Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Geometry
Circle Calculator
Calculate any circle property — area, circumference, diameter, or radius — by entering any one known measurement. Useful for geometry class, construction planning, or any task involving circular shapes.
Fill in the required fields to see your result.
Geometry
Ellipse Calculator
Calculate the area, perimeter, and eccentricity of an ellipse from its semi-major and semi-minor axes. Ideal for geometry, astronomy (orbital shapes), and engineering applications involving oval cross-sections.
Fill in the required fields to see your result.
Key differences
| Circle Calculator | Ellipse Calculator | |
|---|---|---|
| Category | Geometry | Geometry |
| Inputs required | 3 | 4 |
| Result | Result (units) | Ellipse property (square units) |
| What it does | Calculate any circle property — area, circumference, diameter, or radius — by entering any one known measurement. Useful for geometry class, construction planning, or any task involving circular shapes. | Calculate the area, perimeter, and eccentricity of an ellipse from its semi-major and semi-minor axes. Ideal for geometry, astronomy (orbital shapes), and engineering applications involving oval cross-sections. |