Is this ideal body weight calculator free to use?

Yes, completely free. No signup, no login, no payment ever.

Do I need to create an account?

No account needed. Open the tool, enter your height, and calculate immediately.

Everything runs in your browser. Your height and gender are never uploaded to our servers.

Which formula is most accurate?

There is no single best formula — Devine is the most commonly cited in medicine, but Robinson, Miller, and Hamwi can differ by several pounds or kilograms. Showing all four plus an average gives you a realistic range rather than one number.

Why do the formulas give different results?

Each formula was derived from different datasets and uses different constants. Devine and Robinson tend to land lower; Hamwi often runs higher. The spread between them is normal — treat the range as context.

Does this work for athletes or muscular builds?

These formulas estimate weight for an average frame and do not account for muscle mass. Athletes and lifters often weigh above the ideal range while maintaining low body fat — pair this with a body fat calculator or BMI for a fuller picture.

How is the average calculated?

It is the simple mean of the four formula results in kilograms, then converted to your display unit. It is a midpoint across methods, not a medically endorsed target.

Free Ideal Body Weight Calculator

A free ideal body weight calculator estimates how much you might weigh at a healthy size from your height and gender. It runs four standard formulas — Devine, Robinson, Miller, and Hamwi — side by side, shows a comparison table, and highlights the average with the full range across methods. Switch between metric (cm) and imperial (ft/in), no signup, runs in your browser.

Wondering what you "should" weigh for your height? Enter your gender and height to see ideal body weight estimates from four widely used clinical formulas: Devine, Robinson, Miller, and Hamwi. Each formula gives a slightly different number — the tool shows them in a comparison table plus an average estimate and the min–max range so you get context instead of a single arbitrary target. Toggle metric (centimeters) or imperial (feet and inches). All math runs locally in your browser — free, no signup, nothing uploaded.

Ideal body weight formulas are population estimates from height and gender — they do not account for muscle mass, frame size, or age. Use the range and average as context alongside BMI and body composition, not as a strict target. Not medical advice.

Runs 100% in your browser. Your data never leaves your device.

Implements four classic ideal body weight formulas in plain JavaScript. Height is converted to inches internally; Devine, Robinson, and Miller return kilograms directly while Hamwi returns pounds and is converted. The tool computes min, max, and mean across all four results and displays weights in your chosen unit. All calculations run locally in your browser with no external libraries or server calls.

How to Use Ideal Body Weight Calculator

Select your gender and choose metric (cm) or imperial (ft/in) units
Enter your height
Click Calculate to see ideal weight estimates from four formulas
Review the comparison table, average estimate, and overall range

When Would You Use This?

People searching alongside BMI or TDEE often want a weight target, not just a ratio. This tool answers "how much should I weigh?" with four established formulas instead of one — useful because no single formula fits everyone.

Someone setting a long-term goal might compare the average to their current weight and feed that into a calorie deficit calculator. Athletes with above-average muscle mass should treat these numbers as rough context — ideal weight formulas assume average frame and composition, so lifters often weigh more than the range suggests while still being healthy.

These are population estimates, not prescriptions. Use the range as a ballpark alongside BMI, body fat percentage, and how you actually look and feel.

Frequently Asked Questions

Is this ideal body weight calculator free to use?: Yes, completely free. No signup, no login, no payment ever.
Do I need to create an account?: No account needed. Open the tool, enter your height, and calculate immediately.
Is my data safe?: Everything runs in your browser. Your height and gender are never uploaded to our servers.
Which formula is most accurate?: There is no single best formula — Devine is the most commonly cited in medicine, but Robinson, Miller, and Hamwi can differ by several pounds or kilograms. Showing all four plus an average gives you a realistic range rather than one number.
Why do the formulas give different results?: Each formula was derived from different datasets and uses different constants. Devine and Robinson tend to land lower; Hamwi often runs higher. The spread between them is normal — treat the range as context.
Does this work for athletes or muscular builds?: These formulas estimate weight for an average frame and do not account for muscle mass. Athletes and lifters often weigh above the ideal range while maintaining low body fat — pair this with a body fat calculator or BMI for a fuller picture.
How is the average calculated?: It is the simple mean of the four formula results in kilograms, then converted to your display unit. It is a midpoint across methods, not a medically endorsed target.

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How to Use Ideal Body Weight Calculator

When Would You Use This?

Frequently Asked Questions

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