How to Calculate Excavation
What is Excavation?
Excavation Volume Calculator helps contractors and tradespeople accurately size, spec, and estimate materials and systems.
Formula
Volume (cy) = Length × Width × Depth / 27
Step-by-Step Guide
- 1Measure excavation dimensions in feet, convert to cubic yards
- 2Apply the formula using your project measurements
- 3Add required safety factors or waste allowances per code
Worked Examples
Input
20 ft × 20 ft × 3 ft deep
Result
Volume = 20×20×3/27 = 44.4 cubic yards
Common Mistakes to Avoid
- ✕Not applying code-required safety factors or derating
- ✕Forgetting to account for waste and cut losses in material estimates
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