Math & Statistics
Ellipse Perimeter Calculator
Estimate the perimeter of an ellipse using Ramanujan's approximation.
Your inputs
Change any value to update the result instantly.
Perimeter (Ramanujan approx.)
25.527
Area
47.1239
Eccentricity
0.8
Formula and working
P ≈ π[3(a+b) − √((3a+b)(a+3b))]
- 1
Collect the inputs
Semi-major axis a = 5; Semi-minor axis b = 3
- 2
Apply the formula
P ≈ π[3(a+b) − √((3a+b)(a+3b))]
- 3
Result
Perimeter (Ramanujan approx.) = 25.527
Frequently asked questions
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
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