Healthy Weight Calculator — Find Your BMI-Based Weight Range
Enter your height to see the weight range corresponding to the standard BMI band of 18.5 to 24.9 — a quick, widely used reference range shown in both kilograms and pounds.
📏 Enter Your Details
Max (kg) = 24.9 × Height(m)²
📊 Your Healthy Weight Range
Disclaimer: This tool is for general educational and fitness-tracking purposes only and is not medical advice. The BMI-based range doesn't account for muscle mass, frame size, age, or individual health conditions. Consult a doctor or registered dietitian for a personal weight assessment or before starting any weight management plan.
How the Healthy Weight Range Is Calculated
This calculator works backward from the standard Body Mass Index formula. BMI is defined as weight in kilograms divided by height in metres squared, and a BMI between 18.5 and 24.9 is classified as the "normal weight" band by WHO and most health authorities worldwide. Rearranging that formula to solve for weight at each boundary gives a weight range for any given height:
Min Weight (kg) = 18.5 × Height(m)²
Max Weight (kg) = 24.9 × Height(m)²
Worked Example
For someone 170 cm (1.70 m) tall:
- Minimum: 18.5 × 1.70² = 18.5 × 2.89 = 53.47 kg (≈ 117.9 lbs)
- Maximum: 24.9 × 1.70² = 24.9 × 2.89 = 71.96 kg (≈ 158.6 lbs)
So a 170cm-tall adult falls within the standard healthy weight band anywhere between roughly 53.5 kg and 72.0 kg.
Why the Range Is So Wide
An 18-kg-plus spread might look imprecise, but that's intentional — BMI is a population-level screening tool, not a personalized target. Two people at the same height can have very different muscle mass, bone density, and body composition while landing at completely different points within this same "healthy" range, and both may be perfectly healthy. Use the range as a general reference, not a strict goal.