Ideal Weight Calculator
This calculator estimates an ideal body weight range using your height and gender, based on the Devine formula — one of the most widely referenced ideal-weight equations in clinical and fitness settings.
Fill in the form and select Calculate to see your result here.
What is Ideal Weight?
"Ideal weight" is a population-level reference point derived from height alone — it does not account for muscle mass, frame size or body composition, so it is best treated as a rough anchor rather than a personal target.
Ideal Weight Formula
This calculator uses the Devine formula, originally developed for medical dosing calculations in the 1970s and since adopted widely as a simple ideal-weight reference. It starts from a baseline weight at 5 feet (152.4 cm) and adds a fixed amount per inch of height above that.
Men: Ideal Weight (kg) = 50 + 2.3 × (height in inches − 60) Women: Ideal Weight (kg) = 45.5 + 2.3 × (height in inches − 60)
Ideal Weight Example
A 170 cm (66.9 inch) male: 66.9 − 60 = 6.9 inches over 5 feet, so ideal weight = 50 + (2.3 × 6.9) ≈ 65.9 kg.
How to Use This Calculator
- Select your gender.
- Enter your height in centimetres.
- Select "Calculate" to see your estimated ideal weight.
- Use the Body Fat and Lean Body Mass calculators alongside this for a fuller picture of body composition.
Limitations
- The Devine formula was designed for medication dosing, not fitness or aesthetics — it says nothing about muscle mass, frame size or body fat distribution.
- Other formulas (Robinson, Miller, Hamwi) give slightly different results for the same height — no single equation is "correct" for every individual.
- A healthy weight is best thought of as a range, not one fixed number, and varies with muscularity and frame.