BMI Calculator
Calculate your Body Mass Index to understand where your weight falls on a healthy scale. Adjust your details below for an instant result.
Your Details
Enter your measurements below
Your Result
Based on your current details
Classification
Healthy Weight
Your BMI is within the healthy range. Keep maintaining a balanced diet and active lifestyle.
Ideal weight: 60–79 kgUnderstanding Your BMI
Body Mass Index (BMI) is a simple, widely used screening tool that estimates whether your weight is healthy for your height. Our free BMI calculator gives you an instant reading along with your weight classification and a healthy weight range so you know exactly where you stand.
BMI categories for adults
- Underweight: below 18.5
- Healthy weight: 18.5 – 24.9
- Overweight: 25.0 – 29.9
- Obese: 30.0 and above
How to use the BMI calculator
Select your gender, enter your height in centimetres, your weight in kilograms and your age, then press Calculate BMI. Your result updates instantly with a classification and an ideal weight range tailored to your height.
Frequently asked questions
What is a healthy BMI range?
For most adults a BMI between 18.5 and 24.9 is considered healthy. Below 18.5 is underweight and 25 or above is overweight.
How is BMI calculated?
BMI equals your weight in kilograms divided by your height in metres squared (kg/m²). FitCalc handles the maths for you.
Is BMI accurate for athletes?
BMI does not distinguish muscle from fat, so very muscular people may read high despite low body fat. Use it as a general guide alongside other measurements.