Calculator Inputs
Example Data Table
| Item | Example Value | Unit |
|---|---|---|
| Pad length | 120 | ft |
| Pad width | 80 | ft |
| Finished grade | 100.00 | ft |
| Existing corner elevations | 102.10, 101.60, 99.40, 98.90 | ft |
| Topsoil stripping | 0.25 | ft |
| Swell and shrinkage | 15 and 10 | percent |
Formula Used
Area: Length × Width
Adjusted Existing Elevation: Existing Elevation − Topsoil Strip Depth
Depth Difference: Adjusted Existing Elevation − Finished Grade
Average Cut Depth: Sum of Positive Depths ÷ 4
Average Fill Depth: Sum of Negative Depths ÷ 4
Cut Volume: Area × Average Cut Depth ÷ 27
Fill Volume: Area × Average Fill Depth ÷ 27
Bank Material Needed For Fill: Compacted Fill ÷ (1 − Shrinkage)
Loose Haul: Bank Material × (1 + Swell)
Average End Area Volume: ((Area 1 + Area 2) ÷ 2) × Distance ÷ 27
How to Use This Calculator
- Enter the project name, pad length, and pad width.
- Add the proposed finished grade elevation.
- Enter the four existing corner elevations.
- Add topsoil stripping depth if the surface layer is removed.
- Enter swell and shrinkage percentages for the soil.
- Add unit rates for cut, fill, borrow, haul, waste, and stripping.
- Use the cross section fields for a corridor volume check.
- Press the calculate button to view results above the form.
- Use the CSV or PDF button to save the report.
Earthwork Quantity Planning
Earthwork Quantity Planning
Earthwork cut and fill planning compares existing ground with a proposed design surface. It helps a contractor know what must be removed, placed, hauled, borrowed, or wasted. Good estimates reduce surprises. They also support bids, schedules, truck planning, and field checks.
Why Cut and Fill Balance Matters
A balanced site uses most excavated material as compacted fill. This lowers hauling and borrow costs. Balance is not only raw volume. Soil swells when excavated. It shrinks when placed and compacted. Moisture, rock, topsoil, and unsuitable material can change the result. That is why this calculator separates bank cut, loose haul, compacted fill, borrow, waste, and stripping.
Measurement Method
The main panel uses a four point grid average. Enter the four existing corner elevations and one finished grade. The tool finds the cut or fill depth at each point. Positive differences become cut. Negative differences become fill. The average depth is multiplied by the pad area. Volumes are then converted to cubic yards. This method is useful for pads, yards, small lots, parking areas, and early estimates.
Optional Cross Section Check
The average end area section is useful for roads, channels, trenches, and long corridors. Enter cut and fill areas at two stations. Then enter the station spacing. The calculator averages the two areas and multiplies by distance. This gives a separate corridor volume. Use it as a check against the grid result.
Cost and Truck Planning
Rates help turn quantities into a working budget. You can enter excavation, fill placement, borrow, haul, disposal, and stripping rates. The tool also estimates truck loads from loose cubic yards. Add contingency for risk. Use higher contingency when survey data is sparse or soil conditions are unknown.
Field Notes
Every earthwork estimate should be reviewed with survey control, geotechnical notes, and project specifications. Remove topsoil and unsuitable material before using the balance. Check compaction requirements. Verify whether pay quantities use bank, loose, or compacted cubic yards. These units are different. Clear assumptions help owners, estimators, and site crews read the same number the same way. Use conservative rounding for bid reviews. Keep source data with each report. Recheck quantities after design changes. Small grade edits can move many yards very quickly today.
FAQs
What is cut in earthwork?
Cut is soil or rock removed from ground that is higher than the proposed finished grade. It is usually measured as bank cubic yards before excavation.
What is fill in earthwork?
Fill is material placed where existing ground is lower than the proposed grade. It is commonly measured as compacted cubic yards after placement and compaction.
Why does shrinkage matter?
Shrinkage matters because excavated soil often occupies less volume after it is placed and compacted. More bank material may be needed to create the required compacted fill.
Why does swell matter?
Swell matters because excavated material expands when loosened. Loose haul volume can be greater than bank cut volume. This affects trucks, haul cost, and stockpile planning.
What is topsoil stripping?
Topsoil stripping removes the organic surface layer before grading. It is usually tracked separately because it may not be suitable for structural fill.
What is the average end area method?
The average end area method averages two cross section areas and multiplies by the distance between them. It is common for roads, channels, and linear work.
Can this replace a survey?
No. This tool supports estimating and planning. Final quantities should use survey data, project drawings, soil reports, and contract measurement rules.
Why are bank, loose, and compacted yards different?
Bank yards are in-place ground volume. Loose yards are excavated and expanded volume. Compacted yards are placed and densified volume. Each unit serves a different job purpose.