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Calculator · Drain pipes

How much stone does a trench or bed need?

Enter length, width and depth for a rectangular trench or bed to get its volume in cubic feet and cubic yards.

Geometric volume only. It doesn't allow for compaction, weight or the space a pipe takes up.

DRAINAGE CALCULATOR

Aggregate volume

What volume does a rectangular layer or trench occupy?

SEE THE VOLUME

The rectangular space you are measuring
The rectangular space you are measuring. 20 ft long, 2 ft wide, 6 inches deep.20 ft2 ft6 in
  • 20 ft long
  • 2 ft wide
  • 6 inches deep

Illustration not drawn to scale. The solid block represents occupied space, not a quantity of individual stones.

Showing the starting values. Change the inputs and calculate to update the picture.

ESTIMATED VOLUME

Enter values to calculate.

Calculated locally in your browser. Your measurements are not sent.

The calculation.

Cubic feet = length × width × (depth inches ÷ 12). Cubic yards = cubic feet ÷ 27.

A worked example.

20 ft × 2 ft × (6 inches ÷ 12) = 20 cubic feet, or about 0.741 cubic yards.

What the number means.

This is the geometric volume of a rectangular space. It does not deduct pipe displacement or add compaction, settlement, irregular excavation or delivery allowances. Material weight requires a separately verified density.

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