How much coated material do I need?

This Calculator will work out the volume of coated materials from Length and Width or from a given Area.

NB THESE VOLUMES ARE A GUIDE ONLY and actual volumes may vary due to inconsistent laying.

Use our to change part units and imperial units to metres.

The following table gives an overview of recommended layer thickness appropriate to the required nominal size. To perform a calculation, click below on the Calculator button for the appropriate material.
  

Material Description

BS 4987
Part 1 Ref

Nominal
Size
(mm)

Nominal
Layer
Thickness
(mm)

Click the
corrsponding
Calculator
Button

Fine Grade Surface Course 7.7 0/3 15-25
Medium Grade Surface Course 7.6 0/6 20-25
Dense Surface Course 7.5 0/6 20-30
Open Graded Surface Course 7.2 0/10 30-35
Close Graded Surface Course 7.4 0/10 30-35
Open Graded Surface Course 7.1 0/14 35-55
Close Graded Surface Course 7.3 0/14 40-55
Open Graded Binder Course 6.1 0/20 45-75
Dense Binder Course 6.5 0/20 50-80
Dense Binder Course 6.4 0/32 70-100
Dense Base (Roadbase) 5.2 0/32 70-100