Composite Decking Calculator
Before starting any composite decking project, it’s essential to ensure you have everything you need to avoid wasting money by over-buying or by having to order multiple times and possibly incurring multiple delivery charges. Our composite decking calculator makes it a simple process to work out the number of composite decking boards and other materials you will need, such as corner trims or end caps, as well as the estimated cost of it all. Start calculating your project now with our composite decking calculator.Select the shape that most closely matches your decking area. Exact dimensions are entered in the next step.
Enter each measurement in metres for your selected decking area.
Enter the dimensions that match each labelled measurement on the drawing.
Choose between our Classic and Premium composite decking ranges.
Choose a colour from your selected decking range.
Choose a decking frame and enter the finished decking height.
Measure from the supporting surface to the finished top of the decking.
Tell us whether any visible edges of your decking need covering.
Add together the length of every visible edge that needs covering and enter the total below.
Select the balustrade required around the decking area.
Enter the total length of balustrade required, followed by the number of continuous runs. A continuous run is one uninterrupted balustrade installation between two end posts and may include corners.
Add finishing products and upgrades. Each selection shows its additional price.

Heavy-duty permeable membrane to help prevent weeds growing beneath the decking.

Colour-matched push-fit caps for the calculated number of visible hollow board ends.

Supports the raised aluminium frame at the calculated finished decking height.

Push-fit caps supplied in packs of 10 to finish the calculated exposed aluminium joist ends.

Upgrade from standard 6mm fixings to 3mm hidden fixings for a tighter, cleaner board gap.

Flexible weather-resistant adhesive used to secure edging trims to the decking.

Compatible with Dino 3mm, 6mm and starter fasteners for secure installation using a drill or screwdriver.
This balustrade cannot be calculated accurately online. Please save the quote and call the office on 01942 355968. Alternatively, add the calculated decking items to your basket without the glass and balustrade.
Includes 5% wastage.
How to Use Our Composite Decking Calculator
1. Choose the shape of your decking
Our composite decking calculator provides numerous shape options to get you started.1. Enter Your Measurements Into the Composite Decking Calculator
Depending on the shape chosen you will need to measure the length of certain sides of the area you wish to calculate the composite decking for.2. Select the Decking Range You’d Like to Use
Choose from our classic or premium composite decking ranges, depending on your style preferences and budget. Both provide great performance and durability but the Premium decking features our advanced Dino Shield™ technology. This provides increased resistance to moisture, staining, algae and mould, along with added UV protection to reduce colour fade. To test out our composite decking, make sure to get a free sample.3. Select Any Additional Features for Your Composite Deck
Add any necessary decking accessories to the composite decking calculator that will complete your decking project. This can include items like hidden fasteners to ensure a clean, seamless finish.4. Review Your Materials List & Estimated Cost
Our composite decking calculator will provide a breakdown of the required materials, including the number of composite decking boards, fixing clips, and composite joists to build a decking frame and accessories like fascia boards and bullnose edging. It will also provide an estimated total cost of your project.5. Add the Items to Your Basket or Save Your Quote for Later
Once you’re satisfied with the results, you can download the detailed materials list from the composite decking calculator or share it directly with our team for a final quote and delivery options.Why Choose Dino Decking for Your Composite Decking Project?
Our attractive and long-lasting composite decking has several benefits compared to traditional timber decking. The combination of recycled wood fibres and plastic materials makes it a tough and durable choice, which is why it comes with a 10-year warranty. It is custom-designed to resist warping, insect infestation, rotting and splintering, and the surface is resistant to mould and mildew. It also looks great and comes in various colours and easy-to-clean non-slip finishes. It’s eco-friendly (with less demand for virgin timber) and versatile. As the UK’s leading composite decking supplier, we can provide everything you need for your decking project, with fast delivery, and competitive prices. Our expert team is always on hand to contact if you need advice. Find your composite decking and get started on your project today.Composite Decking Calculator FAQs
How accurate is Dino's composite decking calculator?
Our decking cost calculator is designed to give you an accurate estimate based on the dimensions you enter and the materials you select. Based on those figures it provides a precise calculation of the number of boards, accessories and cost of materials. However, actual material needs – and costs – can vary depending on factors such as wastage and unconventional deck shapes. We recommend adding 5-10% to the number of decking boards you order to account for these factors and any cuts you may need to make for a perfect fit.
How many lengths of composite decking do I need to build a deck?
To build a composite deck, the number of decking boards you need will, of course, depend on the size of your project. Simply enter the dimensions of the planned decking area into our composite decking cost calculator, and it will indicate how many boards you need based on those figures. It is generally best to round up and add 5-10% more boards to allow for wastage and offcuts.
What size are your composite decking boards?
What is the difference between wood and composite decking?
Our composite decking is made from a blend of recycled wood fibres and plastic, which provides a more durable, low-maintenance option compared to traditional timber. It is engineered to be resistant to rot, warping and weather damage, making it a great long-lasting choice for your outdoor spaces. Read more in our composite decking vs traditional wood post.
What is the difference between the classic and premium ranges?
Both ranges are tough, durable and attractive, creating stunning decks that come with a 10-year guarantee. The Premium range also features our Dino Shield™ Technology, which provides even greater weather protection, increased resistance to stains, mould and algae and added UV protection to help prevent colour fade.
Can the Dino decking calculator provide an installation cost estimate?
Many people choose to install their own decking but others might want to employ a professional installer, especially for more complex decking projects. Our composite decking cost calculator is great for providing an estimate of the price of the materials required to complete your decking project; however, as Dino Decking does not provide installation, this is not included in the price.
Installation fees vary depending not only on the size of the deck but also on factors such as the complexity of the layout and local labour rates. We recommend contacting a professional decking installer to assess your project and provide a detailed cost breakdown before ordering materials.