HEALTH & FITNESS • FREE CALCULATOR

Body Mass Index Calculator

Calculate adult body mass index from height and weight, with an explanation of its screening limitations.

BMI
24.4898
Height
1.75 metres

How it works

BMI = weight in kg / height in metres squared.

Worked calculation

75 kg at 175 cm gives a BMI of about 24.49. For the sample inputs, the calculator displays these results:

BMI24.4898
Height1.75 metres

Assumptions and limitations

BMI is a screening measure, not a diagnosis, and has limitations for many individuals.

Results update as you change inputs. The values are calculated from the displayed inputs and assumptions, not obtained from an external measurement. Check units, rounding, and any special rules that apply to your situation.

Further reading and source context

For background and independently maintained guidance, see CDC adult BMI guidance. This source supplies context rather than personalized verification of the calculator output.

What this BMI estimate means

BMI is a screening ratio of body mass to height squared. For adults, it does not distinguish muscle from fat, describe fat distribution, or diagnose an illness. Use age-appropriate methods for children and teenagers.

How to use BMI responsibly

Use the result as one piece of context rather than a health verdict. People who are pregnant, very muscular, or experiencing medical changes may need different assessments.

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Frequently asked questions

What is a healthy BMI range?

For most adults, 18.5 to 24.9 is considered a healthy range, 25 to 29.9 overweight and 30 or more obesity.

Is BMI accurate for everyone?

No. It does not measure body fat or muscle, so it can be misleading for athletes, older adults and some ethnic groups. Children use age-based percentiles.

How is BMI calculated?

Weight in kilograms divided by height in metres squared.

Sources and further reading

Last updated: . Results are estimates for information only and are not financial, medical or professional advice.