Ideal Weight Calculator
Calculate ideal body weight (IBW) based on height, gender, and clinical formulas.
Input Parameters
Live Result
Details
Quick Answer & Understanding Your Result
Your Ideal Body Weight (IBW) represents the medically recommended weight range associated with the lowest mortality risk and optimal physiological health for your specific height and biological sex.
The 4 Major Clinical IBW Formulas
- Devine Formula (1974 - Global Medical Standard):
- Men: 50.0 kg + 2.3 kg × ( height in inches - 60)
- Women: 45.5 kg + 2.3 kg × ( height in inches - 60)
- Robinson Formula (1983): Popular modification providing slightly higher targets for tall individuals.
- Miller Formula (1983): Designed for athletic body frame adjustments.
- Hamwi Formula (1964): Fast rule-of-thumb formula widely used in dietetics.
Healthy BMI Weight Target (WHO)
- International Standard: Body weight that produces a BMI between 18.5 and 24.9 kg/m^2.
- Asian Population Standard: Body weight that produces a BMI between 18.5 and 22.9 kg/m^2.
Enter your height and biological sex above to view your comparative ideal weight targets across all clinical equations.
Formula & Calculation Logic
Mathematical FormulaCalculates ideal weight in kg based on height inches above 5 feet (60 inches).
Step-by-Step Guide
Select Biological Sex
Choose Male or Female (skeletal frame formulas differ).
Enter Standing Height
Input your height accurately in centimeters or feet/inches.
Review Clinical Formulas
Compare your results across Devine, Robinson, Miller, and Hamwi equations.
Check Healthy BMI Range
View the acceptable upper and lower healthy weight thresholds.
Worked Examples Table
| Example | Input Values | Calculated Result | Explanation |
|---|---|---|---|
| Male (175 cm / 5 ft 9 in) | Height is 68.9 inches (8.9 inches over 60). 50 + 2.3×8.9 = 70.5 kg. | ||
| Female (162 cm / 5 ft 4 in) | Height is 63.8 inches (3.8 inches over 60). 45.5 + 2.3×3.8 = 54.2 kg. |
Frequently Asked Questions
Evidence-Based Methodology & Authoritative References
Devine BJ. Gentamicin therapy. Drug Intell Clin Pharm. 1974
National Heart, Lung, and Blood Institute (NHLBI)
Standard: WHO Adult BMI Diagnostic Standard
Formula: Devine Men: IBW (kg) = 50.0 + 2.3 × (Height_in - 60)
Last Reviewed: August 21, 2026
Primary Source: Devine BJ. Gentamicin therapy. Drug Intell Clin Pharm. 1974
Reference Document: National Heart, Lung, and Blood Institute (NHLBI)
Computation Privacy: 100% client-side 0ms computation, zero data retention
Calculated health, metabolic, and biometric metrics are for general fitness and educational reference only. They do not substitute for professional medical advice, clinical diagnosis, or personalized treatment plans.
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Calculated results are modeled based on standard scientific and mathematical formulas. Please verify with domain-specific technical documentation for specialized applications.