Concrete Trench Calculator
Estimate concrete volume, bag quantity, excavation footprint, placed weight and cost for one or more straight concrete-filled trenches.
Default project preview
1.81 yd³
Concrete bags
82
Base volume
1.65 yd³
Total trench length
40 ft
Excavation footprint
53.3 ft²
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Volume = trench length × width × concrete depth × quantity. The allowance is applied before converting to ready-mix volume or rounding bags up.
FAQ
Concrete Trench Calculator questions
Should trench dimensions be measured inside the excavation?+
Use the actual concrete dimensions. Excavation may be wider where forms, working room or unstable soil are involved.
Does the calculator include a gravel base?+
No. Base aggregate and drainage materials should be estimated separately.
Can this size a foundation trench?+
No. Width, depth and reinforcement must come from an approved project design.