Ideal Body Weight Calculator
Estimate your ideal body weight range from height and gender using standard medical formulas with this free calculator in your browser.
Enter details
Result
Fill in the fields to see your result.
Estimate only — not medical or nutritional advice. Individual needs vary; consult a professional before making big changes.
Before you rely on this: First-pass guide only. Verify safety-critical or regulated work against the relevant standards, your project requirements and a qualified professional.
How to use this calculator
- Enter sex and height.
- Pick a formula (Devine, Robinson, Miller or Hamwi).
- Read the ideal weight plus the healthy BMI range.
How it works
Classic IBW formulas add a per-inch amount above 5 ft to a base weight. The healthy range uses BMI 18.5–24.9 for your height.
Worked example
Man, 180 cm, Devine. ≈ 75 kg; healthy BMI range ≈ 60–81 kg.
Tips
- Estimate only — not medical or nutritional advice. Individual needs vary.
Frequently asked questions
Which formula is best?
They're all rough guides from different eras. The BMI healthy range is often more practical.
Privacy?
Runs entirely in your browser. Your inputs are not saved or transmitted.
Related tools
- BMI Calculator
- BMR Calculator
- Body Fat Percentage Range Calculator
- Waist-to-Height Ratio Calculator
- Calorie Deficit Calculator
- Weight Change Timeline Calculator
Explore more in Health, Fitness, Nutrition & Body.
Cite this tool
Zerdly. (2026). Ideal Body Weight Calculator. Retrieved from https://www.zerdly.com/tools/ideal-body-weight-calculator/
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.