The Linear Eccentricity of an Ellipse calculator computes the linear eccentricity (f) of an ellipse which is the distance between the center point of the ellipse and either foci (F1 and F2). For the CLICK HERE.,
INSTRUCTIONS: Choose units and enter the following;
Linear eccentricity of the ellipse (f): The calculator returns the value in meters. However, this can be automatically converted into numerous other length units (e.g. feet or inches) via the pull-down menu.
Here's a visual representation of the creation of an ellipse:
As the representation shows you need something like a string that is attached to two fixed points. The moving black point can be your pen stretching the sting as it moves around the ellipse. The two fixed green points are actually the foci of the ellipse and so the line drawn through the two fixed points and which intersects the ellipse at both extremes is the major axis of the ellipse.