MEASURE ONCE. PLAN YOUR PURCHASE.
Trapezoid Area calculator.
Measure a surface with two parallel edges of different lengths.
Your inputs
Use measurements from your plan and properties from your chosen product. Any prefilled values are illustrative.
YOUR ESTIMATE
∑
A clear estimate starts here.
Enter your dimensions and product details to see the quantity and purchase breakdown.
Formula and assumptions
BEHIND THE NUMBERS
How this calculation works.
The two entered edges must be parallel; height is their perpendicular separation.
A = (edge A + edge B) × height / 2Calculated with normalised units
A worked example
Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.
- First parallel edge
- 4 m
- Second parallel edge
- 2 m
- Perpendicular separation
- 3 m
Trapezoidal area: 9 m²
Before you purchase
Use dimensions from your plan and properties from your chosen product. Any design spacing, section or fixing pattern must already be specified.
Method: dimensional arithmetic and user-supplied specifications. Software checks: 2026-10-04. Calculation and review policy.