Healthy Weight CalculatorFree online fitness & health calculator — instant results, no sign-up
Weight range for a healthy BMI at your height.
For general information only. This is not medical advice, diagnosis, dosing guidance or a treatment recommendation. Talk to a doctor or other qualified health professional about your health, pregnancy, or diet.
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About the Healthy Weight Calculator
The Healthy Weight Calculator estimates the standard healthy adult body weight range for a given height based on Body Mass Index (BMI). It uses the widely recognized normal BMI boundaries of 18.5 and 25 to establish the lower and upper weight thresholds in kilograms. Anyone looking to set a baseline weight target can use this tool to see where their height falls within standard adult classifications.
- Height
- Your stature measured in centimeters (cm), typically between 120 cm and 230 cm for adults.
Formula and method
Lower Bound (kg) = 18.5 × (h / 100)² Upper Bound (kg) = 25 × (h / 100)²
- hHeight in centimeters
- mHeight converted to meters (h / 100)
The calculator converts height from centimeters to meters by dividing by 100. It then multiplies the square of that height by 18.5 to find the minimum healthy weight and by 25 to find the maximum healthy weight. Both values are rounded to one decimal place.
Worked example
These are the calculator's starting values and the results it actually produces for them.
Inputs
- Height175 cm
Results
- Healthy range56.7 – 76.6 kg
How to use the Healthy Weight Calculator
- 1Divide your height in centimeters by 100 to convert it into meters.
- 2Square your height in meters (multiply it by itself).
- 3Multiply the squared height by 18.5 to calculate the lower bound of the healthy weight range.
- 4Multiply the squared height by 25 to calculate the upper bound, rounding both figures to one decimal place.
Reading your result
A weight between the lower and upper bounds corresponds to a standard BMI between 18.5 and 25.0 kg/m². Weighing less than the lower bound falls into the underweight category, while weighing more than the upper bound falls into the overweight category according to standard adult BMI tables.
Limitations
This calculator relies strictly on standard BMI cutoffs, which do not distinguish between fat mass, bone density, and lean muscle tissue. It also does not account for age, sex, athletic training, pregnancy, or ethnic variations in body composition risks.
Common questions
Why does the calculation use 18.5 and 25 as the cutoff points?+
Major global health agencies define a standard normal adult BMI as spanning from 18.5 to 24.9 kg/m². This tool uses 18.5 as the bottom threshold and 25 as the starting boundary for the overweight tier.
Does this healthy weight range apply to children and teens?+
No. Pediatric growth charts interpret BMI using age- and sex-specific percentiles rather than fixed adult BMI cutoffs of 18.5 to 25.
Can someone outside this weight range still be healthy?+
Yes. Muscular individuals like athletes may weigh more than the upper threshold without excess body fat, while older adults or individuals with smaller frames might carry different risk profiles at identical weights.
Does the calculator save my information?+
Calculations run in your browser. While signed in, inputs and results are automatically recorded in account history; saving a result creates a separate saved record.
Further reading
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Results are estimates for informational purposes and are not financial, medical or legal advice.