# Area of a circle

Find the area of a circle given its radius, diameter, or circumference.

If you're seeing this message, it means we're having trouble loading external resources for Khan Academy.

If you're behind a web filter, please make sure that the domains ***.kastatic.org** and ***.kasandbox.org** are unblocked.

Main content
# Area of a circle

### Problem

Find the area of a circle given its radius, diameter, or circumference.