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Ideal Weight Calculator

Find your ideal body weight using the Devine, Robinson, Miller, and Hamwi formulas. Includes a healthy BMI weight range and comparison cards.

Health

Unit System

Gender

Height (cm)

About These Formulas

Ideal body weight formulas provide an estimate of what a person at a given height might weigh at an optimal body composition. They are used in clinical settings for medication dosing, nutritional assessment, and as general health benchmarks.

Important: These formulas do not account for muscle mass, bone density, body fat distribution, or frame size. Use them as a general reference rather than a strict target.

The healthy BMI range (18.5-24.9) provides a broader, evidence-based healthy weight zone. Most ideal weight formulas fall within this range for average builds.

Frequently Asked Questions

Which formula is most accurate?▾

No single formula is universally "most accurate" since individual body composition varies widely. The Devine formula is most commonly used in clinical settings for medication dosing. The Miller formula was derived from larger actuarial datasets. Take the average across all four as a reasonable estimate for most people.

What is the difference between ideal weight and healthy weight?▾

"Ideal weight" is a specific number from a formula, while "healthy weight" is the full BMI range (18.5-24.9) considered healthy for a given height. The healthy BMI range accounts for natural variation in body types and is generally preferred over formula-based ideal weights.

Do these formulas work for athletes or muscular people?▾

No. These formulas do not account for muscle mass. Athletes with high muscle mass may weigh more than these formulas suggest while having very low body fat. Body fat percentage is a better metric for athletes than weight-based formulas.

Can I use this to set weight loss goals?▾

Yes, but use the healthy BMI range as your primary guide rather than a specific formula number. Aim to stay within the healthy range for your height, and focus on body composition rather than just the number on the scale.

Why do the formulas give different results?▾

Each formula was developed using different populations and methodologies. Devine used pharmaceutical data, Miller used life insurance records, Hamwi and Robinson used clinical data from different eras. The differences reflect varying assumptions about ideal body composition at the time each was created.

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How to Use This Tool

Select your gender and preferred unit system (metric or imperial).
Enter your height. Use cm for metric or feet/inches for imperial.
View your ideal weight calculated using four clinical formulas: Devine, Robinson, Miller, and Hamwi.
Compare the results across methods with the visual comparison cards.
See the average ideal weight and the healthy BMI weight range for your height.
Use the FAQ section to learn about the differences between each formula.

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