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Healthy Weight Range Calculator

Find the healthy weight range for your height based on normal BMI (18.5–24.9).

Units

Result

Healthy Weight Range
55.2–74.3 kg
In Pounds
121.7–163.8 lb
806040200Weight (kg): 55Weight (kg): 74Low End (BMI 18.5)High End (BMI 24.9)

About the Healthy Weight

Instead of a single 'ideal' number, a healthy weight range based on BMI gives a more realistic target - since a healthy weight genuinely varies across a range for any given height. Our Healthy Weight Range Calculator finds that full range from your height alone.

How It Works

The calculator finds the weight corresponding to a BMI of 18.5 (the low end of 'normal') and a BMI of 24.9 (the high end) at your specific height, giving the full weight range considered within the normal BMI category.

Low weight = 18.5 × height(m)² High weight = 24.9 × height(m)²

Formula & Methodology

This is standard BMI algebra rearranged and solved for weight instead of BMI - since BMI = weight ÷ height², multiplying both sides by height² gives weight = BMI × height². Plugging in the two boundary BMI values (18.5 and 24.9) at a fixed height finds the exact weight range that would produce a 'normal' BMI for that specific height.

Step-by-Step: Calculating It By Hand

  1. 1Convert height to meters and square it.
  2. 2Multiply the squared height by 18.5 to find the low end of the healthy weight range.
  3. 3Multiply the squared height by 24.9 to find the high end of the healthy weight range.

Examples

Average height

A 5'8" person has a healthy weight range of roughly 121-163 lb under standard BMI category boundaries.

Taller height

A 6'0" person's range shifts notably higher, roughly 140-189 lb - showing how much height affects the healthy range for the same BMI boundaries.

Advantages

  • Gives a full range rather than one arbitrary 'ideal' number
  • Based on the same widely used BMI category boundaries clinicians reference
  • Shows results in both kilograms and pounds for convenience
  • More realistic than a single-point target for most people's use

Common Mistakes

  • Treating the low end of the range as automatically 'better' than the high end
  • Not accounting for BMI's known limitations for muscular or very lean individuals
  • Using this range as a strict target rather than a general reference point
  • Ignoring that healthy weight also depends on factors BMI doesn't capture, like body composition and overall health markers

Edge Cases to Watch For

  • Because weight scales with the square of height in this formula, the range widens more than proportionally for taller people compared to shorter people.
  • This range inherits every limitation of BMI itself - it doesn't account for muscle mass, frame size, or body composition, and can misclassify very muscular or very lean individuals.
  • The 18.5 and 24.9 boundaries are general adult population thresholds and aren't adjusted for age or ethnicity, even though health risk at a given BMI has been shown to vary across those groups.
  • This range applies to adults - children and teenagers use age- and sex-specific percentile growth charts instead of fixed BMI boundaries.

Common Use Cases

  • Finding a general healthy weight range for a given height
  • Setting a realistic weight goal range rather than one specific number
  • Understanding how the standard BMI category boundaries translate into actual weight
  • General health reference alongside other fitness metrics
Written & fact-checked by the Calculateus TeamLast updated August 5, 2026How we verify our formulas

Frequently asked questions

Why is there a range instead of one target number?

"Normal" BMI itself spans 18.5–24.9, so any weight within that range at your height counts as healthy by this measure - there's no single "correct" weight.

Related calculators

BMI CalculatorCalculate your Body Mass Index (BMI) and see which weight category you fall into.BMI Prime CalculatorCalculate BMI Prime - the ratio of your BMI to the upper limit of normal BMI (25).Calorie CalculatorEstimate your daily calorie needs to maintain, lose or gain weight.BMR CalculatorCalculate your Basal Metabolic Rate - calories burned at complete rest.

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Conclusion

A range is a more honest reflection of 'healthy' than a single number could ever be - and even this range has limits for muscular or very lean individuals. Pair it with our BMI Calculator to see exactly where your current weight falls within it.

References