How to Measure Your Height

Height is the denominator of the WHtR formula, so it matters as much as your waist: a one-inch error changes your ratio by roughly 0.008 at a 36-inch waist — enough to matter at borderline heights. Every inch of height is worth 0.55 inches of waist allowance, so underestimating your height understates how much room you actually have.

The official Army measurement is taken by trained personnel using a stadiometer. This page describes a reliable home method you can do with a wall and a book — it is a planning input, not a substitute for the official number.

What you need

A flat wall with no baseboard at the contact point (or measure above it)
A stiff, flat object — a hardcover book or small ruler
A pencil (light mark; only if the wall is yours to mark)
A measuring tape
A second person (strongly preferred — doing this alone tilts the flat object)

Step-by-step protocol

Remove your shoes and any headwear.
Stand with your back against the wall, heels touching the wall.
Feet together; buttocks, shoulder blades, and the back of your head touching the wall (if this is uncomfortable, get as close as you can while keeping heels down).
Look straight ahead in the Frankfort plane: your lower eye socket and the opening of your ear should line up horizontally.
Have your helper place the flat object against the wall and lower it until it rests on the top of your head.
Mark the wall at the bottom edge of the flat object.
Step away and measure from the floor to the mark with the tape.
Record to the nearest ¼ inch.

Common errors

Wearing shoes — adds one to two inches and makes every calculation optimistic.
Looking up or down — changes head position and can add or lose half an inch; keep the Frankfort plane level.
Heels away from the wall — under-measures your standing height.
Measuring alone — the flat object tilts without a helper, and a tilted book reads short.

If you measured in centimeters

The WHtR ratio works in any unit as long as both values match, but if you want your height in inches, divide centimeters by 2.54 — the inches-to-cm converter does this in both directions with the exact factor. The height-to-inches converter handles feet-and-inches input directly.

Use the calculator

With height and an honest waist measurement, run both through the WHtR calculator. For a goal with margin instead of aiming at the line, use the waist target calculator. Measurement protocol details and rounding are documented on the Methodology page.

WHtR calculator — the current standard
How to Measure Your Waist for WHtR — the other half of the formula
Height to Inches Converter
Inches to cm Converter
Will I Pass the Army Height & Weight Test? — the complete guide

Informational only — not an official ABCP determination. Official measurements are taken and recorded by Army personnel using a stadiometer and the official protocol.