Ellipse Area and Perimeter
Find ellipse area and approximate perimeter from its semiaxes.
Your numbers
Area
Inputs are semiaxes, half the full axis lengths. Perimeter is approximate.
Scenario comparison
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Formula
A=πab; perimeter uses Ramanujan’s second approximation.
Find ellipse area and approximate perimeter from its semiaxes.
Worked example
- First semiaxis (m)
- 3
- Second semiaxis (m)
- 2
- Area
- 18.8495559215 m²
- Approximate perimeter
- 15.8654395893 m
Scope and limitations
Inputs are semiaxes, half the full axis lengths. Perimeter is approximate.
Inputs are checked for missing values and allowed ranges. A result outside the finite numeric range is not displayed. Rounding affects display, while the calculation uses the model’s numeric precision.
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Formula version: 7dc2027a1e0e · Example checked: