The Area of a Trapezoid calculator computes 
the area of a trapezoid based on the measure of the the top (a) and bottom (b) sides and the height (h).
INSTRUCTIONS: Choose units and enter the following:
- (a) Top Length
- (b) Bottom Length
- (h) Vertical Distance between top and bottom
Trapezoid Area (A): The calculator returns the area (A) in square meters. However, this can be automatically converted to other area units via the pull-down menu.
The Math / Science
A trapezoid is a special case of a quadrilateral, four sided polygon, where two non-adjacent sides are parallel (see diagram).
The formula for the area of a trapezoid is:
where:
- A is the area of the trapezoid
- h is the height
- a is the length of one parallel side
- b is the length of the other parallel side
Trapezoid or trapezium, as it's known in the UK, is a quadrilateral with two parallel sides, shown as the top and bottom in this diagram. The height of a trapezoid (h) is the perpendicular distance between the two parallel sides.
A trapezoid volume is made of four trapezoids one the sides.
Trapezoid Calculators
- Area of a Trapezoid based on top, bottom and separation
- Area of a Trapezoid based on length of 4 sides
- Height of a Trapezoid
- Angles of a Trapezoid
