BODY COMPOSITION · CALORIES · NUTRITION
Your numbers.
A little clearer.
Free calculators to understand your body measurements. Clear methods, useful context, and space to track change.
Start with a measurement.
All calculatorsYOUR RESULT
Start with your numbers.
Complete the fields to see your result, the method behind it, and what to keep in mind.
Methods and assumptions stay with your result. No account or photo upload is needed.
THE TOOLKIT
One question. A useful answer.
Body fat calculator
Choose a measurement method. Estimate body fat, fat mass, and lean mass.
TDEE calculator
Estimate daily energy needs and compare activity assumptions.
Calorie deficit calculator
Explore how a calorie adjustment changes an energy estimate.
Protein calculator
Convert a protein reference in grams per kilogram into daily grams.
Macro calculator
Turn a calorie amount and macro percentages into grams.
Waist-to-height ratio calculator
Compare your waist measurement with your height, in either unit system.
BEHIND THE NUMBERS
Understand the method.
Make the result useful.
An estimate is a starting point. These guides explain what changes it.
How to take tape measurements
Use the right landmarks for your selected method.
Why calculators give different answers
Understand the methods behind the numbers.
How to choose an activity level
Include your whole day, not only your workouts.
How to compare measurements over time
Keep the method consistent and the context visible.