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Weight Goals

Ideal Body Weight Calculator

Calculate your ideal weight based on your height using clinical formulas

Medical Reviewer
වෛද්‍ය තහවුරු කිරීම:
Dr. Priya Sammni, MBBS, DFM
යාවත්කාලීන කළේ: Mar 2026
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Average ideal weight (kg)

❓ Frequently Asked Questions

Which ideal weight formula is best?
No single formula is universally perfect. The Hamwi formula is widely used clinically (especially in pharmacy for drug dosing). The Peters/BMI-range method (18.5–24.9) is often more practical as a goal range rather than a fixed number.
Why do the formulas give different results?
Each formula was developed for different clinical purposes. Devine was originally for drug dosing, Robinson and Miller were developed from actuarial life insurance data, and Hamwi from clinical experience. They reflect different starting assumptions about body composition.
Should I aim for a specific ideal weight number?
Rather than a single number, aim for a weight range that corresponds to a healthy BMI (18.5–24.9). Individual variation is significant — a healthy body fat percentage matters more than a formula-derived weight target.
Does height affect metabolism?
Yes — taller people have higher BMR because they have more body mass (even at ideal weight) and greater surface area for heat loss. Height is factored into all BMR equations.

🔗 Related Calculators

⚖️ BMI Calculator 📏 Body Fat % 📉 Caloric Deficit 🔥 BMR Calculator

What Is Ideal Body Weight?

Ideal body weight (IBW) refers to the weight range associated with optimal health outcomes for a given height. Multiple clinical formulas have been developed over the decades — primarily for drug dosing and nutritional assessment in healthcare settings. Today, they serve as useful reference points for personal health goals.

The Four Main Formulas

  • Hamwi (1964): Men: 48 kg + 2.7 kg per inch above 5ft. Women: 45.4 kg + 2.25 kg per inch above 5ft. Widely used in clinical settings.
  • Devine (1974): Men: 50 + 2.3 kg per inch over 5ft. Women: 45.5 + 2.3 kg per inch over 5ft. Originally for drug dosing.
  • Robinson (1983): Men: 52 + 1.9 kg per inch over 5ft. Women: 49 + 1.7 kg per inch over 5ft. Based on Metropolitan Life Insurance data.
  • Miller (1983): Men: 56.2 + 1.41 kg per inch over 5ft. Women: 53.1 + 1.36 kg per inch over 5ft. Closer to the lower end of healthy BMI.
⚕️ Medical Disclaimer: Ideal body weight formulas are population estimates and may not reflect optimal weight for individuals with unusual body composition, muscle mass, or health conditions. A healthy BMI range (18.5–24.9) is generally the most useful practical goal.

📚 විද්‍යාත්මක මූලාශ්‍ර සහ සමීකරණ

  • J. D. Robinson et al. Determination of ideal body weight for drug dosage calculations (1983).
  • G. J. Miller et al. A proposed standard for ideal body weight (1983).
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