Ellipse Calculator

Your details

Semi-axes are half the full lengths. Choose whichever you have measured.
Half the length of the longest axis of the ellipse.
Half the length of the shortest axis. Must be less than or equal to a.
AreaModerately elongated
47.1239

The surface enclosed by the ellipse (A = pi x a x b)

Perimeter25.527
Eccentricity (e)0.8
Focal distance (c)4
Latus rectum3.6
Focal parameter (p)1.8
Unitm
Area unitm^2
0.8 e
Near-circle<0.1Mildly elongated0.1-0.5Moderately elongated0.5-0.85Highly elongated0.85+

Eccentricity 0.800000 - a moderately elongated ellipse.

  • Area is 47.1239 m^2, calculated as pi x 5.0000 x 3.0000.
  • Perimeter (Ramanujan approximation) is 25.5270 m. This formula is accurate to within 0.0001% for all eccentricities.
  • Each focus lies 4.0000 m from the centre along the major axis.

Next stepUse the focal distance to locate the two foci of your ellipse on the major axis, symmetrically about the centre.

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