Ellipse Area 計算機

An ellipse is an oval shape defined by two radii: semi-major axis (a) and semi-minor axis (b). Area calculation is simpler than circumference, using a straightforward formula.

Enter semi-major axis a Then: Enter semi-minor axis b Then: Multiply π × a × b.

Example: Input a = 8 cm, b = 5 cm gives a result of Area ≈ 126 cm² (π × 8 × 5 ≈ 126).

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

Our Ellipse Area 計算機 uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.