Calculate your Body Mass Index to check if your weight is healthy for your height. This BMI calculator for adults is used by doctors and fitness experts across the USA.
The BMI Calculator computes your Body Mass Index to check if your weight is healthy for your height. BMI is a simple screening tool used by doctors and fitness experts across the USA to assess weight status in adults. BMI does not measure body fat directly, but it correlates with health risks. For a healthy weight range, use our Ideal Weight Calculator.
Underweight: Below 18.5
Normal weight: 18.5 to 24.9
Overweight: 25.0 to 29.9
Obese: 30.0 and above
A person with height 170 cm and weight 70 kg has BMI = 24.2, which falls in the Normal weight category. For children aged 2-19, BMI interpretation differs by age and gender. Use our Kids BMI Calculator for accurate percentile results.
BMI is a general guideline and does not account for muscle mass, bone density, or body composition. Athletes may have high BMI but low body fat. For body fat percentage estimation, try our Body Fat Calculator. Always consult a healthcare professional for medical advice.
What is a normal BMI? Normal BMI range is 18.5 to 24.9 for adults.
Does BMI work for athletes? Athletes with high muscle mass may show higher BMI but still be healthy.
How accurate is BMI? BMI is a screening tool, not a diagnostic tool. Consult a doctor for full health assessment.