Trapezoid formulas
Area = (a + b) * h / 2, where a and b are the parallel sides and h is the height. The median (midsegment) is the average of the two parallel sides: (a + b) / 2.
Perimeter is the sum of all four sides.
Trapezoid Area Calculator
Calculate the area, perimeter, and median of a trapezoid from its parallel sides, height, and leg lengths.
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Geometry
Trapezoid area, perimeter, and median
The trapezoid area calculator finds the area, perimeter, and median of a trapezoid from its two parallel sides, height, and leg lengths.
Limitations
The height must be perpendicular to both parallel sides. For oblique measurements, convert to perpendicular height first.
Frequently asked questions
The line segment connecting the midpoints of the two non-parallel sides. Its length equals the average of the two parallel sides.
Yes. A rectangle is a trapezoid where both parallel sides are equal: area = a * h.
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