Plan your materials

UK plasterboard calculator

Enter the dimensions of one wall or ceiling to estimate how many plasterboard sheets you need.

Surface dimensions

What are you boarding?

Wall length

Wall height

Use metres. Measure the full surface before deducting doors, windows or other openings.

Board and waste

Plasterboard sheet size

Waste allowance 10%

10% is a practical starting allowance for cuts, damage and offcuts.

Your estimate

Total area —

Theoretical minimum —

Suggested number to buy — Includes 10% waste allowance

Enter both dimensions to see your estimate.

How the calculation works

The calculator multiplies the two surface dimensions to find the total area. It then divides that area by the selected sheet area and rounds up to a whole board.

The suggested quantity applies your chosen waste allowance to the surface area before rounding up. It is an estimate: board orientation, joins, staggered layouts, openings and the cuts you can reuse may change the number actually required.