Frequently asked questions
Which calculator should I start with?
If you want to lose fat or build muscle, start with the calorie calculator: it gives your daily target and macros. Then fine-tune protein with the protein calculator.
Is my data sent anywhere?
No. Every calculation runs in your browser. Your values only appear in the address bar so you can share the result.
How accurate are the calculators?
They use established, studied formulas (Mifflin-St Jeor, WHO BMI categories, the US Navy method, ISSN protein guidance), but every one is an estimate. Adjust from how your body responds.