Ellipse Area Calculator
Your result47.12389 m²
Area = πab
Calculate ellipse area from its two semi-axis lengths.
Formula
Area = πab
Worked example
Semi-major axis: 5 m
Semi-minor axis: 3 m
With these inputs, the result is 47.1238898 m².
How to use this calculator
- Identify the quantity you want to calculate.
- Enter your measurements in the units shown on each field.
- Read the result, which updates as you change the inputs.
- Check the assumptions below before applying the result.
Assumptions and limits
Semi-axes are half the full width and height.
Precision and checking
Results are rounded for display. Use the most accurate measurements available, and avoid rounding your inputs unnecessarily. Extra decimal places in a result do not make an estimate more reliable.
To check a result, substitute the same input values into the formula shown above. Change one value at a time to understand how the quantity responds.
Frequently asked questions
What assumptions does this calculation use?
Semi-axes are half the full width and height.
Are my inputs sent to a server?
No. The calculation runs locally in your browser. The result updates as you edit the inputs.
