Ideal Weight Calculator

Enter your height and sex to see ideal body weight estimates from three classic clinical formulas and the healthy weight range a BMI of 18.5–24.9 implies for your height.

Enter your details and press Calculate ideal weight.

The ideal-weight formulas

Ideal body weight (IBW) formulas estimate a reference weight from height. The three classic ones all add weight per inch over 5 feet:

Devine (M) = 50 kg + 2.3 kg × (inches over 5 ft)

Robinson and Miller use slightly different base weights and per-inch amounts; women use lower base figures in each. These were originally designed for medication dosing, not as beauty standards, which is why they give a single number rather than a range.

Worked example

A male, 5 ft 10 in (10 inches over 5 ft):

Devine: 50 + 2.3 × 10 = 73.0 kg (≈ 160.9 lb).
Robinson: 52 + 1.9 × 10 = 71.0 kg (≈ 156.5 lb).
Healthy BMI range (18.5–24.9): ≈ 128.9–173.4 lb.

How to read the result

No single number is "correct." The formulas disagree by several pounds, and they ignore frame size, muscle mass and body composition — an athlete can be heavier than IBW yet very healthy. A healthy range based on BMI is usually more useful than a single target. Use these figures as a rough reference, not a verdict.

Tip: pair this with the BMI calculator and body-fat calculator for a fuller picture, and talk to a clinician about goals that fit your body.

Frequently asked questions

What is ideal body weight?

It's a reference weight estimated from height, originally for medication dosing. The Devine, Robinson and Miller formulas each add a fixed amount per inch above 5 feet, with lower figures for women.

Which ideal weight formula is best?

None is definitively best — they were built for different purposes and disagree by a few pounds. A healthy weight range from BMI (18.5–24.9) is usually more meaningful than one fixed number.

Does muscle mass affect this?

Yes. The formulas use only height and sex, so they don't account for muscle. Muscular people can exceed their IBW while being lean and healthy; body-fat percentage gives a better read.

How much should I weigh for my height?

There's a healthy range, not one number. For a 5 ft 10 in adult a BMI of 18.5–24.9 spans roughly 129–173 lb. Frame, muscle and composition shift where in that range is right for you.

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Mustafa Bilgic · Editor, Calcool
The Devine, Robinson and Miller formulas are established clinical references. For healthy-weight guidance see the U.S. Centers for Disease Control and Prevention (CDC). These are estimates, not medical advice — consult a clinician.

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