Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
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.
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.
Key differences
| Ellipse Calculator | Circle Calculator | |
|---|---|---|
| Category | Geometry | Geometry |
| Inputs required | 4 | 3 |
| Result | Ellipse property (square units) | Result (units) |
| What it does | 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. | 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. |