# Excavation & Backfill Calculator

Build a pit schedule and estimate excavation, spoil and backfill.

[Open this tool](https://whatson.pk/excavation-calculator/)

Category: Construction

Excavated ground, loose spoil and backfill are different quantities. A pit schedule helps keep those stages separate.

Enter rectangular excavation dimensions and the volume assumptions for the work. Add site details such as sloped sides or shoring through a separate measured plan.

## Inputs and controls

* Measurement unit: Feet; Metres; Inches; Centimetres; Millimetres
* Permanent occupied volume (m³). Allowed range: 0 to 1000000000
* Loose spoil factor. Allowed range: 1 to 3
* Delivered fill factor. Allowed range: 1 to 3
* Truck capacity (cft). Allowed range: 0.1 to 10000
* Excavation rate (PKR / m³). Allowed range: 0 to 1000000000. Optional. Enter your own supplier quote.
* Delivered fill rate (PKR / cft). Allowed range: 0 to 1000000000. Optional. Enter your own supplier quote.
* Reference
* Length. Allowed range: 0.001 to 100000
* Width. Allowed range: 0.001 to 100000
* Depth. Allowed range: 0.001 to 100000
* Quantity. Allowed range: 1 to 10000

## How to use

* Choose measurement unit. Enter permanent occupied volume.

* Enter loose spoil factor, delivered fill factor and truck capacity.

* Enter excavation rate and delivered fill rate.

* Add the entries in excavation schedule as separate rows. Include reference, length, width, depth and quantity for each row.

* Select Calculate estimate. Read the returned values alongside the assumptions below before copying, exporting or acting on the result.


## Why use this tool

Several pit rows make the earthwork estimate easier to trace when the project includes foundations, trenches and other rectangular cuts.


## Before relying on the result

Rectangular excavation volumes only. Sloped sides, shoring and site access are not assessed.


## Tool limitations

Rectangular excavation volumes only. Sloped sides, shoring and site access are not assessed.

## Questions

### Does this assess excavation safety?

No. Ground conditions, shoring, access and safe working methods require site assessment. The calculation is a volume planning aid.

### What should I check before using Excavation & Backfill Calculator?

Check Measurement unit, Permanent occupied volume, Loose spoil factor and Delivered fill factor. Use the exact units shown beside the controls and replace any example values with your own inputs.

Source page last modified (UTC): 2026-10-01T14:08:57+00:00

This profile describes the tool. It does not execute it or supply a professional certification.