Boneyard Tools

Cut and Fill Volume Calculator

Enter the cut or fill cross-section area at two survey stations and the distance between them, all in feet. The calculator applies the average end area method, averaging the two areas and multiplying by the length, to estimate the earthwork volume. It reports the result in both cubic feet and cubic yards, and you can copy both figures at once.

How to estimate cut and fill volume

  1. Measure the cross-section area at the first station and type it into 'Cross-section area 1' in square feet.
  2. Do the same for the second station in 'Cross-section area 2'.
  3. Enter the run between the two stations in 'Length between stations' in feet.
  4. Read the estimated volume in cubic feet on the left and in cubic yards on the right.
  5. Click Copy to grab both volumes as text for your takeoff sheet.

Examples

Volume between two stations

area 1 = 50 sq ft, area 2 = 70 sq ft, length = 100 ft
6000 cubic feet, about 222.22 cubic yards

Uniform cross-section

area 1 = 30 sq ft, area 2 = 30 sq ft, length = 50 ft
1500 cubic feet, about 55.56 cubic yards

A larger road segment

area 1 = 120 sq ft, area 2 = 160 sq ft, length = 200 ft
28000 cubic feet, about 1037.04 cubic yards

Frequently asked questions

What is the average end area method?

It estimates the volume between two cross-sections by averaging their areas and multiplying by the distance between them: volume equals length times the sum of the two areas divided by 2. It is the standard shortcut for earthwork takeoffs from surveyed sections.

How accurate is the average end area method?

It is exact when the cross-section changes linearly from one station to the next, and it slightly overestimates when the ground curves in between. On highway and site work it is accepted as close enough for pay quantities.

When would I use the prismoidal formula instead?

When you need higher precision and have a measured area at the midpoint, the prismoidal formula weights the middle section and reduces the overestimate. This tool uses only the two end areas, which is the more common field method.

How do I convert cubic feet to cubic yards?

Divide cubic feet by 27, because one cubic yard is a 3 by 3 by 3 foot cube. The calculator shows both numbers, so 6000 cubic feet reads as about 222.22 cubic yards.

Does this calculate cut or fill?

Both, because the arithmetic is identical. Use cut cross-section areas to estimate excavation and fill cross-section areas to estimate embankment, and read the volume for that material.

How do I total a long alignment from many stations?

Run the calculator on each neighboring pair of stations, then add the volumes. Chaining consecutive average end area segments this way is exactly how a full earthwork profile is summed.

Why must the areas and length be greater than zero?

A real volume needs real cross-sections and a real run, so zero or negative entries are rejected. Enter measured areas in square feet and the length in feet.

Does the result account for soil swell or shrinkage?

No. It returns the in-place, or bank, volume. To find loose truck volume or compacted fill you must apply a swell or shrinkage factor to this figure separately.

Is my data sent anywhere?

The browser tool computes everything locally, so your station areas and lengths stay on your device. Only the optional JSON API sends values over the network.

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