BMI Calculator
Check your Body Mass Index in metric (kg/cm) or imperial (lb/ft) units.
Quick answer: Free BMI calculator for metric and imperial units. See your Body Mass Index and healthy weight category instantly. Private — runs in your browser.
–Your BMI
How to use
- Open this page on any device — no signup needed.
- Fill in the fields above.
- Get your result instantly — nothing is uploaded.
About this tool
Body Mass Index (BMI) estimates body fat using weight and height: weight (kg) ÷ height² (m²), or 703 × lb ÷ in². The WHO categories are: under 18.5 underweight, 18.5–24.9 normal, 25–29.9 overweight, 30+ obese. BMI is a screening tool, not a diagnosis — athletes and older adults may need other measures.
FAQ
What is a healthy BMI?
18.5 to 24.9 is considered the healthy range for most adults.
Is BMI accurate for everyone?
It is a general screening tool. It can misclassify muscular athletes and is not used for children (who use age-and-sex percentiles).
Is my data saved?
No. Everything is calculated on your device.
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