ACAmerican Calculator

Home › Health & Fitness › BMI Calculator

Health & Fitness

BMI Calculator

Body Mass Index (BMI) estimates whether your weight is healthy for your height. Enter your height and weight below — the result and category update instantly.

RESULT
22.9
Body Mass Index
Healthy weight
Healthy BMI range is 18.5 – 24.9.
Formula
BMI = weight (kg) ÷ height (m)² · US: BMI = 703 × lb ÷ in²

Example: A person 175 cm tall weighing 70 kg has a BMI of 22.9 — a healthy weight.

ADVERTISEMENT

Related calculators

Calorie CalculatorHealth & Fitness

Frequently asked questions

What is a healthy BMI?

A BMI between 18.5 and 24.9 is considered a healthy weight for most adults. Below 18.5 is underweight, 25–29.9 is overweight, and 30 or above is obese.

How is BMI calculated?

BMI is your weight in kilograms divided by your height in meters squared. In US units, multiply your weight in pounds by 703, then divide by your height in inches squared.

Is BMI accurate for everyone?

BMI is a useful general screen but doesn't distinguish muscle from fat. Very muscular people may read as 'overweight'. Treat it as a starting point, not a diagnosis.