Cut and Fill Material Balance Calculator

Compare measured excavation with compacted fill to estimate surplus or additional material needed.

Inputs

Preset: Yard cut and fill

Compare 90 bank ft³ excavated with 60 compacted ft³ required. The 0.8 compacted-to-bank ratio is an assumed scenario factor; replace it with a measured material factor.

Surplus or shortfall - Measured excavated volume (ft³), Compacted fill volume needed (ft³), Compacted-to-bank volume ratio (ratio)
Enter measured excavated volume in ft³.
Enter compacted fill volume needed in ft³.
Enter compacted-to-bank volume ratio in ratio.
Formula, inputs and conditions

Formula: Measured excavated volume-Compacted fill volume needed/Compacted-to-bank volume ratio

Decimal results are displayed to two places when needed.

Inputs
Measured in-place cut volume, required compacted fill volume, and compacted-to-bank volume ratio.
Outputs
Net surplus or shortfall in in-place cubic feet.
Conditions and scope
Balances user-measured quantities only; it does not design grading or drainage. Loose haul volume needs a separate conversion factor. Confirm whether excavated material is suitable for the intended fill before treating a surplus as reusable. Results are planning estimates, not engineering, permit, code or contractor-price decisions.

Compare cut and fill in the same state

Excavated material measured in place is called bank volume. Compacted fill occupies a different volume. Before subtracting one from the other, this calculator converts the required compacted fill back into bank volume using your stated ratio.

Measure and calculate

  1. Measure excavation as bank cubic feet and fill demand as compacted cubic feet.
  2. Enter compacted volume divided by bank volume for the specific material and process.
  3. Read a positive result as bank-volume surplus and a negative result as bank-volume shortfall.
Calculation method

Bank-volume balance = excavated bank volume − compacted fill demand ÷ compacted-to-bank ratio.

A worked example

Inputs
You excavate 90 bank ft³ and need 60 compacted ft³. The assumed compacted-to-bank ratio is 0.8.
Calculation
Required bank volume: 60 ÷ 0.8 = 75 ft³. Balance: 90 − 75 = 15 bank ft³.
Result
15 bank ft³

The model reports a 15 bank ft³ surplus. It does not convert that surplus into loose truck volume or judge whether the excavated material is suitable for reuse.

Read the result

Output interpretation and next steps
Output or checkWhat it means for your project
Positive balance: bank ft³More in-place excavation is available than the bank-volume equivalent of the fill demand. Suitability for reuse remains a separate check.
Negative balance: bank ft³The magnitude is the modeled shortage in bank volume. Convert to the supplier’s delivered material state before ordering.
Compacted-to-bank ratioThe ratio converts between stated volumes. A bank-volume balance is not a loose-volume truckload count.

Common questions

Does a negative answer indicate a calculation error?

Not necessarily. It means the converted fill requirement exceeds the measured excavation under your chosen ratio.

Is 0.8 a standard compaction factor?

No. It is an explicit example assumption. The usable ratio depends on the material and operation and should come from project-specific evidence.