Ideal Body Weight Calculator

Use this ideal body weight calculator for an approximate adult fitness calculation. Choose US units for pounds, inches or yards, or switch to metric. Results are estimates, not medical or training prescriptions.

Your Numbers

Sex

Heightcm

Results

Devine Formula—

Robinson Formula—

Miller Formula—

Hamwi Formula—

Input check—

Results update live as you type. Estimates only — not financial, tax, or investment advice.

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The Formula

Devine: Men = 50 + 2.3 × (inches over 5 ft); Women = 45.5 + 2.3 × (inches over 5 ft)

Understanding the Ideal Body Weight Calculator

Worked example: At 180 cm (70.9 in), the male Devine equation gives about 75.0 kg (165.4 lb). Other historical formulas give different results.

These historical height-based formulas are not individualized ideal-weight targets. This implementation applies only at heights of at least 60 inches; it does not extrapolate below that range.

Frequently Asked Questions

How is the result calculated?

Devine: Men = 50 + 2.3 × (inches over 5 ft); Women = 45.5 + 2.3 × (inches over 5 ft)

What should I know about this estimate?

These historical height-based formulas are not individualized ideal-weight targets. This implementation applies only at heights of at least 60 inches; it does not extrapolate below that range.