BMI Calculator
Calculate your Body Mass Index and see the healthy weight range for your height.
The BMI Calculator computes your Body Mass Index from weight and height and places it in the standard categories: underweight, healthy weight, overweight and obese. It also shows the healthy weight range for your exact height (the BMI 18.5–24.9 band converted to kilograms), which is the figure most people actually plan around.
BMI = weight ÷ height². It is the most widely used population screening tool because it needs only two measurements, and it correlates well with health risk across large groups. That strength is also its limitation: BMI cannot distinguish muscle from fat, so athletes and very muscular people can score high while carrying little fat, and it says nothing about where fat is stored.
The result is an educational estimate, not a diagnosis. For a fuller picture pair it with waist-based measures — the Waist-to-Height or Waist-to-Hip calculators in this collection. Everything runs locally in your browser.
Your BMI
22.86
70 kg at 175 cm
Category
Healthy weight
Healthy weight range
56.66 – 76.26 kg
BMI 18.5–24.9
BMI = weight ÷ height². It is a quick population screening tool, not a diagnosis — athletes with high muscle mass can score high without excess fat, and distribution matters too. Waist-based tools give a more complete picture.
How to use the BMI Calculator
- Enter your weight in kilograms.
- Enter your height in centimeters.
- Read your BMI and its category instantly.
- Check the healthy weight range for your height.
- Use the note below to interpret the number with appropriate caveats.
Frequently asked questions
How do I calculate my BMI?
Divide your weight in kilograms by your height in meters squared: BMI = kg ÷ (m × m). A 70 kg person at 1.75 m has a BMI of 70 ÷ 3.06 = 22.9, which is within the healthy 18.5–24.9 range.
What are the BMI categories?
Under 18.5 is underweight, 18.5–24.9 is healthy weight, 25–29.9 is overweight, and 30+ is obese. These WHO cut-offs describe population risk — individual assessment should also consider muscle mass, age and fat distribution.
Is BMI accurate for athletes?
BMI can overestimate fatness in muscular people, because it treats all mass the same. A bodybuilder may have a BMI of 30 with very low body fat. If you train heavily, waist circumference or body-fat methods are more meaningful for you.
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