Ellipse Area
An ellipse can be viewed as a circle stretched independently along two perpendicular axes.
Ellipse Area
Curves · 2 inputs
How to use this calculator
- Enter semi-major axis in cm.
- Enter semi-minor axis in cm.
- Select Calculate and keep the output unit with the answer.
Before you use the answer
Start with a dimensioned sketch and label the units beside every measurement. Distinguish the outer edge from an internal opening, and distinguish a radius from a diameter. A geometric model is most useful when the shape actually matches the assumptions in the formula.
Enter semi-axes measured from centre to edge, not the full width and height.
Does it save my inputs?
No calculation history is stored by this website. The calculator works locally in your browser. See the privacy policy for hosting and contact details.
Why might a result be approximate?
Measurement uncertainty, ideal-model assumptions and floating-point rounding can all matter. Displaying more digits does not improve the original measurement.
Related calculations
Ellipse Perimeter Estimate
Ramanujan's first perimeter approximation gives a convenient estimate without evaluating an elliptic integral.
Open calculator ↗Sector Area
A sector is a fraction of a circle selected by its central angle.
Open calculator ↗Arc Length
Arc length measures the curved boundary selected by a central angle.
Open calculator ↗