BMI Calculator
Calculate your Body Mass Index (BMI) to find out whether your weight falls within a healthy range. Simply enter your height and weight below.
BMI Categories
What is BMI?
Body Mass Index (BMI) is a simple measurement that uses your height and weight to estimate whether you are at a healthy weight. It is calculated by dividing your weight in kilograms by your height in meters squared.
How is BMI calculated?
The formula is: BMI = weight (kg) / height (m)²
For example, if you weigh 70 kg and are 1.75 m tall:
BMI = 70 / (1.75 × 1.75) = 70 / 3.0625 = 22.9 (Normal weight)
BMI Categories
The World Health Organization (WHO) defines the following BMI categories for adults:
- Underweight: BMI below 18.5
- Normal weight: BMI 18.5 to 24.9
- Overweight: BMI 25.0 to 29.9
- Obese: BMI 30.0 or higher
Limitations of BMI
While BMI is a useful screening tool, it does not directly measure body fat. Athletes with high muscle mass may have a high BMI despite having low body fat. Conversely, older adults who have lost muscle may have a normal BMI but carry excess fat. For a more complete picture, consider using our Body Fat Calculator as well.
What should I do with my BMI result?
Your BMI is a starting point for understanding your health. If your BMI is outside the normal range, consider consulting with a healthcare professional. A balanced diet and regular exercise are key to maintaining a healthy weight. Foodplaner can help you create personalized meal plans to reach your goals — sign up for free to get started.