About the Circle Area
Calculate the area of a circle from its radius.
Use consistent units for all dimensions. The resulting area or volume uses the corresponding squared or cubed unit.
Calculate the area of a circle from its radius.
Calculate the area of a circle from its radius.
Use consistent units for all dimensions. The resulting area or volume uses the corresponding squared or cubed unit.
| Radius | 5 |
| Area | 78.5398 |
The calculator applies the standard geometry formula to the example dimensions.
Try this example →Use the same unit system for all dimensions. Area is in square units and volume is in cubic units.
Yes. The calculator accepts numeric decimal values.
Yes. The formulas are standard formulas for the corresponding geometric shapes.