BMI Calculator
Wondering if your weight is in a healthy range? Our BMI calculator gives you a quick answer. Just enter your height and weight, and you'll know your Body Mass Index in seconds.
What Is
BMI (Body Mass Index) is a simple measure that uses your height and weight to estimate body fat. It's a screening tool — not a diagnostic — that helps identify potential weight-related health risks.
How to Use
- Select metric (kg/cm) or imperial (lbs/ft) units
- Enter your height
- Enter your weight
- Click Calculate to see your BMI
- Check which category you fall into: underweight, normal, overweight, or obese
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Frequently Asked Questions
What is a healthy BMI range?
A BMI between 18.5 and 24.9 is considered normal. Below 18.5 is underweight, 25-29.9 is overweight, and 30+ is obese.
Is BMI accurate for athletes?
BMI can overestimate body fat in muscular people and underestimate it in older adults who've lost muscle.
Does BMI apply to children?
Yes, but percentiles based on age and gender are used instead of fixed ranges.
What should I do if my BMI is high?
Talk to your doctor. A balanced diet and regular exercise can help manage weight.
Can BMI change with age?
Yes, as body composition changes. Muscle mass tends to decrease with age, which can affect BMI.