Ideal Weight Range
What do the classic formulas say your ideal weight is? Enter your height and see.
| Formula | Result |
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The four formulas rarely agree exactly — that is normal. They are rough rules of thumb, not prescriptions.
Estimates for education — not medical advice. Talk to a healthcare professional about a healthy weight for your body.
How to read your ideal weight range
- Pick your units and enter your height, then choose your sex.
- Press Calculate weight range. The Devine, Hamwi, Robinson, and Miller results appear in a table.
- Compare the four formulas. They rarely agree exactly — the spread is normal and shows how approximate they are.
- Use the highlighted consensus range — the span across all four formulas plus the healthy BMI range — as your ballpark.
Frequently asked questions
Which ideal weight formula is most accurate?
None of them is truly accurate — Devine, Hamwi, Robinson, and Miller are all rough rules of thumb developed decades ago, and they disagree with each other by several kilograms. Treat the consensus range as a ballpark, not a prescription.
What is the Devine formula?
The Devine formula estimates ideal body weight from height: 50 kg + 2.3 kg per inch over 5 feet for men, and 45.5 kg + 2.3 kg per inch over 5 feet for women. It was originally developed for drug dosing, not fitness.
How is the healthy BMI range calculated?
A healthy BMI runs from 18.5 to 24.9. Multiply each bound by your height in meters squared: at 1.8 m, that is 18.5 × 3.24 ≈ 59.9 kg up to 24.9 × 3.24 ≈ 80.7 kg.
Do these formulas work for children or athletes?
No. They were developed for adults and ignore age, body composition, and muscle mass — a muscular athlete can be perfectly healthy well above every formula's number.
Is this medical advice?
No. These are estimates for education only — not medical advice. Talk to a healthcare professional about a healthy weight for your body.
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