Enter your height and weight to calculate your BMI and see your health category in seconds. Supports Imperial and Metric units.
This free BMI calculator lets you calculate your Body Mass Index instantly using either Imperial (feet and pounds) or Metric (centimeters and kilograms) measurements. BMI is a widely used screening tool that estimates whether your weight is in a healthy range for your height.
A BMI under 18.5 is considered underweight. Between 18.5 and 24.9 is the healthy range. A BMI of 25–29.9 is classified as overweight, and 30 or above is classified as obese, which carries increased risk for conditions like type 2 diabetes and heart disease.
BMI does not directly measure body fat and may not be accurate for athletes, elderly individuals, or certain ethnicities. Use it as one data point alongside other health markers. Always consult a healthcare provider for a complete assessment.
What is a healthy BMI range?
A BMI between 18.5 and 24.9 is considered healthy for most adults. Under 18.5 is underweight, 25–29.9 is overweight, and 30 or above is obese.
Is BMI accurate for everyone?
BMI is a general screening tool with limitations. Muscular athletes may score high without excess fat. It's best used alongside other health indicators like waist circumference and body fat percentage.
Does this BMI calculator work for children?
No. This calculator is for adults 18 and older. Children require age and sex-specific percentile charts.
What units does this BMI calculator support?
Both Imperial (feet, pounds) and Metric (centimeters, kilograms). Use the toggle at the top to switch between them.