How it works
Find ellipse area using its two semiaxes. Each semiaxis is half of the full width in that direction.
A = πab
Worked example
Show example inputs and result
Semiaxis a: 6 · Semiaxis b: 4.
- Area
- 75.39822369
Questions and answers
Why are some results rounded?
Results display up to 8 decimal places. Calculations use the unrounded values; very small values use scientific notation. JavaScript floating-point arithmetic can introduce tiny rounding differences.
Are my inputs sent to a server?
The calculator processes inputs in your browser. Its code does not send your values to a server.
Method reviewed: October 8, 2026 · Methods & accuracy