BMI calculator
BMI is your weight in kilograms divided by your height in metres squared: 70 kg at 1.75 m is 70 รท 1.75ยฒ = 22.9. Enter your weight and height in metric or imperial units to see your BMI, its WHO category and the healthy weight range for your height.
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- ๐ด Works offline
- โ Free, no sign-up, no watermark
How to use BMI Calculator
- Choose metric (kg, cm) or imperial (lb, ft, in).
- Enter your weight and height.
- Read your BMI, the WHO category and the healthy weight range for your height.
About BMI Calculator
The categories are the World Health Organization adult cut-offs. Some countries use lower cut-offs for people of Asian descent (for example 23 for overweight). The healthy weight range shown is the weight that gives a BMI of 18.5 to 24.9 at your height.
Is it private?
Yes. BMI Calculator runs entirely in your web browser. What you type is never sent to Nolo or anyone else, and the page cannot send it anywhere: its security policy only allows it to talk to nolotools.com, which has no place to receive data. Nothing is stored either: close the page and it is gone. How Nolo works.
Questions and answers
What is a healthy BMI?
For adults, the WHO calls 18.5 to 24.9 normal weight, 25 to 29.9 overweight and 30 or more obese. Below 18.5 is underweight.
How do I calculate BMI with pounds and inches?
Multiply your weight in pounds by 703 and divide by your height in inches squared. Nolo converts to kg and metres for an exact result.
Is BMI accurate?
It is a quick screening number, not a diagnosis. It can overstate fat in muscular people and understate it in older adults, and it does not show where fat is carried. Talk to a doctor for a proper assessment.
Can I use it for children?
No. Children and teenagers need BMI-for-age percentiles, which depend on age and sex. This calculator uses the adult categories.
Are my numbers sent anywhere?
No. Everything is calculated in your browser with JavaScript. Nothing you type is uploaded, stored on a server or tracked, and the calculator works offline once the page has loaded.