Add screening context.
Body Fat Calculator
Estimate body-fat percentage from measurements and use it for trend-based decisions.
Measure under similar conditions each time for better trend quality.
Result Interpretation
Body-fat estimates add composition context that bodyweight alone cannot provide. This is especially useful when weight is changing but composition quality is unclear.
Formula
Uses the U.S. Navy equation with sex-specific measurement inputs.
Practical Usage
Use the same measurement timing, tape tension, and posture each check. Track trend every 2 to 4 weeks, not daily. Pair with calorie adherence and performance data before adjusting diet aggressively.
Recommended workflow: check body-fat trend, estimate maintenance in TDEE Calculator, set intake in Calorie Calculator, then execute in Diet Log.
Limitations
Tape-based methods are practical but not lab-precise. Small measurement errors can shift outputs, so trend direction is more important than one reading.
FAQ
Is this as accurate as DEXA?
No. This is a practical field estimate.
How often should I recheck?
Usually every 2 to 4 weeks for meaningful trend signals.
Does hydration affect results?
Yes. Keep conditions consistent.
Should I use this with BMI?
Yes. Combining metrics gives better context.
Can this guide calorie changes?
Yes, when interpreted with intake adherence and training performance.
Related Calculators
Estimate non-fat mass trend.
Set calorie baseline.
Track diet execution vs target.