Can I use this calculator if I am outside the age range of 2 to 80?

The calculator is designed for ages 2 to 80; using it outside this range may not produce reliable ideal weight estimates based on the selected formulas.

Why do different formulas give different ideal weight results?

Each formula (Robinson, Miller, Devine, Hamwi) was developed using different historical data and assumptions, so they produce varying weight ranges for the same height and gender.

Is the ideal weight result a recommendation for how much I should weigh to look a certain way?

No, the ideal weight formulas were originally created to estimate medication dosages and classify athletes by body weight, not to determine visual appearance.

Does the healthy BMI range result match the formula results exactly?

The healthy BMI range typically spans a wider weight range than any single formula, providing a separate benchmark based on Body Mass Index standards.

Body Metrics & FitnessTool Review

Ideal Weight Calculator

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This free ideal weight calculator estimates ideal healthy bodyweight based on age, gender, and height based on severa...

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About this tool

What Ideal Weight Calculator does

The Ideal Weight Calculator estimates healthy body weight ranges by processing height, gender, and age through several recognized mathematical formulas. Users receive side-by-side results from Robinson, Miller, Devine, and Hamwi calculations, plus a healthy BMI range, delivering multiple reference points rather than a single number. The output includes weight in US, metric, or other units, allowing quick comparison of how different formulas assess the same physical attributes. The interface presents each formula’s result clearly, alongside explanatory text about the medical and sports origins of ideal body weight, helping users understand that the number estimates medication dosing and athletic classification rather than visual ideal. A link to related calculators for BMI, body fat, and calories extends the utility within a single fitness & health hub.

Step by step

How to use the Calculator.net Ideal Weight Calculator

1
Select your age from the age dropdown menu (ages 2 to 80).
2
Choose your gender (male or female) from the selection options.
3
Enter your height using feet and inches or centimeters.
4
View the side-by-side results showing ideal weight from Robinson, Miller, Devine, and Hamwi formulas.
5
Review the healthy BMI range displayed alongside the formula results for additional context.

Is it right for you

Best for

This option suits individuals seeking a quick, formula-based comparison of multiple ideal weight estimates without needing to manually calculate or remember different equations.

Limitations

Results are estimates and do not account for body fat percentage or muscle mass.
Ideal body weight is not a perfect measurement of health or visual appeal.
The tool provides formulas based on height, gender, and age only; it does not consider individual health conditions or fitness levels.

Questions

Ideal Weight Calculator FAQ

Can I use this calculator if I am outside the age range of 2 to 80?: The calculator is designed for ages 2 to 80; using it outside this range may not produce reliable ideal weight estimates based on the selected formulas.
Why do different formulas give different ideal weight results?: Each formula (Robinson, Miller, Devine, Hamwi) was developed using different historical data and assumptions, so they produce varying weight ranges for the same height and gender.
Is the ideal weight result a recommendation for how much I should weigh to look a certain way?: No, the ideal weight formulas were originally created to estimate medication dosages and classify athletes by body weight, not to determine visual appearance.
Does the healthy BMI range result match the formula results exactly?: The healthy BMI range typically spans a wider weight range than any single formula, providing a separate benchmark based on Body Mass Index standards.

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