Health risk is lowest for most adults when BMI is between 18.5 and 25. Turning that into a weight range for your height gives a practical target that allows for differences in frame size and muscle.
How to use the Healthy Weight Calculator
- Height
Results update as you type, and every field accepts the units shown in its menu.
How it works
Enter your height. The calculator multiplies the BMI limits by your height in metres squared.
BMI categories
| BMI (kg/m²) | Category (WHO) | BMI Prime |
|---|---|---|
| Below 18.5 | Underweight | below 0.74 |
| 18.5–24.9 | Healthy weight | 0.74–0.99 |
| 25–29.9 | Overweight | 1.00–1.19 |
| 30–34.9 | Obesity class I | 1.20–1.39 |
| 35–39.9 | Obesity class II | 1.40–1.59 |
| 40 and above | Obesity class III | 1.60 and above |
What each result means
- Healthy weight from = 18.5×([Height]÷100)^2
- Healthy weight to = 25×([Height]÷100)^2
- Weight at BMI 30 (obesity) = 30×([Height]÷100)^2
- Asian cut-offs – healthy to (BMI 23) = 23×([Height]÷100)^2
Health note: this calculator is for education and screening only and is not a diagnosis or treatment advice. Discuss your results with a qualified clinician.
Formula
Healthy weight = 18.5 × height (m)² to 25 × height (m)²
Worked example
Inputs — Height: 175 cm.
Results — Healthy weight from = 56.7 kg; Healthy weight to = 76.6 kg; Weight at BMI 30 (obesity) = 91.9 kg; Asian cut-offs – healthy to (BMI 23) = 70.4 kg.
Key terms
- Healthy weight range
- The weights that give BMI 18.5–25 at a given height.
Frequently asked questions
Is the healthy range the same for everyone?
It is the same for adult men and women; many Asian countries use 23 as the upper limit.
Can I be healthy outside this range?
Some muscular people are; waist size and blood tests add context.
Does this apply to children?
No – children use BMI-for-age percentiles.