Ideal Weight Calculator
See ideal body weight ranges from four established formulas.
Quick answer
'Ideal' weight is an estimate from formulas like Devine or Robinson (based mainly on height and sex) or from the healthy BMI range of 18.5–24.9 for your height. It's a rough target, not a medical prescription — frame and body composition matter too.
Ideal weight (Devine formula)
70 kg
Robinson
69 kg
Miller
69 kg
Hamwi
72 kg
Healthy BMI range
57 kg–76 kg
Four formulas, one idea
Each formula anchors a base weight at 5 feet and adds per inch above it. Devine (1974) was built for drug dosing and became the clinical default; Robinson and Miller are later refinements; Hamwi is the oldest. They typically agree within a few kilograms — the spread is the honest answer.
Ideal is a range, not a number
Frame size, muscle mass, and age all shift what's healthy for an individual — the healthy-BMI weight span for your height is a better target zone than any single formula's output. Use these numbers as orientation, not prescription.
Frequently asked questions
- How does the Ideal Weight Calculator work?
- 'Ideal' weight is an estimate from formulas like Devine or Robinson (based mainly on height and sex) or from the healthy BMI range of 18.5–24.9 for your height. It's a rough target, not a medical prescription — frame and body composition matter too.
- Is the Ideal Weight Calculator free to use?
- Yes. The Ideal Weight Calculator is completely free, runs entirely in your browser, and requires no account or sign-up. Your inputs never leave your device.
Sources & methodology
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