Calculate the area of a trapezoid using its two parallel sides and the perpendicular height. The formula is one half times the sum of the two parallel sides, called the bases, multiplied by the height, written as A equals one half times (a plus b) times h. For example, bases of 8 and 5 with a height of 4 give an area of 26 square units. A trapezoid, known as a trapezium in some countries, is a four sided shape with exactly one pair of parallel sides, and this shape appears in roofs, ramps, bridges, table tops and land parcels. Enter your three measurements in a consistent unit and the area returns in that unit squared. Everything is computed locally in your browser at full precision, so your numbers stay private, and you can copy the area result with a single click.
Add the two parallel sides, halve the total, then multiply by the height between them.
The parallel sides are the two that never meet, often the top and bottom, and the height is the perpendicular distance between them.
Yes. Trapezium is the common name outside North America for the same four-sided shape with one pair of parallel sides.
Calculate the area of a trapezoid using its two parallel sides and the perpendicular height. The formula is one half times the sum of the two parallel sides, called the bases, multiplied by the height, written as A equals one half times (a plus b) times h.
Yes. Trapezoid Area Calculator is completely free, with no sign-up and no usage limits.
Yes. Trapezoid Area Calculator runs in any modern web browser. There is nothing to download or install.
Yes. Trapezoid Area Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.