Circle Area Calculator
The Circle Area Calculator helps you find the area of a circle using either the radius or diameter. This calculator is commonly used in math, geometry, construction, landscaping, and land measurement where circular shapes are involved.
Area: —
Related Calculators
Frequently Asked Questions
What is the formula for the area of a circle?
The area of a circle is calculated using the formula π × r², where r is the radius of the circle.
Can I use diameter instead of radius?
Yes. The calculator can convert diameter to radius automatically before calculating the area.
What units does this calculator support?
The result is returned in square units based on the unit you enter for the radius or diameter.