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Road Base Calculator

Rectangular space. Replace bulk density and allowance using supplier data. Default density is an example, not a material specification.

Rectangular space. Replace bulk density and allowance using supplier data. Default density is an example, not a material specification.

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Result

Enter your values and run the tool to see your result.

What this tool does

Computes the volume and weight of road base material: volume times bulk density, plus a waste allowance.

How to use it

  1. Enter length and width in metres.
  2. Enter the base layer depth in metres.
  3. Enter bulk density from your supplier’s data.
  4. Enter the waste allowance and run it.

Worked example

10 m × 5 m × 0.1 m gives 5 m³; at 1,600 kg/m³ with 10% waste that is 8,800 kg.

Calculation method

Base volumelength*width*depth
Order masslength*width*depth*density*(1+waste/100)

Frequently asked questions

Is the depth before or after compaction?
The calculation uses the depth you enter as a space volume. To hit a compacted target you must lay it thicker loose, so raise the waste allowance.
What about multiple layers?
Depths and materials differ per layer, so compute each separately and add them.

What this tool does not cover

It assumes a rectangular area and ignores compaction factors, drainage slopes, and subgrade condition. The default density is illustrative.

References