Plasterboard Calculator
Enter your wall dimensions and plasterboard sheet size to estimate how many boards to buy.
10% is a useful planning allowance.
Enter your measurements and press Calculate.
How the plasterboard calculation works
The calculator divides the total wall area by the area of one plasterboard sheet, then adds your chosen waste allowance and rounds up to a whole sheet.
Typical plasterboard sizes
Common UK sheet sizes include 2400 × 1200 mm, 2700 × 1200 mm and 3000 × 1200 mm. Check the exact size and thickness required for your project before buying.
This is a quantity estimate, not structural or fire-safety advice. Specialist boards, fire ratings, moisture resistance and fixing requirements vary by application.
Frequently asked questions
Should I include waste?
Yes. A small waste allowance helps cover cuts, damaged edges and awkward layouts. Complex rooms may need more.
Does this include ceilings?
No. Calculate a ceiling separately using its length and width as the boardable area.