Plasterboard Calculator
Free toolEnter the wall area to cover (or its length and height), the sheet size and the waste %, to find out how many sheets and screws to buy.
Result
Enter the wall area to calculate the sheets and screws needed.
How to use it
- Enter the dimensions of the wall or ceiling to cover.
- Check the sheet size and the waste percentage.
- Read the number of sheets and the approximate number of screws.
What it works out and how
The area is increased by the waste allowance (10% by default) and divided by the area of one sheet, which defaults to the standard 1.2 × 2.4 m, that is 2.88 m². The result is rounded up. Screws are estimated at 22 per sheet. If you are boarding both sides of a partition, double the area.
Frequently asked questions
What sheet thickness do I need?
12.5 mm is the usual choice for walls and ceilings. 15 mm or a double layer is used to improve sound insulation or strength.
When do I need moisture-resistant board?
In bathrooms, kitchens and other damp areas. It is recognizable by its green colour.
Does it include studs, tape and compound?
No. The calculation covers sheets and screws; metal framing, joint tape and compound have to be estimated separately.