BMI Calculator
Calculate your Body Mass Index and see your health category.
Key Features
- Calculate your Body Mass Index instantly using metric or imperial measurements.
- Displays your BMI alongside the standard WHO classification.
- Shows where your BMI falls on a visual scale for easy interpretation.
- Supports both kilograms/centimetres and pounds/feet inputs.
- Includes context noting limitations of BMI as a health metric.
- Instant results with no form submission or account required.
Frequently Asked Questions
What is a healthy BMI range?
The WHO defines a healthy BMI as 18.5–24.9. Below 18.5 is underweight, 25–29.9 is overweight and 30 or above is classified as obese.
Is BMI an accurate measure of health?
BMI is a useful population-level screening tool but does not account for muscle mass, bone density, age, sex or fat distribution — factors that significantly affect health.
How is BMI calculated?
BMI = weight (kg) ÷ height² (m²). In imperial units: BMI = (weight in pounds × 703) ÷ height² (inches²).