CalcQuick · BMI
Adult BMI Calculator
BMI is a simple screening ratio for adults. It does not directly measure body fat or diagnose health, but it can provide a common reference point.
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How to use this calculator
- Enter your values using the units shown.
- Review the result, which updates instantly.
- Check the formula and assumptions before using the number for a decision.
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Formula and assumptions
Metric: BMI = kilograms ÷ meters². US customary: BMI ≈ 703 × pounds ÷ total inches².
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Worked example
A person who weighs 70 kg and is 1.75 m tall has a BMI of 70 ÷ (1.75²) = 22.9.
CalcQuick
Sources and scope
These references support the formula or category guidance. CalcQuick remains responsible for the calculator implementation.
- Obesity and overweight: adult BMI screening categoriesWorld Health Organization
- Adult BMI Calculator and CategoriesU.S. Centers for Disease Control and Prevention
FAQ
Frequently asked questions
What is considered a healthy adult BMI?
Standard adult screening ranges define 18.5 to 24.9 as healthy weight, but an individual assessment needs more than BMI alone.
Does BMI measure body fat?
No. BMI uses only height and weight, so it cannot distinguish fat, muscle, bone or fat distribution.
Can I calculate BMI with pounds, feet and inches?
Yes. Choose US customary units and enter weight in pounds plus height in feet and inches. The calculator converts the values before calculating BMI.