Why do the formulas give different numbers?

Each formula was developed from different data and assumptions, so they vary slightly. The average gives a reasonable middle estimate.

Is ideal weight the same as a healthy weight?

Not exactly. Ideal weight formulas are height-based estimates; a healthy weight also depends on body composition, age and overall health.

Do these formulas apply to children?

No. These adult height-based formulas are not suitable for children or teenagers, who need age- and sex-specific growth charts.

Health & Fitness

Ideal Weight Calculator

Estimate your ideal body weight from your height using four well-known formulas.

Free browser toolRuns in your browserNo sign-up

Sex

Height (cm)

70.0kg

Ideal weight (average) · 154.4 lb

Devine

70.5 kg

Robinson

68.9 kg

Miller

68.7 kg

Hamwi

72.0 kg

This tool is for general information only and is not medical advice. Talk to a qualified healthcare professional before making health decisions.

About the Ideal Weight Calculator

There is no single perfect weight, but several formulas estimate a healthy target based on your height and sex. This calculator shows four of the most widely used: Devine, Robinson, Miller and Hamwi.

It also gives an average of the four so you have a simple single figure, in both kilograms and pounds.

Results are guides, not strict targets, and do not account for muscle mass or body composition. Everything is calculated in your browser.

Key features

Four established formulas plus an average
Results in kg and lb
Separate values for men and women
Private, in-browser calculation

How to use

1Select your sex.
2Enter your height.
3Compare the estimated ideal weights.

Examples

Compare adult weight formulas

Input: Male, 175 cm

Output: Devine, Robinson, Miller and Hamwi estimates plus their average

The range is more informative than treating one formula as a required target.

Frequently asked questions

Why do the formulas give different numbers?: Each formula was developed from different data and assumptions, so they vary slightly. The average gives a reasonable middle estimate.
Is ideal weight the same as a healthy weight?: Not exactly. Ideal weight formulas are height-based estimates; a healthy weight also depends on body composition, age and overall health.
Do these formulas apply to children?: No. These adult height-based formulas are not suitable for children or teenagers, who need age- and sex-specific growth charts.

Open a related tool to prepare your files or refine the finished result.