Ordering concrete can feel complicated, especially when you are trying to work out exactly how much you need for a domestic project. Order too little and you risk delays halfway through the job. Order too much and you may end up paying for material you do not use.
Whether you are laying a new driveway, building a garden patio, installing a shed base or preparing foundations for an extension, calculating the required amount of concrete is one of the most important steps in planning the work.
At Sheridan Concrete, we supply fresh concrete across Manchester and Greater Manchester for both domestic and commercial projects, with flexible delivery options and support available when you are unsure how much material your job will require.
How Is Concrete Measured?
Concrete is normally measured in cubic metres, written as m³.
To calculate the approximate amount of concrete required for a simple rectangular area, you need three measurements:
- Length of the area in metres
- Width of the area in metres
- Required concrete depth in metres
The calculation is:
Length × Width × Depth = Cubic Metres of Concrete Required
For example, a shed base measuring 4 metres long, 3 metres wide and 100mm deep would be calculated as follows:
4m × 3m × 0.1m = 1.2m³
This means the project would require approximately 1.2 cubic metres of concrete.
Remember that measurements need to be converted into metres. For example, 100mm becomes 0.1m and 150mm becomes 0.15m.
How Much Concrete Do I Need for a Shed Base?
A concrete shed base provides a strong, level surface for sheds, garden buildings and small outdoor structures.
The amount of concrete required will depend on the size of the shed and the depth of the base. As an example:
- A 3m x 2m shed base at 100mm depth requires approximately 0.6m³ of concrete.
- A 4m x 3m shed base at 100mm depth requires approximately 1.2m³ of concrete.
- A 5m x 4m garden building base at 100mm depth requires approximately 2m³ of concrete.
For shed bases and lighter domestic projects, it is still important to prepare the ground correctly before the concrete is poured. A stable sub-base and suitable depth will help reduce movement, cracking and uneven surfaces over time.
How Much Concrete Do I Need for a Patio?
Concrete patios provide a durable base for outdoor seating areas, paving finishes and garden improvements.
The required volume depends on the size and planned depth of the patio. For example:
- A 4m x 3m patio at 100mm depth requires approximately 1.2m³.
- A 5m x 4m patio at 100mm depth requires approximately 2m³.
- A 6m x 4m patio at 100mm depth requires approximately 2.4m³.
Patios can vary significantly depending on the design, access to the garden and whether the concrete is being used as the finished surface or as a base for another material.
For homes with restricted rear access, barrow mix concrete can be particularly useful, as the concrete can be mixed fresh and transported directly to the required pour location.
How Much Concrete Do I Need for a Driveway?
Driveways usually require a larger amount of concrete than patios or shed bases, as they need to support the weight of vehicles and withstand regular use.
For example:
- A small 5m x 3m driveway at 150mm depth requires approximately 2.25m³.
- A 6m x 4m driveway at 150mm depth requires approximately 3.6m³.
- A 10m x 5m driveway at 150mm depth requires approximately 7.5m³.
The appropriate depth and concrete specification for a driveway can depend on the expected vehicle weight, ground conditions and overall design of the installation. Before ordering, it is always sensible to check that the planned depth and concrete mix are suitable for the project.
Sheridan Concrete can advise on suitable options for domestic driveway projects across Manchester and the surrounding areas.
How Much Concrete Do I Need for Foundations?
Concrete foundations and footings are essential for extensions, garden walls, garages and other structural projects.
Unlike a simple patio or shed base, foundation calculations may involve trenches, varying depths and specific strength requirements. As an example, a foundation trench measuring 10 metres long, 0.6 metres wide and 0.75 metres deep would require:
10m × 0.6m × 0.75m = 4.5m³
However, foundation specifications should always follow the appropriate building plans, structural guidance or Building Control requirements where applicable.
For this type of work, ordering the correct concrete grade and quantity is especially important, as foundations are responsible for supporting the structure above them.
Should I Allow Extra Concrete When Ordering?
Even with accurate measurements, there can be small variations in the ground, trench depth or prepared area. This means the real amount required may differ slightly from the initial calculation.
Ordering concrete mixed fresh on-site can help reduce the risk of waste, because you are not relying entirely on a fixed pre-ordered amount. With Sheridan Concrete’s barrow mix service, you only pay for the concrete you use, making it a practical choice for projects where precise requirements may vary once the pour begins.
This can be especially useful for:
- Garden renovations
- House extensions
- Driveways
- Foundations and footings
- Restricted-access properties
- Smaller domestic construction projects
Concrete Delivery Across Manchester and Greater Manchester
Sheridan Concrete supplies fresh concrete for domestic and commercial projects throughout Manchester and surrounding areas, including Salford, Stockport, Oldham, Bury, Tameside, Rochdale and Altrincham.
Whether you are completing a small garden project or arranging concrete for a larger build, our team can help you understand how much concrete you need and arrange delivery to suit your job.
Our service includes:
- Fresh concrete mixed for your project
- Same-day delivery availability where possible
- Concrete suitable for domestic and commercial applications
- Barrow mix options for harder-to-access areas
- Support selecting the right quantity and concrete grade
- A pay-for-what-you-use approach to help minimise waste
Use Our Concrete Calculator
Before arranging your delivery, use our online concrete calculator to estimate the volume required for your project.
Simply enter the length, width and depth of the area, and the calculator will provide an estimated amount in cubic metres.
Once you have your measurements, contact Sheridan Concrete for guidance, a competitive quote and reliable concrete delivery across Manchester.
Need Concrete Delivered in Manchester?
Planning a driveway, patio, shed base, extension or foundation project?
Sheridan Concrete supplies freshly mixed concrete throughout Manchester and Greater Manchester, with flexible delivery options and a helpful local team ready to support your project.
Get in touch today for a quote or use our concrete calculator to estimate how much concrete you need.