Body Fat Percentage Calculator — YMCA Method
By ToolZoneX Team
•
August 2026
The YMCA method estimates body fat percentage using only body weight and waist circumference — no calipers or tape measure of the neck or hips required, unlike the US Navy method.
How to Use Body Fat Percentage Calculator
1.
Enter your body weight2.
Enter your waist circumference at the navel3.
View your estimated body fat percentage
Key Features
- Uses the YMCA body fat formula
- Needs only weight and waist circumference
- Simpler input than the US Navy method
When to Use This Tool
•
Getting a quick body fat estimate without a tape measure of the neck/hips•
Tracking body composition trends over time•
Comparing results against the Navy-method Body Fat Calculator
Frequently Asked Questions
This tool uses the YMCA method (weight and waist only). The separate Body Fat Calculator uses the US Navy tape-measure method (neck, waist, height, and hip for women). The two can give slightly different results.
It is a reasonable estimate for the general population but, like all circumference-based formulas, is less precise than lab methods such as DEXA scans, and less accurate for very muscular or very lean individuals.
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