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Trapezoid Area Calculator
Find a trapezoid area from its parallel sides and height.
Average the parallel sides
A trapezoid has two parallel sides of different lengths, and its area is simply their average multiplied by the height between them. This calculator applies that directly.
A trapezoid with parallel sides of 8 and 5 and a height of 4 has an area of 26. Enter your own measurements for the exact area.
Simple and private
The calculation runs in your browser, so nothing you enter is uploaded.
Frequently Asked Questions
What is the formula?
The area is the average of the two parallel sides times the height between them.
Which sides do I use?
The two parallel sides, often called the bases, plus the perpendicular height between them.
What units?
Any consistent unit; the area comes out in square units.
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