BMI calculator
Find adult BMI from your weight and height.
Formula
BMI = kg / m²
Weight: 154 lb · Height: 5 ft 9 in · BMI ≈ (154 lb × 0.45359237 kg/lb) ÷ ((5 ft × 12 in/ft + 9 in) × 0.0254 m/in)^2
How to use
- Enter weight.
- Enter height and units.
- Read BMI and its category.
Examples
- 70 kg and 175 cm: BMI ≈ 22.9.
Reference table
| Range | Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5 ≤ x < 25 | Healthy weight |
| 25 ≤ x < 30 | Overweight |
| 30 and above | Obesity |
Frequently asked questions
What is BMI?
Weight in kilograms divided by height in meters squared.
Who is this for?
Adults aged 20 or older; children need age-specific charts.
Does BMI diagnose health?
No. It is a screening measure and does not distinguish muscle from fat.
Sources
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