Fitness & Nutrition Calculators
A free set of fitness and nutrition calculators — no sign-up, nothing stored anywhere but your own device. Each one cites its source formula.
Already have a number in mind and just deciding how to eat? Our diets guide covers popular eating patterns and the evidence behind each.
Calorie Calculator
The quickest way to find your daily calorie target — no fitness jargon required.
TDEE Calculator
Find your daily calorie needs and a target range for your goal.
BMR Calculator
See how many calories your body burns at complete rest.
Macro Calculator
Turn a calorie target into protein, carb, and fat grams.
Protein Calculator
Get a daily protein gram range for your body weight and goal.
Navy Body Fat Calculator
Estimate body fat from a few tape-measure inputs using the U.S Navy method.
BMI Calculator
Check your body mass index against CDC categories.
Sleep Cycle Calculator
Find the best bedtime or wake-up time based on 90-minute sleep cycles.
Waist-to-Height Ratio Calculator
A companion to BMI that looks at where you carry weight, using NICE's risk bands.
Ideal Weight Calculator
Get a reference weight range using the Devine formula.
Calories Burned Calculator
Estimate calories burned for walking, running, cycling, swimming, and more.
One-Rep Max Calculator
Estimate your max single-rep lift from a recent set.
VO2 Max Calculator
Estimate your aerobic fitness level three different ways.
Walking Calorie Calculator
A more precise calorie estimate built specifically for walking.
Water Intake Calculator
Estimate your daily water needs from body weight, exercise, and climate.