Bank and Loose Volume
Calculate the original in-ground volume and the expanded loose volume after applying soil swell.
Construction Planning Tool
Excavation Calculator
Estimate excavation volume, loose soil, material weight, truckloads, working time, and project costs for trenches, foundations, pits, pools, and construction sites.
Enter Excavation Details
Select a shape and enter the project dimensions.
Complete Project Estimate
What This Excavation Calculator Measures
The calculator provides more than a basic cubic volume. It helps estimate the material, transport, time, and budget required for an excavation project.
Excavated Soil Weight
Estimate the weight of excavated material using a customizable loose soil density.
Required Truckloads
Determine the approximate number of truck trips based on loose soil volume and truck capacity.
Estimated Work Time
Calculate operating hours based on the expected excavation productivity of your machinery.
Detailed Cost Breakdown
Review separate excavation, hauling, equipment, fixed, and total project costs.
Multiple Excavation Shapes
Calculate rectangular foundations, sloped trenches, circular pits, shafts, and similar excavations.
Simple Process
How the Excavation Calculator Works
1
Select the Excavation Shape
Choose a rectangular foundation, a trench with sloped sides, or a circular pit.
2
Enter Project Dimensions
Add the length, width, depth, diameter, or trench dimensions using your preferred measurement unit.
3
Adjust Soil Conditions
Enter soil swell, extra excavation allowance, material density, and truck capacity.
4
Add Local Project Rates
Enter excavation, hauling, machinery, permit, and other fixed costs for a localized estimate.
5
Calculate the Estimate
The tool calculates bank volume, loose volume, soil weight, truckloads, hours, and costs.
6
Review Before Construction
Use the results for early planning and confirm final quantities with a qualified contractor or engineer.
What Is Excavation Volume?
Excavation volume is the amount of soil, rock, or other material that must be removed from a construction area. It is normally measured in cubic meters, cubic feet, or cubic yards.
The in-ground quantity is commonly called bank volume. After excavation, the material becomes less compact and occupies more space. This expanded quantity is called loose volume.
- Foundation and basement excavations
- Utility, drainage, and pipeline trenches
- Swimming pools and landscaping projects
- Circular shafts, tanks, and structural pits
Important Factors Affecting Cost
Excavation prices can vary significantly between projects. The calculated result should be treated as a planning estimate rather than a contractor quotation.
- Soil type, rock content, and ground stability
- Excavator size and site access
- Hauling distance and disposal charges
- Shoring, dewatering, and safety requirements
- Utility relocation and permit requirements
- Labor rates and local environmental rules
Planning Reference
Typical Loose Soil Density and Swell Values
Actual values depend on moisture, compaction, particle size, and site conditions. Use project-specific testing whenever available.
| Material | Approximate Loose Density | Typical Swell | Planning Notes |
|---|---|---|---|
| Dry Sand | 1.4 to 1.6 t/m³ | 10% to 15% | Moisture can significantly increase weight. |
| Gravel | 1.5 to 1.8 t/m³ | 10% to 15% | Particle size affects void space and truck capacity. |
| Clay | 1.5 to 1.8 t/m³ | 20% to 40% | Wet clay may be heavier and difficult to handle. |
| Common Earth | 1.4 to 1.7 t/m³ | 15% to 30% | A general starting range for mixed soil. |
| Broken Rock | 1.6 to 2.0 t/m³ | 40% to 70% | Rock excavation may require specialized equipment. |
| Topsoil | 1.1 to 1.4 t/m³ | 15% to 25% | Organic content generally reduces density. |
Common Questions
Excavation Calculator FAQs
For a rectangular excavation, multiply length by width by
depth. For a circular excavation, multiply π by the square
of the radius and then multiply by depth. A sloped trench
uses the average of the top and bottom widths.
Bank volume is the volume of material before excavation.
Loose volume is the expanded volume after the material is
dug up and its compact structure is disturbed.
Common soil may swell by approximately 15% to 30%. Clay
and broken rock can swell more. Use a geotechnical report
or local contractor data for more accurate planning.
The calculator divides loose excavated volume by the truck's
volume capacity and rounds the result upward to the next
complete truckload.
You can include disposal and transport expenses in the
hauling rate or add them to the fixed-cost field. Local
landfill or clean-fill charges should be confirmed separately.
Yes. Select feet as the measurement unit and cubic yards
as the volume result unit. The tool converts all dimensions
before displaying the final result.
It is intended for preliminary planning and comparison.
Final bids should consider site surveys, soil testing,
underground utilities, safety systems, equipment access,
local regulations, and contractor quotations.