Trapezoidal Trench Volume calculator.
Measure an excavation with different top and bottom widths and supplied end sections.
Your inputs
Use measurements from your plan and properties from your chosen product. Any prefilled values are illustrative.
A clear estimate starts here.
Enter your dimensions and product details to see the quantity and purchase breakdown.
Formula and assumptions
How this calculation works.
Calculates measured geometry only. It does not choose side slopes, shoring, depth or excavation safety measures.
A worked example
Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.
- Bottom width
- 1 m
- Top width
- 2 m
- Measured depth
- 1 m
- Trench length
- 10 m
Trench volume: 15 m³
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.
Calculates measured geometry only. It does not choose side slopes, shoring, depth or excavation safety measures.
Method: dimensional arithmetic and user-supplied specifications. Software checks: 2026-10-04. Calculation and review policy.