How do I calculate how much composite decking I need?

The first thing is to measure the length and width of the area. Multiply these two measurements to give you the square metreage needed. Don’t forget to take into account any steps needed.
Once this figure is known, you can either use an online decking calculator tool (https://ddecks.co.uk/decking-calculator/ ) or you can work out what you need using the below steps.

1. Once you have selected a board you like, multiply the length of the board by the width of the board and divide by 1 million. This will give you the m2 coverage of each board. For example, our Duro360 board is 3.6m long x 138mm wide – 3600mm x 138mm = 496,800 divided by 1 million = 0.4968m2 per board coverage).
2. Add either 5% for a standard deck or 10% for a more complex deck to allow for diagonal or curved shapes and multiple cuts to the total m2 required for the install – this will allow for any wastage.
3. Divide the total m2 required by the single board m2 coverage. This will give you the number of boards required (always round up to the nearest full figure). This is the minimum number of boards required – it’s always best to add a couple to this to make sure there is enough to complete the job.