---
title: "Patio slabs, sand and cement: table by size (UK) | BuildBatch"
description: "Slabs, sand and cement for 10 patio sizes, 2 × 3 m to 6 × 6 m. A 3 × 4 m patio takes 36 slabs of 600 × 600 mm. Example and typical figures."
url: https://buildbatch.co.uk/examples/how-many-paving-slabs-by-patio-size/
---

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

# How many paving slabs and how much sand and cement do I need for a patio? A table by patio size

A 3 × 4 m patio (9.8 × 13.1 ft) is 12 m², and takes 36 slabs of 600 × 600 mm with a 10 mm joint and 10% for cuts. Its 30 mm mortar bed, at 1 part cement to 4 parts sharp sand, is 1 bulk bag of sharp sand and 6 bags of 25 kg cement; 100 mm of Type 1 under it is 3 bulk bags; and the slabs take 1 tub of primer and 2 pails of jointing. The slab, its joint and the allowance for cuts are generic example figures, not a product’s and not a design: use your slab’s size. The bed, the mix and the sub-base’s depth are two makers’ laying guides’ figures, and what each bag, tub and pail holds is a typical figure, each named on its line in the planner.

Worked out by the planner · Updated 11 October 2026

**Slabs, bed and sub-base for a patio by patio size**

| Patio | In feet | Patio area | Slabs, 600 × 600 mm | Sharp sand | Cement, 25 kg bags | Type 1, 100 mm deep | Your patio |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 2 × 3 m | 6.6 × 9.8 ft | 6 m² | 18 | 1 bulk bag | 3 bags | 2 bulk bags | [Open 2 × 3 m in the planner](https://buildbatch.co.uk/start/#v=1&job=patio&walls=none&ceiling=none&trim=none&units=m&length=3&width=2&surface=sound&subfloor=unsure&ground=unsure&fitting=unsure&patio=quick&patio.examples=none&end=14) |
| 3 × 3 m | 9.8 × 9.8 ft | 9 m² | 27 | 1 bulk bag | 5 bags | 2 bulk bags | [Open 3 × 3 m in the planner](https://buildbatch.co.uk/start/#v=1&job=patio&walls=none&ceiling=none&trim=none&units=m&length=3&width=3&surface=sound&subfloor=unsure&ground=unsure&fitting=unsure&patio=quick&patio.examples=none&end=14) |
| 3 × 4 m | 9.8 × 13.1 ft | 12 m² | 36 | 1 bulk bag | 6 bags | 3 bulk bags | [Open 3 × 4 m in the planner](https://buildbatch.co.uk/start/#v=1&job=patio&walls=none&ceiling=none&trim=none&units=m&length=4&width=3&surface=sound&subfloor=unsure&ground=unsure&fitting=unsure&patio=quick&patio.examples=none&end=14) |
| 3 × 5 m | 9.8 × 16.4 ft | 15 m² | 45 | 1 bulk bag | 7 bags | 4 bulk bags | [Open 3 × 5 m in the planner](https://buildbatch.co.uk/start/#v=1&job=patio&walls=none&ceiling=none&trim=none&units=m&length=5&width=3&surface=sound&subfloor=unsure&ground=unsure&fitting=unsure&patio=quick&patio.examples=none&end=14) |
| 4 × 4 m | 13.1 × 13.1 ft | 16 m² | 48 | 1 bulk bag | 8 bags | 4 bulk bags | [Open 4 × 4 m in the planner](https://buildbatch.co.uk/start/#v=1&job=patio&walls=none&ceiling=none&trim=none&units=m&length=4&width=4&surface=sound&subfloor=unsure&ground=unsure&fitting=unsure&patio=quick&patio.examples=none&end=14) |
| 4 × 5 m | 13.1 × 16.4 ft | 20 m² | 60 | 2 bulk bags | 10 bags | 5 bulk bags | [Open 4 × 5 m in the planner](https://buildbatch.co.uk/start/#v=1&job=patio&walls=none&ceiling=none&trim=none&units=m&length=5&width=4&surface=sound&subfloor=unsure&ground=unsure&fitting=unsure&patio=quick&patio.examples=none&end=14) |
| 4 × 6 m | 13.1 × 19.7 ft | 24 m² | 71 | 2 bulk bags | 12 bags | 6 bulk bags | [Open 4 × 6 m in the planner](https://buildbatch.co.uk/start/#v=1&job=patio&walls=none&ceiling=none&trim=none&units=m&length=6&width=4&surface=sound&subfloor=unsure&ground=unsure&fitting=unsure&patio=quick&patio.examples=none&end=14) |
| 5 × 5 m | 16.4 × 16.4 ft | 25 m² | 74 | 2 bulk bags | 12 bags | 6 bulk bags | [Open 5 × 5 m in the planner](https://buildbatch.co.uk/start/#v=1&job=patio&walls=none&ceiling=none&trim=none&units=m&length=5&width=5&surface=sound&subfloor=unsure&ground=unsure&fitting=unsure&patio=quick&patio.examples=none&end=14) |
| 5 × 6 m | 16.4 × 19.7 ft | 30 m² | 89 | 2 bulk bags | 14 bags | 7 bulk bags | [Open 5 × 6 m in the planner](https://buildbatch.co.uk/start/#v=1&job=patio&walls=none&ceiling=none&trim=none&units=m&length=6&width=5&surface=sound&subfloor=unsure&ground=unsure&fitting=unsure&patio=quick&patio.examples=none&end=14) |
| 6 × 6 m | 19.7 × 19.7 ft | 36 m² | 107 | 3 bulk bags | 17 bags | 8 bulk bags | [Open 6 × 6 m in the planner](https://buildbatch.co.uk/start/#v=1&job=patio&walls=none&ceiling=none&trim=none&units=m&length=6&width=6&surface=sound&subfloor=unsure&ground=unsure&fitting=unsure&patio=quick&patio.examples=none&end=14) |

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

This is a material quantity, not a design: the fall, the levels against a damp-proof course, the sub-base and the drainage are the guides' and a designer's.

The slab is the planner's example, 600 × 600 mm with a 10 mm joint: each covers 0.3721 m² with its joint, so a square metre takes 2.69 slabs before the 10% for cuts. Another slab changes the count: enter its size on the [patio calculator](https://buildbatch.co.uk/patio-calculator/).

The bed is 30 mm of 1 part cement to 4 parts sharp sand, as two makers' laying guides give it. The dry sand and cement take more room than the bed they make, and the planner counts that; what each bag, tub and pail holds is a typical figure named on its line. Every patio here also takes a tub or more of primer and pails of jointing: the list each row opens counts them.

The Type 1 is 100 mm deep, the makers' usual minimum, a typical figure: the depth is the design's. [How much sand and cement for a patio?](https://buildbatch.co.uk/guides/how-much-sand-and-cement-for-a-patio/) works through the 3 × 4 m patio.

## What the table assumes

Each patio is a rectangle.

- Doors and windows are not used for a patio.
- The slabs are rounded once, at the end, up to whole slabs; the sand, cement, sub-base, primer and jointing each once, up to whole bags, tubs or pails. Working uses unrounded figures.
- The figures for paving slabs are generic examples, not the figures of any product. Enter the slab's size and the figures from its pack for a closer answer.

## 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 patio sent through the planner. The sizes are round examples. The slab, its joint and the allowance for cuts are the planner’s labelled generic examples, not figures for a product; the bed, the sub-base and what each pack holds are typical figures whose sources it names.

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 the patio you will lay, and take off nothing for a step or a drain until its size is known. Check the figures against the patio, and follow each product's own instructions: they decide the bed, the joints and how the slabs are laid.

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

[Patio calculator: your patio and your slab](https://buildbatch.co.uk/patio-calculator/)

- [Guide: how much sand and cement for a patio](https://buildbatch.co.uk/guides/how-much-sand-and-cement-for-a-patio/)

Other tables: [How much paint do I need? A table by room size](https://buildbatch.co.uk/examples/how-much-paint-by-room-size/) · [How many rolls of wallpaper do I need? A table by room size](https://buildbatch.co.uk/examples/how-many-rolls-of-wallpaper-by-room-size/) · [How many packs of laminate flooring do I need? A table by room size](https://buildbatch.co.uk/examples/how-many-packs-of-laminate-by-room-size/) · [How many lengths of skirting board do I need? A table by room size](https://buildbatch.co.uk/examples/how-many-lengths-of-skirting-board-by-room-size/) · [How many rolls of loft insulation do I need? A table by loft size](https://buildbatch.co.uk/examples/how-many-rolls-of-loft-insulation-by-loft-size/) · [How many tiles do I need for a bathroom? A table by room size](https://buildbatch.co.uk/examples/how-many-wall-tiles-for-a-bathroom-by-room-size/) · [How many sheets of plasterboard do I need? A table by room size](https://buildbatch.co.uk/examples/how-many-sheets-of-plasterboard-by-room-size/) · [How many floor tiles do I need? A table by room size](https://buildbatch.co.uk/examples/how-many-floor-tiles-by-room-size/) · [How much carpet do I need? A table by room size](https://buildbatch.co.uk/examples/how-much-carpet-by-room-size/) · [How many bags of concrete do I need for a shed base? A table by shed size](https://buildbatch.co.uk/examples/how-many-bags-of-concrete-for-a-shed-base/) · [How much paint do I need for new plaster? A table by room size](https://buildbatch.co.uk/examples/how-much-paint-for-new-plaster-by-room-size/) · [All example shopping lists](https://buildbatch.co.uk/examples/) · [How the estimates are worked out](https://buildbatch.co.uk/how-estimates-work/)