Parallelogram Calculator
Calculate the area and perimeter of a parallelogram from its base, height, and side.
How it works
- 1Enter the base and the perpendicular height.
- 2Enter the slanted side length for the perimeter.
- 3Read the area (base × height) and perimeter 2 × (base + side).
Use cases
- Find the area of a slanted plot or panel.
- Estimate the perimeter for edging or framing.
- Check geometry homework on parallelograms.
Frequently asked questions
What is the area of a parallelogram?
Area = base × height, where height is the perpendicular distance between the base and the opposite side — not the slanted side length.
Why are base and side both needed?
The base × height gives the area, while the perimeter is 2 × (base + side). The slanted side differs from the height.
How is this different from a rectangle?
A rectangle is a parallelogram with right angles, so its side equals its height. A general parallelogram leans, so the side is longer than the height.
Related tools
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Calculate the area (Heron’s formula) and perimeter of a triangle from its three sides.
Calculate the area and perimeter of a trapezoid from its two parallel sides, height, and legs.