BMI Calculator
Created by a developer who needed simple tools
Calculate your Body Mass Index (BMI) to assess your weight category.
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BMI Range
Underweight
Normal
Overweight
Obese
<18.5
18.5-25
25-30
>30
What is BMI?
Body Mass Index (BMI) is a measure of body fat based on height and weight. It's used to screen for weight categories that may lead to health problems.
BMI Categories
- Underweight: BMI less than 18.5
- Normal weight: BMI 18.5 to 24.9
- Overweight: BMI 25 to 29.9
- Obese: BMI 30 or greater
How to Calculate BMI
Metric formula: weight (kg) ÷ height² (m²)
Imperial formula: weight (lbs) × 703 ÷ height² (in²)
Limitations of BMI
- Does not distinguish between muscle and fat
- Athletes may have high BMI but low body fat
- Elderly may have normal BMI but low muscle mass
- Not accurate for pregnant women
Frequently Asked Questions
What is a healthy BMI?
A healthy BMI range is 18.5 to 24.9.
Is BMI accurate for everyone?
No, BMI is a screening tool, not a diagnostic tool. Consult a doctor for health assessment.
What if my BMI is overweight or obese?
Consider consulting a healthcare provider for personalized advice on diet and exercise.
Can children use this calculator?
BMI for children uses percentiles. This calculator is designed for adults 18+.