🏋️ Ideal Weight Calculator
Enter your height and gender to calculate your ideal body weight using three different formulas: Broca, Lorentz, and BMI-22 standard. See how your current weight compares.
BMI-22 Standard Weight
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Broca Formula
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Lorentz Formula
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BMI-22 Standard
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Difference from Current
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📐 Formulas
【Broca Formula】
Male: (Height - 100) × 0.9
Female: (Height - 100) × 0.85
【Lorentz Formula】
Male: Height - 100 - (Height - 150) / 4
Female: Height - 100 - (Height - 150) / 2
【BMI-22 Standard Weight】
Ideal Weight = 22 × Height (m)² (targets BMI 22, Asian normal midpoint)
💡 Examples
Example 1 – Male, 175cm
- Broca
- (175-100) × 0.9 = 67.5 kg
- Lorentz
- 175-100-(175-150)/4 = 68.75 kg
- BMI-22
- 22 × (1.75)² = 67.4 kg
Example 2 – Female, 162cm
- Broca
- (162-100) × 0.85 = 52.7 kg
- Lorentz
- 162-100-(162-150)/2 = 56.0 kg
- BMI-22
- 22 × (1.62)² = 57.8 kg
❓ Frequently Asked Questions
Ideal body weight (IBW) is the weight range considered healthy for a given height, gender, and body frame. It varies depending on the formula used, which is why this calculator shows results from three different methods.
Using the average of all three formulas provides a reliable target range. The BMI-22 standard is the most widely referenced in modern medicine, but individual body composition (muscle vs. fat) means results can vary.
The BMI-22 standard weight targets a BMI of 22, the midpoint of the Asian normal range. Formula: Ideal Weight (kg) = 22 × Height (m)². For the WHO normal range midpoint (BMI 21.7), use 21.7 × Height (m)².
Yes. The Broca and Lorentz formulas use different coefficients for males and females. At the same height, males typically have an ideal weight about 5–8 kg higher than females due to differences in bone density and muscle mass.
A balanced approach combining mindful eating and regular exercise is most effective. Cutting 500 calories per day leads to roughly 0.5 kg loss per week. A gradual timeline of 3–6 months is much healthier than crash dieting. Consult a doctor or dietitian for a personalized plan.