MyFatCalc
Free body fat calculator using scientifically validated formulas and multiple methods.

MyFatCalc is a free, browser-based body fat percentage calculator that uses four peer-reviewed methods: CUN-BAE, U.S. Navy, BMI, and Jackson-Pollock. It estimates body fat percentage, lean body mass, and personalized weight goals without requiring an account or sending data to any server. The tool is designed for easy comparison across methods and units while keeping all calculations and history local to the user's device.
Users enter measurements such as height, weight, age, sex, and optionally tape or skinfold measurements, and the tool calculates body fat percentage using one of four validated formulas entirely within the browser.
individuals tracking their body composition and fitness goals at home
Background.
- Status
- launched
- Business model
- free
Similar projects.
Editorial take on the space this project sits in — momentum signals, adjacent moves, our call on whether the wedge is real. Get pinged when we publish a new read or when the landscape shifts.
Have a take on this space?
Tell us what you’d build differently, where you think the incumbents miss, or what we’ve gotten wrong about this project. Comments + reactions are coming soon.