BMI Calculator

What is BMI and why does it matter?

BMI stands for Body Mass Index, a simple calculation that uses your height and weight to estimate body fat. Doctors use it as a quick screening tool to identify potential weight-related health risks. While it doesn't measure body fat directly, it helps you understand if you're in a healthy weight range for your height.

What is a healthy BMI range?

A healthy BMI typically falls between 18.5 and 24.9. Below 18.5 is considered underweight, 25 to 29.9 is overweight, and 30 or above is obese. However, BMI is just one indicator—muscle mass, age, and other factors also matter for overall health.

Is BMI accurate for everyone?

BMI works well for most adults but has limitations. Athletes with high muscle mass may show as overweight even though they're healthy. Older adults may have lower muscle mass, which can affect results. For children and teens, BMI is interpreted differently using age and gender-specific charts.

How often should I check my BMI?

Checking your BMI monthly is a good way to track changes over time. Remember that weight can fluctuate daily due to water retention, meals, and other factors. Focus on trends over weeks and months rather than day-to-day changes.

Should I use metric or imperial units?

Either works perfectly. The calculator automatically converts between feet/inches and centimeters for height, and pounds and kilograms for weight. Use whichever system you're most comfortable with—the results will be the same.