Coverage of materials graph

If you are laying a patio or drive, placing topsoil for a lawn or covering your garden with stone, it is very useful to know how much you will need. Use our easy to read graph below to get the quantities right.

Measure the area of your garden and go up the left hand side of the graph to that area (for example 20 square metres at the top). Read horizontally along that line to the thickness of material you need (example 100mm). Where that line meets the diagonal line of your chosen depth go straight down and read the amount you need in cubic metres. (example = 2.00 cubic metres) This can be converted into weight using the table below.

Dry sand fine	1.28 tonnes per cubic metre
Dry sand coarse	1.6 tonnes per cubic metre
Topsoil(some moisture)	1.44 tonnes per cubic metre
Ballast	1.76 tonnes per cubic metre
gravel	1.92 tonnes per cubic metre
shingle	1.62 tonnes per cubic metre
stiff clay	1.6 tonnes per cubic metre
loam	1.28 tonnes per cubic metre
peat (wet)	0.96 tonnes per cubic metre
peat (dry)	0.96 tonnes per cubic metre
lump chalk	1.2 tonnes per cubic metre
sandstone	2.32 tonnes per cubic metre
Lias	2.48 tonnes per cubic metre
granite	2.72 tonnes per cubic metre
slate	2.8 tonnes per cubic metre
flint	2.3 tonnes per cubic metre
yorkstone	2.5 tonnes per cubic metre
Brick rubble	1.8--2.2 tonnes per cubic metre