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Body Fat Calculator by LilBite
Body Fat Percentage Calculator
Calculate your body fat percentage using the U.S. Navy Method
About the U.S. Navy Method
The U.S. Navy Method is one of the most accurate ways to calculate body fat percentage without specialized equipment. It uses circumference measurements of specific body parts to estimate body fat percentage. While not as accurate as methods like DEXA scans or hydrostatic weighing, it provides a good estimate for tracking progress.
Understanding Body Fat Percentage
Body fat percentage gives better context than scale weight alone. It helps you separate fat loss from muscle gain and track whether your nutrition strategy is moving in the right direction.
- Use the same measuring method and timing each week for consistent trend data.
- Compare waist and neck measurements carefully to reduce input error.
- Combine body-fat tracking with strength performance and photos for better decisions.
Common questions
Is the U.S. Navy method perfect?
No method is perfect, but it is practical and repeatable. Consistent tracking matters more than a single absolute number.
How fast should body fat change?
Gradual change is more sustainable. Large swings often indicate water shifts rather than true fat change.
Take your target with you
Turn today’s estimate into an everyday habit.
Log meals, check your macros, and stay close to your daily targets with Lilbite’s simple food tracker on iOS and Android.
Fast food loggingDaily macro progressSimple meal history
