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Trench Volume Calculator
Calculate excavation volume and spoil for a trench, including bulking.
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Trench volume
Compare Your Options And Get Clear Answers
Calculate excavation volume and spoil for a trench, including bulking.
Trench Volume Estimator
Enter your numbers below for an instant estimate.
0
💡 Tip: Volume = length x width x depth; spoil = volume x (1 + bulking).
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
Results update as you change the inputs.
3
Review
Read the breakdown and the explanation.
4
Adjust
Change values to compare scenarios.
Quick Reference Guide
Trench Quick Guide
Typical values for reference.
| Length | Width | Depth | Volume |
|---|---|---|---|
| 10 | 0.45 | 0.75 | 3.38 m3 |
| 20 | 0.6 | 1 | 12.00 m3 |
| 30 | 0.9 | 1.5 | 40.50 m3 |
| 50 | 1 | 2 | 100.00 m3 |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
Trench Volume Calculator FAQ
Answers to common questions about this calculator.
Multiply length, width and depth.
Soil expands once dug, so spoil takes up more space.
Support trenches deeper than 1.2 m.
Always, before digging.