Ideal Weight Calculator
Enter your height in metric (cm) or imperial (in) units and see the healthy weight range for your frame. The calculator blends the classic formulas with the BMI-based range so you get one clear target zone.
Ideal weight
Find a healthy target weight range for your height.
FAQs
Which ideal weight formula is most accurate?
None is exact — Devine, Robinson, Miller, and Hamwi all estimate from height alone. The BMI-based range (18.5–24.9) is usually the most practical target because it gives a zone rather than a single number.
Can I use inches and pounds with this calculator?
Yes. Enter your height in inches and results are shown in pounds; use centimeters and results come out in kilograms. The formulas work the same in either system.
How it works
The classic Devine formula gives a single target: for men, 50 kg + 2.3 kg for each inch over 5 feet; for women, 45.5 kg + 2.3 kg per inch over 5 feet. A 5'6" (168 cm) man lands at about 65.9 kg.
The BMI-based approach gives a range instead: multiply your height in meters squared by 18.5 and by 24.9. For that same 168 cm person, the healthy range is roughly 52.2 kg to 70.3 kg.
The calculator shows both, so you get a formula target plus a realistic range. Treat the range as the goal — bodies differ in frame size and muscle, and anywhere inside 18.5–24.9 is a healthy landing zone.
There is no single "ideal" number
Every ideal-weight formula is a statistical estimate built from averages. Real bodies vary in bone structure, muscle, and proportions, so two people at the same height can be healthy at quite different weights.
That is why ranges beat targets. A 10–15 kg healthy band for a given height is more honest than a single decimal-point number.
Why the old formulas still get used
Formulas like Devine date back decades and were originally built for medicine dosing, not fitness goals. They survive because they are simple and roughly right for average frames.
The BMI range adds the missing piece — an upper and lower bound — so you can aim for a zone instead of chasing one magic number on the scale.
Turning a range into a plan
Pick the middle of the range as your first target, then reassess how you look, feel, and perform when you get there. You may find your personal sweet spot sits above or below the midpoint.
Move toward it gradually: a steady 0.5 kg per week beats aggressive cuts that cost you muscle. The range will still be there when you arrive — it is a destination, not a deadline.