Free Online Calculators

Excavation Volume

Excavation Volume - Calculate construction and material requirements accurately.

Understanding Excavation

Excavation isn't just about digging a hole; it's about managing the dirt you remove. Soil expands when you dig it up ("swell") and shrinks when you pack it back down ("shrinkage").

The Swell Factor

When earth is in the ground, it is "Bank" volume. When you dig it up, it becomes "Loose" volume.

Bank Volume = Length × Width × Depth
Haul Volume = Bank Volume × (1 + Swell %)
Typical Swell: 20-30% for topsoil/clay.

This means if you dig a 10-yard hole, you might need a dump truck that can carry 13 yards to haul the dirt away!

Excavation Safety

Call Before You Dig

In the US, dial 811 a few days before digging.

  • Free service to mark utility lines.
  • Hitting a gas or power line can be fatal.

Trench Safety

Trenches deeper than 5 feet require protection.

  • Slope: Angle the walls back.
  • Shoring: Use supports to prevent collapse.

Frequently Asked Questions

How do I calculate the slope?

What is 'Over-excavation'?

How many dump trucks do I need?

What if I hit rock?

How to use the Excavation Volume

Follow these steps to get accurate results with the excavation volume.

  1. 1

    Enter your values

    Fill in the required input fields above. Units can be changed where available.

  2. 2

    Click Calculate

    Press the calculate button to compute results instantly in your browser.

  3. 3

    Review your results

    View the computed outputs and use related calculators for deeper analysis.

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