Use this free online ideal weight calculator to estimate a reference body weight from height and sex using the Devine formula. Enter sex and height in centimeters. The result is shown in kilograms. No signup is required.
Ideal body weight formulas create a single reference point for height. They are not personal prescriptions and they ignore muscle mass, bone structure, and health history. Treat this ideal weight calculator output as an educational estimate, not a diagnosis.
Compare with BMI, body fat, calorie, and BMR tools in fitness and body.
What Devine ideal weight represents
The Devine method starts from a base weight at 60 inches of height, then adds weight for each inch above that height. Men and women use different bases. Multicalify converts your centimeter height into inches for the formula, then returns kilograms.
How to use the calculator
- Select sex.
- Enter height in centimeters.
- Read the estimated ideal weight in kilograms.
- Compare with BMI and body fat context before setting goals.
How the calculation works
Height inches = height in cm ÷ 2.54
Male IBW kg = 50 + 2.3 × max(0, inches − 60)
Female IBW kg = 45.5 + 2.3 × max(0, inches − 60)
Example: female, 165 cm. Inches ≈ 64.96. IBW ≈ 45.5 + 2.3 × 4.96 ≈ 56.9 kg.
| Input | Value |
|---|---|
| Sex | Female |
| Height | 165 cm |
| Inches | ~64.96 |
| Ideal weight | ~56.9 kg |
Ideal weight versus BMI and body fat
BMI categories use weight and height without naming an ideal kilogram target first. Body fat percent describes composition. Devine IBW is a legacy clinical style estimate still used as a reference in some calculations. Healthy individuals can sit above or below IBW.
Common mistakes
- Treating IBW as a mandatory goal weight
- Ignoring muscular athletes who outweigh IBW with low fat mass
- Entering height in inches into a centimeter field
- Using IBW alone without nutrition and medical context
Limitations
Devine is one formula among several. It may not fit every population. For medical or medication dosing questions, clinicians use protocols that this consumer tool does not implement.
Conclusion
An ideal weight calculator estimate gives a height based reference, not a verdict on your health. Use it beside BMI, body fat, and calorie tools, and seek professional guidance for personal targets.
Setting goals without overfixating one formula
If your current weight differs from IBW, decide whether composition, performance, or medical guidance drives the next step. Two people at the same IBW can look and perform differently. Strength training and protein intake often matter more than chasing the exact Devine number.
Revisit height if you measure yourself carefully once, then keep that height consistent across BMI and ideal weight runs for cleaner comparisons.