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Enter your dimensions and get an estimated quantity for your job. Add a wastage allowance, then request a trade quote when you are ready.
Enter the area you need to cover in square metres.
Browse the catalogue or send your list through for a trade quote.
Calculate how many sheets of plywood, OSB, chipboard or plasterboard you need for flooring, roofing, wall sheathing and linings. The calculator works in standard 2.4 m × 1.2 m sheets and adds a wastage allowance for cuts.
16 m² loft floor
Needs roughly 7 sheets of 18 mm OSB3 or P5 chipboard.
24 m² timber-frame wall
Needs about 9 sheets of 9 mm OSB3 sheathing.
30 m² plasterboard ceiling
Needs roughly 11 sheets of standard wallboard.
The calculator gives you a sensible starting quantity. For structural work, always confirm the specification and grade with your engineer or building control before ordering. We stock the standard trade lines and can source specialist grades or sizes with short lead times.
Working from drawings? Send us your dimensions, schedule or take-off and we will check the estimate, advise on the right product grade and wastage allowance, and book a delivery slot that matches your programme. We reply the same business day with a written trade quote.
Request a trade quote on the materials you have just calculated.