Find the area (and perimeter) of any parallelogram instantly
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How it works
The area of a parallelogram equals its base multiplied by its perpendicular height — the shortest vertical distance between the two parallel bases, not the slant side length. The perimeter requires the side length: P = 2(b + s).
A parallelogram area calculator makes geometry quick and error-free. Simply enter the base length and the perpendicular height — the tool multiplies them instantly using the formula A = b × h. Optionally add the side length to get the perimeter too. Works in both metric (meters) and imperial (inches), with a live diagram so you always know which measurement is which.
Area = base × height, where height is the perpendicular distance between the two parallel sides — not the slant (side) length. For example, a parallelogram with a base of 10 m and a perpendicular height of 6 m has an area of 60 m².
The height is the shortest vertical distance between the two parallel bases. The side length is the actual length of the slanted edge. These are only equal when the shape is a rectangle. Using the slant side instead of the perpendicular height will give an incorrect (too large) area.
Perimeter = 2 × (base + side), where side is the length of one of the non-base sides. Because opposite sides of a parallelogram are equal, you only need one base measurement and one side measurement.
Yes. A rectangle is a parallelogram where all angles are 90°, and a rhombus is a parallelogram where all sides are equal. The same A = b × h formula applies to both, so this calculator works for any of these shapes.