BMI calculator
Calculate BMI (body mass index) using the WHO formula. Check whether you are underweight, normal, overweight or obese. Free BMI calculator.
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Calculator · Health
Ideal Body Weight Calculator
Enter your height, sex and choose a formula — the calculator returns ideal body weight and a healthy range.
How we calculate
Devine: men 50+2.3×(height−152.4)/2.54; women 45.5+2.3×(height−152.4)/2.54. Broca: men=height(cm)−100; women=height(cm)−105.
Example: male, 175 cm, Devine
Ideal weight (Devine) = 50 + 2.3 × (175−152.4)/2.54 ≈ 70.5 kg. Range ±10%: 63.5–77.5 kg.
Frequently asked questions
What is the Devine formula?
Men: 50 + 2.3×(height−60in). Women: 45.5 + 2.3×(height−60in). Originally for drug dosing.
What is the Broca formula?
Men: height(cm) − 100. Women: height(cm) − 105. Simple but less precise.
Which formula is most accurate?
No formula is definitively "best". Devine is widely used medically; Hamwi is popular in nutrition.
Is ideal body weight the same as healthy BMI weight?
Similar but not identical. Ideal weight formulas target a specific number; healthy BMI covers a range (18.5–25).
Does muscle mass affect ideal weight?
Yes — athletes with high muscle mass may be "overweight" by these formulas but perfectly healthy.
What is the ±10% range?
A commonly accepted healthy weight range around the ideal. Being within this range is generally considered normal.
Does age affect ideal weight?
These formulas do not account for age. Older adults often have slightly higher acceptable weight ranges.
What if my weight differs significantly from ideal?
Consult a doctor or dietitian. Gradual weight change (0.5–1 kg/week) is generally safe and sustainable.
Is ideal weight the same for tall and short people?
No — formulas scale with height. Tall people have higher ideal weights.
Can I use this calculator for children?
No — these formulas are for adults. Children use different growth charts (centile charts).
Indicative result
For informational purposes. Consult a doctor for medical advice.
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