Need to work out how much to order?

We use a number of simple equations and calculations to help us convert and work out required quantities. We have included some of these on this page which we hope will make the mathematics a little easier for you too.

Step 1

You need to measure the length and width of the area you wish to fill.  To keep things simple try to work in metres.

Step 2 

Once you  have done this you need to work out the total area. This is done by using the following formula: 

A (width) x B (length) = C (Total Area)

Step 3

Now you need to multiply C by the required depth of material.

C x required depth of material = D (Total required amount of material in cubic metres)

Useful Conversions for Calculating Depths

Step 4

If you are working with products that are sold by the cubic metre such as woodchip, compost or bark the figure you reached in Step 3 (D) is the amount you actually need.

You should allow an extra 10% for compaction as most natural materials settle and condense.

For other products you will need to convert cubic metres into tonnes:-

Remember there are:-

1000 litres in a m³

1000 kg in a tonne (equivalent to 40 x 25kg bags)

THE ABOVE INFORMATION IS INTENDED AS A GUIDE ONLY, WE CANNOT BE HELD RESPONSIBLE FOR CALCULATIONS & APPLICATIONS BEYOND OUR CONTROL.