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Ideal Weight Calculator

A free Ideal Weight Calculator that estimates a healthy target weight using four well-known clinical formulas — Devine, Robinson, Miller, and Hamwi — plus the WHO healthy weight range for your height. See your ideal weight in kg or lbs, the average across all formulas, and an easy-to-read comparison. All calculations happen in your browser — private and mobile-friendly.

Your Details

Gender

Height (cm)

Ideal body weight is a clinical estimate — muscle mass, frame size and body composition matter more than any single number. This is guidance, not medical advice.

Average Ideal Weight

57.6 kg

Devine

1974 formula, widely used in clinical drug dosing.

56.9kg

Robinson

1983 revision of Devine, slightly lighter.

57.4kg

Miller

1983 formula, runs lighter for taller people.

59.8kg

Hamwi

1964 rule of thumb, runs heavier.

56.4kg

WHO Healthy Weight Range

50.4–67.8kg

Ideal ~59.1 kg

Derived from a healthy BMI of 18.5–24.9 for your height. Most people feel best within this band, adjusted for body composition.

Your Details

Gender

Height (cm)

Ideal body weight is a clinical estimate — muscle mass, frame size and body composition matter more than any single number. This is guidance, not medical advice.

Frequently Asked Questions

Everything you need to know about ideal body weight formulas

What is ideal body weight?

Ideal body weight is a clinical estimate of a healthy weight for a given height, most often used in medical settings to guide medication dosing and nutrition planning. It is not a diagnosis — your healthy range depends on muscle mass, frame size, age, and many other factors.

Which formula is most accurate?

No single formula is universally 'best'. Devine is the most widely used in clinical practice, Robinson and Miller tend to run lighter, and Hamwi runs heavier. This is why we show all four side-by-side plus the average, so you can see the range rather than a single magic number.

What is the WHO healthy weight range?

The WHO range is derived from a healthy Body Mass Index of 18.5–24.9 for your height (min = 18.5×h², max = 24.9×h²). It gives a broader, evidence-based band than any single formula. Your ideal weight should generally fall inside this range.

Is my data private?

Yes. Everything runs in your browser. Your height and weight never leave your device.

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