EVERYDAY PLANNING · VERSION 1.0.0

Trapezoid Area Calculator

Calculate the area and midline of a trapezoid with parallel sides.

Instant calculationCompare five scenariosJSON + CSV exports

Your inputs

Calculation results

Formula & assumptions

Area = (a + b)h/2.

Values use the specified units. Calculations use floating-point arithmetic. Check input measurements and formula assumptions before applying the result.

Compare your scenarios

Save up to five results to compare changes side by side. Scenarios stay in this tab until you clear or reload it.

Using Trapezoid Area Calculator

Calculate the area and midline of a trapezoid with parallel sides.

Enter first parallel side, second parallel side, perpendicular height using the units printed under each field.
Choose Calculate, or enable live updates. Review the result labels and formula assumptions.
Save scenarios to compare up to five variations, then copy the report or download JSON or CSV.

Example

First parallel side: 12 cm
Second parallel side: 8 cm
Perpendicular height: 5 cm
Area · cm²: 50
Midline · cm: 10

Questions & answers

What does Trapezoid Area Calculator calculate?

Calculate the area and midline of a trapezoid with parallel sides.

Which units should I enter?

First parallel side uses cm. Second parallel side uses cm. Perpendicular height uses cm. Convert values to these units before calculating.

Which formula does it use?

Area = (a + b)h/2.

What does the included example show?

First parallel side: 12 cm; Second parallel side: 8 cm; Perpendicular height: 5 cm. Result: Area · cm² = 50; Midline · cm = 10.

Can I compare different settings?

Yes. Save a scenario, change the inputs and save another result. Up to five scenarios are compared in this tab; they disappear when you reload or leave.

Can I export the calculation?

Copy the JSON report or download JSON and CSV with inputs, result labels and numeric values. Processing uses local JavaScript; no calculation request is sent to our server. Displayed values use up to 10 significant digits; exports retain JavaScript numeric precision.