About FitCalc

FitCalc is a small collection of free health and fitness calculators.

Our goal is simple: give people quick, accurate answers about their body without requiring an account, an app download, or sharing personal data. Every calculator runs entirely in your browser using standard, well-documented formulas — the Mifflin-St Jeor equation for metabolic rate, the U.S. Navy tape method for body fat, and WHO BMI categories.

Our approach

• Privacy first. Your measurements never leave your device.
• Transparency. Each tool explains the formula it uses.
• Free to use. The site is supported by advertising.

Disclaimer

FitCalc provides general information only. It is not medical advice, and it is not a substitute for consultation with a qualified healthcare professional. Always seek the advice of your doctor regarding any health or fitness decision.