Ideal Weight Calculator
Find your ideal body weight using the Devine formula, plus the healthy weight range for your height based on BMI. Works in metric or imperial, in your browser.
Part of 💪 Free Health & Fitness Calculators
For general information and fitness planning only — not medical advice. Talk to a doctor or dietitian before making health decisions.
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Find Your Ideal Body Weight
This free ideal weight calculator estimates a target body weight for your height and sex using the well-known Devine formula, and also shows the full healthy weight range for your height based on a normal BMI. There is no single perfect number, so seeing both a target and a range is more useful than one figure.
It works in metric or imperial and runs entirely in your browser. Use it as a rough guide for goal-setting, not a strict rule, since healthy weight depends on muscle, frame and other factors.
How to Use the Ideal Weight Calculator
- 1Choose metric or imperial units.
- 2Select your sex.
- 3Enter your height.
- 4Read your ideal weight and healthy weight range.
Why Use MakeToolz's Ideal Weight Calculator?
Devine formula
The classic ideal-body-weight formula used widely in medicine.
Healthy range too
Shows the full weight range for a normal BMI at your height, not just one number.
Metric or imperial
See results in kilograms or pounds.
Men and women
Uses the correct base weight for each sex.
100% in your browser
No signup and nothing uploaded; it all runs locally.
Free and instant
Results update the moment you change your height.
How Ideal Weight Is Estimated
People have tried to define an ideal body weight for over a century, and several formulas exist. The Devine formula, created in 1974 to help dose medications, is one of the most widely used. It starts from a base weight and adds a fixed amount for every inch of height above five feet. It is simple and quick, but because it only uses height and sex, it cannot account for how muscular you are or your frame size.
That is why this tool also shows the healthy weight range for your height using BMI, giving you a realistic band rather than one exact target. It runs entirely in your browser, with no signup and no limit.
What Affects a Healthy Weight
- Muscle mass: muscle is dense, so athletes may weigh more yet be lean.
- Frame size: a larger skeleton naturally carries more weight.
- Body composition: where and how you carry weight matters for health.
- Age and sex: both change what a typical healthy weight looks like.
Ideal Weight Formulas Compared
| Formula | Base (men / women) | Per inch over 5 ft |
|---|---|---|
| Devine | 50 kg / 45.5 kg | 2.3 kg |
| Robinson | 52 kg / 49 kg | 1.9 / 1.7 kg |
| Healthy BMI | Range for height | BMI 18.5 to 24.9 |
People Also Ask
How do I calculate my ideal weight?
Enter your height and sex above. The tool shows a Devine-formula target plus the healthy weight range for your height.
Is ideal weight the same as healthy weight?
Not exactly. Ideal weight is a single formula-based number, while a healthy weight is a range. Anywhere in the healthy range can be fine for you.
Why can two people of the same height have different healthy weights?
Muscle, frame size and body composition all vary, so the same height supports a range of healthy weights rather than one value.
Does muscle make me over my ideal weight?
It can. Muscular people often weigh more than a simple formula suggests while still being lean and healthy, which is why body fat percentage is also worth checking.
Is the ideal weight calculator free?
Yes, completely free with no signup and no limits. Everything runs in your browser.
Does it store my height?
No. Everything is calculated locally in your browser and nothing is uploaded or saved.