Parallelogram Area Calculator
Calculate a parallelogram's area from base and height, or from two sides and their angle.
Area
24
Area = base × height. A base of 6 and height of 4 give 24 square units.
How it works
A parallelogram's area is base times height — the same as a rectangle, because you could slide the slanted part across to square it off. The height must be the perpendicular distance, not the slanted side.
When you do not know the height but do know two sides and the angle between them, there is a second route: multiply the sides together and by the sine of the angle. The tool offers both.
Pick whichever inputs you have and read off the area, whether you are working from a scale drawing, a survey, or a geometry problem.
Frequently asked questions
How do you find the area of a parallelogram?
Multiply the base by the perpendicular height. If you have two sides and the included angle instead, multiply the sides and the sine of the angle.
Why can't I use the slanted side as the height?
The height must be measured straight across between the two parallel sides. The slanted side is longer, so using it would overstate the area.
What is the side-angle method?
If you know two adjacent sides and the angle between them, the area is side a times side b times the sine of that angle — handy when a perpendicular height is not given.