Ellipse Circumference Calculator
Calculate the perimeter of an ellipse using high-precision Ramanujan approximations. Simply enter the semi-major and semi-minor axes.
Ellipse Circumference
Calculate the perimeter of an ellipse using Ramanujan's approximation
The longest radius of the ellipse.
The shortest radius of the ellipse.
Circumference Result
Perimeter (C)
48.4422
Step-by-Step Breakdown
How to Use Ellipse Circumference Calculator in 3 Easy Steps
1
Step 1
Input semi-major axis A.
2
Step 2
Input semi-minor axis B.
3
Step 3
Get circumference and area.
Frequently Asked Questions
The semi-major axis (a) is half the longest diameter; the semi-minor axis (b) is half the shortest.