Ideal Weight Calculator
Devine ideal body weight for your height, plus the healthy BMI weight range.
Quick answer
- Formula: Devine — Men: 50 kg + 2.3 kg per inch over 5 ft · Women: 45.5 kg + 2.3 kg per inch over 5 ft
- Worked example — Ideal weight (Devine): 75.0 kg (full example below).
Ideal Weight Calculator
| Ideal weight (Devine) | 75.0 kg |
| Healthy range — low (BMI 18.5) | 59.9 kg |
| Healthy range — high (BMI 24.9) | 80.7 kg |
For a man of 180 cm, the Devine ideal weight is about 75.0 kg, and the healthy BMI range spans 59.9 kg to 80.7 kg.
The Devine formula (1974), originally developed for drug dosing, estimates ideal body weight from height: 50 kg for a man (45.5 kg for a woman) at 5 feet tall, plus 2.3 kg for every additional inch. It remains widely used in clinical and nutrition settings as a quick reference weight.
Alongside the Devine figure, this calculator shows the weight range that corresponds to a BMI of 18.5–24.9 at your height — for most people the broader, more useful target. Both are estimates for general information, not medical advice.
The formula
Worked example
For a man of 180 cm, the Devine ideal weight is about 75.0 kg, and the healthy BMI range spans 59.9 kg to 80.7 kg.
The example is pre-loaded in the result panel — press Calculate with your own numbers to replace it.
Frequently asked questions
Should I aim exactly for the Devine weight?
No — it is a single reference point that ignores frame size and muscle mass. Anywhere inside the healthy BMI range is a reasonable target for most adults; very muscular people may sit healthily above it.
Why do other formulas (Robinson, Miller, Hamwi) give different numbers?
Each was fitted to different populations and purposes. For a 180 cm man they cluster within a few kilograms of each other — Devine sits in the middle and is the most commonly cited.
Category: Health & Fitness calculators
Sources & methodology
This calculator applies the formula shown on this page exactly as written, using the standard definitions for its inputs. Results are computed from the values you enter — no data is stored — and are rounded only for display.
Content last reviewed by CalcHub Editorial.
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