Cut and Fill Calculator

Calculator Inputs

Measurement unit

Grid rows

Grid columns

Cell length

Cell width

Topsoil strip depth

Swell percentage

Shrinkage percentage

Fill waste allowance

Truck capacity

Use yd³ for feet mode. Use m³ for meter mode.

Import material cost per volume unit

Haul cost per export truck

Include stripped topsoil as export volume

Existing elevations

Proposed elevations

Example Data Table

Setting	Example Value	Note
Grid size	3 rows by 3 columns	Use 9 existing and 9 proposed elevations.
Cell spacing	20 by 20 feet	Each grid cell covers 400 square feet.
Swell	15%	Bank cut expands after excavation.
Shrinkage	10%	Placed fill compacts after rolling.
Truck capacity	12 cubic yards	Used for haul load estimates.

Formula Used

Grade difference: Existing elevation − Proposed elevation.

Cut depth: Positive grade difference.

Fill depth: Absolute value of negative grade difference.

Weighted grid volume: Cell area ÷ 4 × weighted depth sum.

Bank material needed for fill: Design fill × waste factor ÷ shrinkage ratio.

Loose volume: Bank volume × swell ratio.

Net bank balance: Bank cut − bank material needed for fill.

Truckloads: Loose haul volume ÷ truck capacity, rounded upward.

How to Use This Calculator

Select feet or meters.
Enter grid rows and columns.
Enter the cell length and width.
Paste existing elevations in row order.
Paste proposed elevations in the same row order.
Add swell, shrinkage, waste, and stripping assumptions.
Enter truck and cost values.
Press calculate to review the result above the form.
Use CSV or PDF options to save the report.

What This Calculator Does

A cut and fill calculator estimates soil movement for grading work. It compares existing ground levels with proposed design levels. The tool separates excavation, fill, waste, import, export, and haul volume. It also adjusts volumes for swell, shrinkage, compaction, and stripping depth.

Why Cut and Fill Matters

Balanced earthwork saves money. It can reduce hauling, dump fees, and imported material. A site with too much cut may need spoil removal. A site with too much fill may need borrow soil. Early volume checks help planners choose better grades before equipment reaches the project.

Grid Method Overview

This calculator uses a weighted grid method. Each grid point receives a depth difference. Corners have lower influence. Edge points have medium influence. Interior points have higher influence. The method gives a practical estimate when elevations are taken at regular spacing. It works well for pads, yards, roads, parking areas, and simple building sites.

Planning Notes

Field measurements should use the same datum. Units must stay consistent. Enter existing and proposed elevations in matching order. A small ordering mistake can change the result. Use tighter grid spacing for rough terrain. Use wider spacing only when the surface is smooth.

Material Behavior

Soil changes volume during handling. Bank volume means material in place. Loose volume is larger after excavation. Compacted volume is usually smaller after placement and rolling. Swell and shrinkage settings help convert between these states. The calculator also estimates truckloads using loose volume and selected truck capacity.

Best Use Cases

Use this calculator during concept grading, bid checks, small site estimates, and quantity reviews. It is useful before detailed survey modeling is complete. It can also compare two design options quickly. For final payment quantities, always follow project specifications and survey standards.

Accuracy Tips

Collect enough elevation points. Check units before submitting. Review outlier grades. Keep proposed elevations realistic. Add stripping depth only when topsoil removal is part of the earthwork scope. Add waste for unsuitable material, spillage, or trimming. Save results as CSV or PDF for faster review.

Final Thought

Earthwork estimates are planning tools. They support decisions, but they do not replace field judgment. Good survey data, clear assumptions, and careful checking give the best reliable results.

FAQs

What is cut volume?

Cut volume is soil removed from areas where existing ground is above the proposed design level. It is usually measured as bank volume before excavation.

What is fill volume?

Fill volume is soil needed where existing ground is below the proposed design level. It represents the material required to raise the grade.

Why do swell and shrinkage matter?

Excavated soil expands when loosened. Placed soil often shrinks after compaction. These factors change haul, import, and export quantities.

How should I enter elevation values?

Enter values in row order. Existing and proposed lists must match. A 3 by 3 grid needs exactly 9 numbers in each list.

Can this calculator handle meters?

Yes. Select meters in the unit field. The calculator then reports volumes in cubic meters and uses meter-based spacing.

What does net bank balance mean?

Net bank balance compares available cut material with bank material needed for fill. Positive means surplus. Negative means import is needed.

Should topsoil be included?

Include topsoil when stripping is part of the scope. It is treated as separate export volume, not structural fill material.

Is this suitable for final payment quantities?

Use it for planning and estimates. Final quantities should follow project survey data, contract rules, and professional grading standards.