iSolveTo ← Construction & Engineering
🏗️ Category 09 · Tool 41

Trench Excavation Calculator

Estimate trench excavation volume including a simple trapezoidal side-slope model.

Free calculatorConstruction & EngineeringReference estimate

Calculator inputs

All dimensional inputs on this calculator use the selected unit. Results are converted to SI for consistency.
Enter a positive value.
Enter a positive value.
Enter a positive value.
Enter a positive value.
Enter a positive value.

Result

Result
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Important: Choose the unit shown above; do not mix feet, meters, inches or other units within a dimensional set. Trench cross-section uses a trapezoid; swell is then added. This calculator is for general planning/reference only. It does not replace project-specific engineering design, applicable local codes, manufacturer data, site investigation, or qualified professional review.

How to use this calculator

What to enter

Enter or select the following as requested: Dimension unit; Trench length; Top width; Bottom width; Depth; Swell allowance (%). Follow the units, valid ranges, examples, and options displayed beside each field.

What the result means

The construction result estimates a material quantity, dimension, load, or structural response from the measurements and assumptions entered. Check dimensions, unit conversions, material density, waste allowance, soil/site conditions, load combinations, and local code requirements.

When to use it

Use this for preliminary quantity takeoffs or to check a construction calculation. Verify structural and safety-critical work with qualified professionals and applicable building codes before ordering materials or building.