on your calorie goal.
TDEE Calculator
Calculate your Total Daily Energy Expenditure based on activity level.
Calories Burned Calculator
Estimate calories burned during common activities based on duration and body weight.
One Rep Max Calculator
Estimate your one-rep max strength from a weight and rep count you've lifted.