Healthy Weight Calculator
Enter your height to see the healthy weight range that corresponds to a BMI of 18.5 to 24.9.
Example
For a height of 1.70 m (170 cm):
Lower: 18.5 x 1.70^2 = 18.5 x 2.89 = 53.5 kg (117.9 lb)
Upper: 24.9 x 1.70^2 = 24.9 x 2.89 = 72.0 kg (158.6 lb)
Healthy range: 53.5 - 72.0 kg
How it works
The range is computed as BMI x height(m)^2 for the lower (18.5) and upper (24.9) healthy BMI limits. Switch units to enter height in cm or ft/in and read results in kg and lb.
Good to know
The Healthy Weight Calculator turns a single height measurement into the span of body weights that fall inside the World Health Organization's healthy BMI band of 18.5 to 24.9. Instead of telling you whether a known weight is "healthy," it works the other way around: you give it your height in centimetres or feet and inches, and it returns the lowest and highest weights that would keep your BMI in the recommended zone, displayed in both kilograms and pounds.
It is useful when you want a concrete target to aim for rather than a single ideal number, for example when setting a weight-loss or weight-gain goal, sanity-checking a plan, or simply seeing how much natural variation is normal for someone your height. Because every output updates the instant you change a field, you can also test "what if" heights for growing teenagers or compare yourself against a slightly different measurement.
Read the result as a window, not a finish line. Any weight between the lower and upper figures corresponds to a healthy BMI, so there is no single "correct" point inside that range. The lower bound comes from BMI 18.5 and the upper from 24.9, and the math is simply BMI multiplied by your height in metres squared, then converted to pounds.
Keep one caveat in mind: BMI is a population-level screen and ignores muscle mass, frame size, age, and body composition, so very muscular or very lean people can land outside the band while still being healthy. Measure your height without shoes for the most accurate result, and treat the range as a general reference rather than a diagnosis.
Frequently asked questions
Which BMI range does this calculator use?
It uses the World Health Organization's healthy weight band, a BMI of 18.5 (lower bound) to 24.9 (upper bound), multiplied by your height in metres squared to give the weight range.
Why is the result a range instead of one number?
A single height maps to many healthy weights. Any weight whose BMI falls between 18.5 and 24.9 is considered healthy, so the tool reports the low and high ends of that band.
Is my data uploaded anywhere?
No — this calculator runs entirely in your browser; nothing is uploaded.
Is this a substitute for medical advice?
No. These are educational estimates — consult a qualified health professional for medical decisions.
People also ask
What is a healthy weight for my height?
A healthy weight is any weight that puts your BMI between 18.5 and 24.9 for your height. For example, at 170 cm the healthy range is roughly 53.5 to 72.0 kg (118 to 159 lb), and the range scales up or down as height changes.
How do I calculate healthy weight from height?
Multiply 18.5 by your height in metres squared to get the lower limit, and 24.9 by your height in metres squared to get the upper limit. The two results form the healthy weight range in kilograms, which can then be converted to pounds.
Is BMI an accurate measure of healthy weight?
BMI is a quick screening tool that works reasonably well for many adults, but it does not distinguish muscle from fat or account for frame size, age, or sex. Athletes and very muscular people may register as overweight, while some people in the normal range may still carry excess body fat.
What is the difference between this and a regular BMI calculator?
A BMI calculator takes your height and weight and returns a single BMI number. This tool reverses that: it takes only height and returns the weight range that would fall within the healthy BMI band.
Does a healthy weight range differ for men and women?
The WHO healthy BMI band of 18.5 to 24.9 is the same for adult men and women, so this calculator produces an identical range for a given height regardless of sex. Differences in typical body composition between individuals are not captured by BMI alone.
Should I weigh myself at the bottom or top of the range?
There is no single best point; any weight within the range corresponds to a healthy BMI. Where an individual feels and functions best within that span depends on body composition and other factors, which BMI does not measure.
Does this healthy weight range apply to children and teenagers?
The fixed 18.5 to 24.9 adult band does not apply to children and teens, whose healthy weight is assessed using age- and sex-specific BMI percentile charts. This calculator is intended as a general adult reference.
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