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Bank Cubic Yards from Area Measurement

Bank Cubic Yards
Truck Cubic Yards
Estimated Tonage

Calculating the volume of material to be hauled off from a site is a fairly straight forward endeavor.
The Area (square feet) and Depth (inches) give you the volume to be removed.
First we need to convert the depth into feet:
Depth(feet) = Depth (inches) / 12
Then we need to convert Area and Depth into a volume (cubic feet):
volume (cubic feet) = Area (square feet) * Depth (feet)
After this we need to convert the volume into Bank Cubic yards (BCY):
BCY = Volume / 27
To get your Truck cubic yards, you then need to multiply your BCY by
a swell factor which for this calculator is 1.3 (if you have 100 bank cubic yards
to excavate you will haul have to haul off 130 track cubic yards).
Finally the tonnage is then calculated off of the average density of the material (ton/cubic yard):
Tonnage = Density * BCY.

Pipe Bedding and Backfill Calculator

Estimated Rock Bed
Bank Cubic Yards Below Pipe
Truck Cubic Yards Below Pipe
Estimated Tonage Below Pipe
Rock Backfill
Bank Cubic Yards Above Pipe
Truck Cubic Yards Above Pipe
Estimated Tonage Above Pipe

Calculating the volume of material to be used in pipe bedding and back fill is a similar process to that of calculating material to be hauled off.
We have to convert the bed depth and the backfill depth into feet, as before the conversion is dividing the number by 12:
Bed depth(feet) = bed depth(inches)/12
Backfill depth(feet) = backfill(inches)/12
This time though we do not have an area to work with so we take the length of the pipe run multiplied by width of the trench by the depth to get the volume:
Volume (cubic feet) = length of run (feet) * Width of trench (feet) * bed depth (feet)
Volume (cubic feet) = length of run (feet) * Width of trench (feet) * backfill depth (feet)
Then to get the Bank Cubic Yards, Truck Cubic Yards, and Tonnage we do the same calculations as above.
BCY = Volume/27
TCY = BCY * 1.3
Tonnage = Density * BCY

An important note about this calculator is that it is best suited for smaller diameter pipes.
For smaller pipes, we can ignore the displacement rock by the pipe since it is negligible.
If we are to calculate larger pipes, we then have to subtract the displaced volume by subtracting half of the volume of the pipe from the calculated volumes.