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Ideal Weight Calculator

Use your height and sex to compare several classic ideal-weight formulas and a healthy BMI-based range on one screen.

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Health use notice

This tool is for general reference only and does not replace medical, nutrition, diagnostic, or treatment advice. For health decisions, confirm the result with a clinician, registered specialist, or official guidance.

Formula average

70 kg

Healthy BMI range

56.7 kg - 76.3 kg

Adult reference

18+

Formula comparison

FormulaWeight
Robinson68.9 kg
Miller68.7 kg
Devine70.5 kg
Hamwi72 kg

How it works

Ideal weight is better treated as a reference range than as a single exact number. This tool compares several classic formulas and a BMI-based healthy range.

Calculation notes

  • Robinson, Miller, Devine, and Hamwi are shown side by side.
  • The healthy BMI range uses BMI 18.5 to 24.9 at your current height.
  • People under 18 should use age-specific growth guidance instead of adult formulas alone.

Frequently asked questions

Why do the formulas give different numbers?expand_more

Each formula was developed from a different population and time period, so the coefficients vary.

Why is age included?expand_more

Age helps frame the result as an adult reference and reminds younger users to rely on age-specific guidance.

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