Health & Fitness
BMI Calculator - Calculate Body Mass Index
Free BMI calculator to find your body mass index and weight category.
Formulas and edge cases are reviewed against authoritative references before publication. For methodology, editorial standards, or corrections, use the links below.
Frequently asked questions
What is BMI?
BMI is a simple index based on height and weight that helps estimate healthy body weight ranges.
Is BMI accurate for athletes?
BMI does not distinguish between muscle and fat, so athletes may see higher values even with low body fat.
What is a normal BMI range?
A BMI between 18.5 and 24.9 is generally considered normal for adults.
Related tools
About this tool
Inputs
- Weight
- Height
Results
- Your BMI
- Category
Every calculation has variables — and getting even one wrong changes the outcome. The BMI Calculator keeps all variables in view so nothing slips through. Fill in weight and height and the tool handles the rest, showing you your bmi and category within moments. Tracking health indicators over time reveals trends that one-off measurements miss. Basal metabolic rate estimates use equations like Harris-Benedict or Mifflin-St Jeor, which factor in age, sex, height, and weight.
People frequently need to find your body mass index and weight category but lack a quick way to do it — this tool fills that gap. Use results as a conversation starter with a healthcare professional, not as a substitute for medical advice. BMI does not distinguish between muscle and fat, so athletes may see higher values even with low body fat. Reference ranges published by organizations like WHO and NIH apply to general adult populations and may not suit everyone. Use the result as a starting point for deeper analysis. Pair it with other tools for a more complete picture.