---
title: "How many sheets of plasterboard? Table by room size (UK)"
description: "Plasterboard for 10 room sizes, 2 × 2 m to 5 × 6 m. A 3 × 4 m room needs 17 boards for walls and ceiling, 13 for the walls alone. Generic example figures."
url: https://buildbatch.co.uk/examples/how-many-sheets-of-plasterboard-by-room-size/
---

[Guides](https://buildbatch.co.uk/guides/) / [Example shopping lists](https://buildbatch.co.uk/examples/)

# How many sheets of plasterboard do I need? A table by room size

A 3 × 4 m room (9.8 × 13.1 ft), 2.4 m high, with one door, has 44.09 m² of wall and ceiling to board and needs 48.5 m² of plasterboard with 10% extra for cuts: 17 boards of 1.2 m × 2.4 m (48.96 m²), with 0.46 m² left over. The walls alone are 32.09 m² and need 13 boards of 1.2 m × 2.4 m; the ceiling alone is 12 m² and needs 5 boards of 1.2 m × 2.4 m. The board size and the allowance are generic example figures, not a product’s, and the boards are counted by area, not from a cutting layout: use the size of the board you choose.

Worked out by the planner · Updated 5 October 2026

**Sheets of plasterboard by room size**

| Room | In feet | Ceiling area | Boards for the ceiling | Wall area, less the door | Boards for the walls | Boards for walls and ceiling | Your room |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 2 × 2 m | 6.6 × 6.6 ft | 4 m² | 2 | 17.69 m² | 7 | 9 | [Open 2 × 2 m in the planner](https://buildbatch.co.uk/start/#v=1&job=plasterboard&walls=board&ceiling=board&trim=none&units=m&length=2&width=2&height=2.4&door=0.762x1.981&surface=sound&subfloor=unsure&ground=unsure&fitting=unsure&board=quick&board.finish=unsure&board.fixing=unsure&end=17) |
| 2.5 × 3 m | 8.2 × 9.8 ft | 7.5 m² | 3 | 24.89 m² | 10 | 13 | [Open 2.5 × 3 m in the planner](https://buildbatch.co.uk/start/#v=1&job=plasterboard&walls=board&ceiling=board&trim=none&units=m&length=3&width=2.5&height=2.4&door=0.762x1.981&surface=sound&subfloor=unsure&ground=unsure&fitting=unsure&board=quick&board.finish=unsure&board.fixing=unsure&end=17) |
| 3 × 3 m | 9.8 × 9.8 ft | 9 m² | 4 | 27.29 m² | 11 | 14 | [Open 3 × 3 m in the planner](https://buildbatch.co.uk/start/#v=1&job=plasterboard&walls=board&ceiling=board&trim=none&units=m&length=3&width=3&height=2.4&door=0.762x1.981&surface=sound&subfloor=unsure&ground=unsure&fitting=unsure&board=quick&board.finish=unsure&board.fixing=unsure&end=17) |
| 3 × 3.5 m | 9.8 × 11.5 ft | 10.5 m² | 5 | 29.69 m² | 12 | 16 | [Open 3 × 3.5 m in the planner](https://buildbatch.co.uk/start/#v=1&job=plasterboard&walls=board&ceiling=board&trim=none&units=m&length=3.5&width=3&height=2.4&door=0.762x1.981&surface=sound&subfloor=unsure&ground=unsure&fitting=unsure&board=quick&board.finish=unsure&board.fixing=unsure&end=17) |
| 3 × 4 m | 9.8 × 13.1 ft | 12 m² | 5 | 32.09 m² | 13 | 17 | [Open 3 × 4 m in the planner](https://buildbatch.co.uk/start/#v=1&job=plasterboard&walls=board&ceiling=board&trim=none&units=m&length=4&width=3&height=2.4&door=0.762x1.981&surface=sound&subfloor=unsure&ground=unsure&fitting=unsure&board=quick&board.finish=unsure&board.fixing=unsure&end=17) |
| 3.5 × 4 m | 11.5 × 13.1 ft | 14 m² | 6 | 34.49 m² | 14 | 19 | [Open 3.5 × 4 m in the planner](https://buildbatch.co.uk/start/#v=1&job=plasterboard&walls=board&ceiling=board&trim=none&units=m&length=4&width=3.5&height=2.4&door=0.762x1.981&surface=sound&subfloor=unsure&ground=unsure&fitting=unsure&board=quick&board.finish=unsure&board.fixing=unsure&end=17) |
| 4 × 4 m | 13.1 × 13.1 ft | 16 m² | 7 | 36.89 m² | 15 | 21 | [Open 4 × 4 m in the planner](https://buildbatch.co.uk/start/#v=1&job=plasterboard&walls=board&ceiling=board&trim=none&units=m&length=4&width=4&height=2.4&door=0.762x1.981&surface=sound&subfloor=unsure&ground=unsure&fitting=unsure&board=quick&board.finish=unsure&board.fixing=unsure&end=17) |
| 4 × 5 m | 13.1 × 16.4 ft | 20 m² | 8 | 41.69 m² | 16 | 24 | [Open 4 × 5 m in the planner](https://buildbatch.co.uk/start/#v=1&job=plasterboard&walls=board&ceiling=board&trim=none&units=m&length=5&width=4&height=2.4&door=0.762x1.981&surface=sound&subfloor=unsure&ground=unsure&fitting=unsure&board=quick&board.finish=unsure&board.fixing=unsure&end=17) |
| 5 × 5 m | 16.4 × 16.4 ft | 25 m² | 10 | 46.49 m² | 18 | 28 | [Open 5 × 5 m in the planner](https://buildbatch.co.uk/start/#v=1&job=plasterboard&walls=board&ceiling=board&trim=none&units=m&length=5&width=5&height=2.4&door=0.762x1.981&surface=sound&subfloor=unsure&ground=unsure&fitting=unsure&board=quick&board.finish=unsure&board.fixing=unsure&end=17) |
| 5 × 6 m | 16.4 × 19.7 ft | 30 m² | 12 | 51.29 m² | 20 | 32 | [Open 5 × 6 m in the planner](https://buildbatch.co.uk/start/#v=1&job=plasterboard&walls=board&ceiling=board&trim=none&units=m&length=6&width=5&height=2.4&door=0.762x1.981&surface=sound&subfloor=unsure&ground=unsure&fitting=unsure&board=quick&board.finish=unsure&board.fixing=unsure&end=17) |

Each row is the planner’s answer for that room, worked out when this page was built. The link at the end of a row opens the planner with that room filled in, to change the measurements and the product figures.

The boards are counted by area: the area to board, plus 10% for cuts, divided by the area of one board and rounded up. It is not a cutting layout, so check awkward shapes before buying. [How many sheets of plasterboard do I need?](https://buildbatch.co.uk/guides/how-many-sheets-of-plasterboard-do-i-need/) works through a 4 m × 3 m room that also has a window.

The last column is not always the other two added together. Bought for the walls and the ceiling at once, the boards are rounded up once, which comes to a board fewer in the 3 × 3 m room, the 3 × 3.5 m room, the 3 × 4 m room, the 3.5 × 4 m room and the 4 × 4 m room.

The boards are 1.2 m × 2.4 m, the planner’s generic example, in one layer. Another board size or a second layer changes the count: the [plasterboard calculator](https://buildbatch.co.uk/plasterboard-calculator/) takes the size and the layers of yours.

## What the table assumes

Each room is a rectangle 2.4 m high, with one door 0.762 m × 1.981 m.

- 1 door taken off the wall area; nothing is taken off the ceiling or the floor.
- Plasterboard is counted by area across the chosen surfaces, in 1.2 m × 2.4 m boards, 1 layer, with 10% extra. This is not a cutting layout; check awkward shapes before buying.
- Every quantity is rounded once, at the end, up to whole packs. Working uses unrounded figures.
- Plasterboard use generic example figures, not the figures of any product. Enter the figures from the tin or pack for a closer answer.
- Board size, layers and allowance (generic examples). Doors and windows entered for the room are taken off the wall area.

## How this table was made

It was worked out when this page was built, by the same room planner and formulas as the editable list: each row is one room sent through the planner. The room sizes are round examples. Product coverage, pack and allowance figures are the planner’s labelled generic examples, not figures for a product.

AI tools drafted the page and automated tests compare every cell with the planner. It has not been checked by a tradesperson or anyone outside the build. No price is shown or used.

## Before you use it

Measure your own room, its doors and its windows. Check the figures against the room, and follow each product's own instructions: they decide coverage, coats and preparation.

Built and checked with AI tools, not yet by a tradesperson or anyone outside the build. Estimates are arithmetic on your measurements and the figures shown with them: follow each product's own instructions.

**Make it your room.** The planner works from your own measurements and the figures on your tin, roll or pack, and gives the whole shopping list with its working.

[Plasterboard calculator: your room and your board size](https://buildbatch.co.uk/plasterboard-calculator/)

- [Guide: how many sheets of plasterboard do I need?](https://buildbatch.co.uk/guides/how-many-sheets-of-plasterboard-do-i-need/)
- [Guide: wastage allowance explained](https://buildbatch.co.uk/guides/wastage-allowance-explained/)

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