Excavation Calculator
Calculates cubic yards of soil or rock to excavate. Includes equipment hours and disposal cost estimates for site prep.
Results
Cost Breakdown
Equipment productivity assumes a standard excavator at ~8-12 CY/hour. Actual rates vary by machine size, operator skill, and soil conditions.
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How to Use This Calculator
1. Select excavation shape. Rectangular for straight-sided digs. Sloped for cuts that need a safety angle (adds volume for 1:1 side slopes).
2. Enter dimensions and material type. Material type affects weight calculations for trucking and disposal.
3. Set equipment and disposal rates. Use local rates for accurate cost estimates.
How the Formula Works
Rectangular: CY = (L x W x D) / 27
Sloped: Top = Bottom + (2 x Depth)
Avg = (Bottom + Top) / 2
CY = (Avg_L x Avg_W x D) / 27
For sloped excavations, the calculator adds 1:1 slopes (45 degrees) to all four sides, which is the OSHA minimum for Type C soil. The top dimensions are larger than the bottom, creating a trapezoidal cross-section.
Frequently Asked Questions
How do I calculate cubic yards for excavation?
How many tons is a cubic yard of dirt?
How much does excavation cost?
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