How do I find my healthy weight range for my height?

Pick Sex and Units, then enter your Height. The Healthy weight range shows the weights that put your BMI between 18.5 and 24.9 for that height. Current weight is optional.

Which ideal body weight formulas does it use?

It shows the Devine, Robinson, Miller and Hamwi formulas, which use sex and height, plus their Average. The page notes these were originally designed for medication dosing, so the BMI-based range is shown first.

Why do the four formulas give different weights?

Each formula was developed separately with different coefficients, so the results differ by a few kilograms. The tool shows all four and their average rather than picking one.

What height range is accepted, and can I use feet and inches?

Heights from 100 to 250 cm are accepted, which is 3 ft 3 in to 8 ft 2 in. Switch Units to Imperial to enter feet and inches, and weight in lb.

Yes. Every tool is free to use, with no account and no credit card. The work runs on your device rather than on our servers, which is what keeps it free to run.

Does it work on mobile?

Yes. It runs in current mobile browsers on iOS and Android, with nothing to install.

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Free Ideal Weight Calculator

Q: Does the healthy range apply to athletes, children or pregnancy?

No. The tool says these estimates are for healthy adults and do not apply to children, athletes with high muscle mass, or pregnancy. BMI is a screening tool, not a diagnosis.

Find your healthy weight range for your height plus the classic ideal-body-weight formulas (Devine, Robinson, Miller, Hamwi). Add your weight for your BMI and the gap to a healthy weight. Metric or imperial, private and free.

Runs in your browserNo sign-up, no pop-upsNo login requiredFree foreverBMI healthy range4 IBW formulas

Works offline once loaded

See the healthy weight range for your height, plus the four classic ideal-body-weight formulas. Add your current weight for your BMI. Everything is calculated privately in your browser.

Sex

Units

Height

Current weight (optional)

Healthy weight range

53.5 kg – 72 kg

Based on a BMI of 18.5–24.9 for your height

Ideal body weight (reference formulas)

Devine	65.9 kg
Robinson	65.2 kg
Miller	66 kg
Hamwi	66.7 kg
Average	65.9 kg

⚠️ These are estimates for healthy adults and not medical advice. They do not apply to children, athletes with high muscle mass, or during pregnancy. BMI is a screening tool, not a diagnosis — talk to a healthcare provider about your individual situation.

🔒 Your height and weight never leave your device — everything is calculated in your browser.

Common uses

Ideal Weight for Your HeightFind the healthy weight range for your height and the classic ideal-body-weight estimates.
Ideal Weight for MenCalculate ideal and healthy weight ranges for men using sex-specific formulas.
Ideal Weight for WomenCalculate ideal and healthy weight ranges for women using sex-specific formulas.
How Much Should I Weigh?Get a healthy weight range plus four reference estimates for your height and sex.
Devine Formula CalculatorCompute ideal body weight with the 1974 Devine formula, widely used for drug dosing.
Robinson Formula CalculatorCompute ideal body weight with the 1983 Robinson formula.

How It Works

Shows the healthy weight range for your height — the weights that put your BMI between 18.5 and 24.9 — and reports the four classic ideal-body-weight formulas (Devine, Robinson, Miller, Hamwi) with their average. Enter a current weight to see your BMI and how far you are from the healthy range. Everything is computed in your browser.

1
Choose sex and units
The IBW formulas use sex-specific coefficients. Switch between metric (cm / kg) and imperial (ft·in / lb) at any time.
2
Enter your height
The healthy weight range is derived from your height alone; the IBW formulas add sex.
3
Optionally add your current weight
See your BMI, whether you are under, within, or over the healthy range, and the kilograms or pounds to the nearest healthy bound.
4
Read the results
Lead with the BMI-based healthy range; the four single-number formulas are shown for reference, since they were originally designed for medication dosing.

Your height and weight never leave your device — every number is computed locally in your browser.

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Free Ideal Weight Calculator

Common uses

How It Works

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Frequently Asked Questions