Calculate
Compare height-based formulas
IBWThe reference page compares several classic ideal-weight formulas. This version keeps those formula ranges, the healthy BMI band, and the explanation together in one live workspace.
Health directory
Open categoryThis calculator is part of the health section. Keep the current tool open for calculation, then use the related calculators below to compare nearby planning tasks.
Health calculator
Ideal Weight Calculator
Use a fuller ideal-weight calculator when you want to compare height-based weight formulas instead of relying on one random target number.
How to use this calculator
Ideal-weight guide
Ideal-weight formulas are reference tools, not strict prescriptions. They were developed in different eras and for different purposes, which is why they do not match perfectly. This page keeps that same formula-comparison idea from the reference calculator while showing the BMI healthy range and formula spread in a more unified layout.
- Use the formulas as a comparison set rather than assuming one line is the only correct body weight.
- Check the healthy BMI range alongside the named formulas so the result remains tied to height and context.
- Build, body composition, age, and training history can all make a reasonable personal target different from any single formula output.
Formula / method
Formula / method
This ideal weight calculator uses the existing ToolModule calculation model for the inputs shown above. The page keeps the original formulas and result logic intact, then presents the output in a clearer working layout.
- Start with the required inputs in the form above.
- The calculator applies the existing ToolModule calculation logic for this tool.
- Review the result cards, tables, and charts together before making a real-world decision.
Example calculation
Review the current live example
The example below reflects the current values shown in the calculator above, so it updates as you change the form without altering the calculation logic itself.
Example inputs
SexMale
Age30
Height (cm)178
Example outputs
Robinson formula71.1 kg
Miller formula70.4 kg
Devine formula73.2 kg
Hamwi formula75.2 kg
Disclaimer
Use results as planning guidance only
Results are for reference only and do not constitute medical, nutrition, or clinical advice. Use professional guidance when a health or treatment decision is involved.
- Do not treat calculator output as financial, investment, medical, or legal advice.
- Check assumptions, dates, tax rules, and provider-specific terms before acting on a result.
- Use official documents or professional guidance when the decision has material consequences.
FAQ
Common Ideal Weight questions
Why do ideal-weight formulas disagree?
They were built from different assumptions and population data, so a few kilograms of spread is common.
Is ideal weight the same as healthy weight?
Not exactly. Ideal-weight formulas are reference estimates, while healthy weight is broader and can depend on body composition, health status, and lifestyle.
Why does this page compare formulas live instead of giving one answer?
The reference calculator is most useful as a comparison tool. This version makes that comparison easier by keeping every formula visible in one live result set.