Composite decking calculator
Use our composite decking calculator to get a quick estimation of how much decking you need to complete your project.
How much decking do I need?
It’s not always easy to work out how much decking you need. But with our handy composite decking calculator, you’ll find out how many boards and fixings you’ll require in seconds!
How to use the composite decking calculator
- Select the decking collection you’d like boards from in the drop-down menu.
- Input the length and width of your desired deck area.
- Let the calculator do the work! It’ll tell you the approximate number of composite decking boards and screws or clips you require.
Making the right
choice
You’ve got your estimation, so now it’s time for the next stages of the process.
Remember to order your free samples. This will help you make the best colour and finish choices for your deck.
Request your quote. Our team will put together an accurate quote for your project, from boards and fixings to balustrades and installation.
Get started. From here, you’re all set to start your outdoor transformation!
Useful tips when calculating decking
It’s an estimate
Remember that the figures shown by the calculator are only an estimate. For the most accurate calculation and to get a quote, please get in touch with our friendly team of experts.
Different boards = different fixings
Bear in mind that our Essentials, Heritage, Signature AT, and Signature HD collections of composite decking are all screw-fixed. The Evolution collection is our only clip-fixed system.
Our team is here to guide you on which type of decking is best for your application, and advise you on choosing the right fixings and accessories. There’s plenty of information in our guide, too: A complete guide to composite decking screws and clips.
Remember to account for wastage and installation mistakes
Sometimes, mistakes happen. To account for any installation errors or miscalculations, we advise you to add 5% wastage to the amount shown by the calculator, so you can feel confident that you’ll have enough materials to finish the job.
Ask for help
Need a hand? That’s what we’re here for. Whether you’ve got a question about the calculator or would like other support, please speak to our team.
Complete the look
You’ve chosen your favourite boards, you’ve calculated how many you need, but there are still a few pieces of the puzzle remaining. Your quality garden deck deserves quality accessories, and we’ve got all the choice you need to make your dream outdoor space.
For more guidance on the best accessories for your boards, please contact our team.
Ready-made decking kits
Did you know we offer ready-made deck kits? They’re ideal for savvy DIYers who are after a simple and easy home deck. Our standard kit produces a 2.4m x 2.4m deck and comes complete with everything you need for a speedy install (e.g. boards, screws, spacers).
You can also request a kit custom-made to the shape and size of your outdoor space by contacting our team.
Support for every project
Specifier resources
Download documents to support your specification.
Care and maintenance
Find out how to keep your composite decking in tip-top condition.
Composite decking calculator FAQs
What does the calculator show?
Our composite decking calculator will tell you:
- The total size of your deck area in square meters (m²)
- An estimation of the number of boards required
- An approximate number of boxes of screws or clips needed
When should I use a decking calculator?
As soon as you start thinking about replacing old decking or upgrading your garden with a new decked area! Knowing how many boards and fixtures you need to build the deck informs structural factors (like subframes) and logistics (for instance, cost, storage space, and time).
Can a composite decking calculator help me save money?
Most of the time, our customers see cost savings when they use our calculator. That’s because the estimation it gives prevents over-ordering (a waste of budget) and under-ordering, which tends to cost more in the long term.
To avoid this happening, use the calculator or speak with our team directly – we’re here to help you with every stage of your project.
Does the calculator account for custom board lengths?
Our calculator will approximate the number of standard 3.6m deck boards you need. If you’re interested in custom lengths (between 1.5m and 6m), please view our custom board lengths page or contact us directly for the most accurate calculation.
How do I calculate the number of decking boards required for my deck?
Use our decking calculator above to get an estimation of the number of boards you’ll need for your project. Make sure you have the length and width of the decked area to hand, as these form the foundations of the calculation.
For more support and advice, visit our resources.