Parallelogram Area Calculator

About this calculator

This calculator finds the area of a parallelogram by multiplying its base by its (perpendicular) height — the same base-times-height logic as a rectangle, since any parallelogram can be cut and rearranged into a rectangle of the same base and height without changing its area. It's important to use the perpendicular height rather than the length of the slanted side, which is a common source of error.

The formula comes up in geometry coursework as one of the standard area formulas alongside the triangle and trapezoid, and in practical settings like flooring, tiling and land measurement where a plot or panel isn't a perfect rectangle but has parallel sides at an angle, so the straightforward length-times-width calculation doesn't apply directly.