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BMI Calculator

Work out your body mass index in metric or US units, with the healthy weight range for your height.

  • 100% free
  • Metric and US units
  • Healthy weight range

Units

cm
kg

Your BMI

22.9

Healthy weight

1518.5253040
Category
Healthy weight
Healthy weight for your height
56.7 kg – 76.3 kg
BMI 18.5 to 24.9

Calculation

BMI = weight (kg) ÷ height (m)²

  1. 70.0 ÷ 1.75² = 22.9

BMI is a quick screening number for adults. It doesn't tell muscle from fat, and different cut-offs apply to children, teenagers and some ethnic groups. Talk to a doctor about your own health.

Last reviewed by the OnlineToolPro team

What is the BMI Calculator?

BMI (body mass index) compares weight with height to give a quick screening number for adults. This calculator shows your BMI, the standard category it falls in, and the weight range that counts as healthy for your height.

How it works

How to use the BMI Calculator

3 simple steps. No experience needed.

What can you use it for?

  • Check where you are on the BMI scale.
  • Find a healthy target weight for your height.
  • Convert between kg, cm, pounds and feet.

How BMI is calculated

BMI is weight in kilograms divided by height in meters squared. For 70 kg and 1.75 m: 70 ÷ (1.75 × 1.75) = 22.9. US units are converted to metric first.

FAQ

Frequently asked questions

What is a healthy BMI?

For adults, 18.5 to 24.9. Below 18.5 is underweight, 25 to 29.9 overweight, and 30 or more is in the obesity range.

Is BMI accurate for everyone?

No. It doesn't separate muscle from fat, so very muscular people can score high. It's not used the same way for children and teenagers, and some health bodies use lower cut-offs for people of Asian descent.

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