BMI Calculator

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BMI Calculator Guide

Free BMI calculator to check your Body Mass Index. Calculate BMI using metric or imperial units. Get instant results with health category classification.

How it works
  1. Choose metric or imperial units.
  2. Enter height and weight.
  3. Calculate BMI.
  4. See category classification.
Key features/options
  • Both unit systemskg/cm or lbs/in.
  • CategoriesUnderweight through obesity ranges.
  • Standard formulaWeight over height squared.
  • InstantNo account.
Common uses
  • Health screening.
  • Weight tracking.
  • Fitness goals.
  • Education.
Privacy & features
  • Inputs not stored.
  • Free screening tool—not medical advice.
  • Metric and imperial.
FAQ

Healthy range?

Typically 18.5–24.9 for adults; varies by individual.

Athletes?

BMI ignores muscle mass; athletes may read high.

Saved?

No.