A Concrete Block Calculator For Your Project - 2023 Prices | Checkatrade
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Last updated on March 31st, 2022

Concrete block calculator

Concrete blocks are the most common building material used in the construction of homes in the UK. Check out our concrete block calculator formula to help you work out how many concrete blocks you’ll need, and how much they roughly cost.

Concrete blocks are the most common building material used in the construction of homes in the UK. In this guide, we’ve put together a concrete block calculator formula to help you work out how many concrete blocks you’ll need, and how much they cost.

The popularity of concrete blocks is thanks to their numerous benefits as a versatile and durable building component to work with. The calculator formula and prices in this article are only a guide. For accurate quotes for costs and the number of concrete blocks you’ll need for a project, we always recommend speaking to local concrete specialists.

Concrete block calculator

The number of concrete blocks you need will vary depending on the project, whether you need them for walls, retaining walls, a new garage, foundations or other building work.

For the purpose of this guide, we are basing our calculator formula on the standard concrete block size in the UK, which is W440mm x H215mm.

How much do concrete blocks cost?

ItemRange - LowRange - HighAverage cost
100mm dense concrete block£1£4£2.50
215mm hollow dense concrete block£3£5£4

Our costs are ballpark averages – get a local tradesperson to quote now

On average, 100mm thick dense concrete blocks cost in the region of £1 – £4 per block. For a 215mm thick hollow dense concrete block, the average cost is around £3 – £5 per block.

The exact price you pay for concrete blocks will depend on a number of factors, including:

  • Type of concrete block
  • Size
  • Quantity
  • Any special treatment
  • Transport costs

Concrete blocks being preparedSome concrete block suppliers may offer a discount if you’re ordering a large number of concrete blocks, so it’s worth getting a quote based on actual numbers.

Concrete block calculator formula

To calculate the number of concrete blocks you need, a rough guide is approximately 10 concrete blocks per m2 (including a 10mm mortar joint).

As with any building materials, it’s sensible to calculate how many concrete blocks you think you’ll need and then add a contingency of 10-20% on top of that – to avoid running out.

We also recommend speaking to your local concrete block suppliers about your construction project, to get their professional recommendation on the number of concrete blocks you’ll need.

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Concrete block wall cost calculator

For a concrete block wall, the number of blocks you’ll need and the price you’ll pay will depend on the size of the wall and whether it’s single or double skin.

For a single skin wall, you’ll need approximately 10 concrete blocks per m2. And for a double skin wall, you’ll need roughly 20 concrete blocks per m2.

Benefits of concrete blocks

Here are some of the reasons why concrete blocks have become a solid favourite for construction in the UK:

  • Strong and durable, and concrete actually gets stronger over time.
  • Fire-resistant, unlike flammable wooden structures
  • Excellent insulation to keep your home energy bills down
  • Available in a variety of shapes, sizes and finishes
  • Affordable to help your budget go further
  • Sustainable, so you can be confident knowing you’re choosing an environmentally-friendly building material

Concrete block quotes

We always recommend obtaining at least three quotes from our trusted tradespeople. Our request a quote feature is perfect for getting quotes – you post details about the job you want doing and we’ll send it out to local tradespeople in your area. Try it out!

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