How to Calculate Your Army WHtR (Waist-to-Height Ratio)
The exact formula for calculating Army waist-to-height ratio under the ABCP standard, including why it's truncated rather than rounded, with a worked example.
Army WHtR is one of the simplest body composition measurements in use — a single division, compared against a single universal threshold, with no lookup tables involved.
The formula
- Measure waist circumference at the navel, ideally averaging 3 readings.
- Round the averaged waist measurement down to the nearest 0.5 inch.
- Divide waist (inches) by height (inches).
- Truncate — don't round — the result to 3 decimal places.
Worked example
A soldier who is 5'10" (70 inches) tall with an averaged, rounded-down waist of 38 inches: 38 ÷ 70 = 0.542857142857..., truncated to 0.542. Since 0.542 is under 0.550, this is a pass.
Why truncation, not rounding, matters
Rounding a value like 0.5498 to 3 decimals would give 0.550 — a fail. Truncating the same value gives 0.549 — a pass. Truncation is always at least as strict as rounding for someone near the threshold, since it can never round a borderline value up into a passing score.
Run your own height and waist measurement through the Army WHtR Calculator to get your exact ratio, pass/fail status, and maximum allowable waist automatically.