Health & Fitness Toolideal weight calculatorUpdated 2026

Ideal Body Weight (IBW) Calculator

Compare ideal weight formulas (Devine, Robinson, Miller, and Hamwi equations) suited to your biological height and frame.

Height & Biological Sex

cm
Ideal Body Weight (Consensus Average)
70.0 kg
Cross-validated across 4 clinical formulas
Devine Formula
70.5 kg
Robinson Formula
68.9 kg
Miller Formula
68.7 kg
Hamwi Formula
72.0 kg
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How Ideal Weight Works: Mathematical Formula & Steps

Clinical benchmark established by Dr. Ben Devine in 1974 for pharmacokinetics, calculating expected healthy lean mass based on skeletal height.

Devine & Robinson Ideal Body Weight (IBW) Equations
Devine (Men): 50 kg + 2.3 kg × (Height in inches − 60) | Women: 45.5 kg + 2.3 kg × (Inches − 60)
Where:
  • Base Weight (5-Foot Base): 50 kg for men, 45.5 kg for women at 5 feet (60 inches).
  • Height Offset (Inches over 5 ft): Each inch over 60 inches adds 2.3 kg (5.07 lbs).

Worked Real-World Example: Step-by-Step Calculation

To illustrate how the ideal weight calculator works in practice, consider the following real scenario:

Ideal Weight for a 5-Foot 10-Inch (70 inches) Male

Scenario: Height is 70 inches (10 inches over 5 feet).

Step 1: Identify inches over 60
70 − 60 = 10 inches
Step 2: Multiply by Devine coefficient
10 × 2.3 kg = 23 kg
Step 3: Add base weight
50 kg + 23 kg = 73.0 kg (160.9 lbs)
Final Result: His Devine ideal body weight is 73.0 kg (161 lbs), comparing favorably with Robinson (72.6 kg) and Miller (71.8 kg).

Key Takeaways & Best Practices

  • Ideal weight formulas provide clinical reference ranges, not rigid maximums.
  • Muscular athletes naturally exceed formula weights while maintaining optimal health.

International & Multi-Currency Standards

Whether you are evaluating calculations in the United States (USD), United Kingdom (GBP), Eurozone (EUR), South Africa (ZAR), Australia (AUD), Canada (CAD), or India (INR), everycalculator dynamically formats outputs according to regional accounting notations and dual metric/imperial conversions.

Related Search Terms & Common Queries

This calculator is designed to provide immediate answers for popular search queries including:

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Frequently Asked Questions

Why do different ideal weight formulas give different results?

Formulas like Devine, Robinson, Miller, and Hamwi were developed across different medical eras and study cohorts. Modern consensus evaluates ideal weight as a healthy BMI range (18.5 to 24.9) rather than a single number.

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