Use this decking calculator to estimate the number of decking boards and total cost needed for your outdoor decking project.
Decking Calculator Ireland – Estimate Decking Boards & Cost
Planning a decking project for your garden or outdoor space? Our Decking Calculator Ireland helps you quickly calculate the decking area, number of decking boards required, and the estimated total cost — all in just a few clicks.
Whether you’re installing timber decking or composite decking, this free online tool makes it easy to plan your materials accurately and avoid unnecessary waste or overspending.
For more renovation and DIY tools, check out our home improvement cost estimators designed for Irish homeowners.
What Is a Decking Calculator?
A decking calculator is an online tool designed to estimate how much decking material you need based on the size of your deck and the dimensions of your decking boards.
Our decking boards calculator calculates:
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Total decking area in square metres (m²)
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Number of decking boards required
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Approximate total cost based on price per board
This calculator is ideal for homeowners, DIY enthusiasts, landscapers, and contractors in Ireland who want fast and reliable estimates before starting a decking project.
You can also go through - Tarmac Driveway Cost Calculator Ireland
How to Use the Decking Calculator
Using the decking calculator is simple and takes less than a minute:
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Enter the deck length in metres
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Enter the deck width in metres
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Input the deck board width in millimetres
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Enter the deck board length in metres
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Add the cost per decking board (€)
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Click Calculate Decking
The calculator will instantly show:
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Total deck area (m²)
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Number of boards required
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Estimated total decking cost (€)
How Does the Decking Calculator Work?
The calculator works by calculating the total deck surface area and dividing it by the surface area of a single decking board.
Calculation Logic:
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Deck Area = Length × Width
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Board Area = Board Width × Board Length
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Boards Required = Deck Area ÷ Board Area
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Total Cost = Boards Required × Cost Per Board
All measurements are calculated using metric units, which are standard in Ireland, ensuring accurate and realistic results.
Why Use This Decking Calculator?
Using our Decking Cost Calculator Ireland offers several advantages:
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✅ Saves time compared to manual calculations
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✅ Reduces material wastage
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✅ Helps plan your budget accurately
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✅ Suitable for timber and composite decking
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✅ Ireland-friendly metric measurements
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✅ Free, fast, and easy to use
Whether you’re upgrading your garden, patio, or outdoor seating area, this calculator helps you make informed decisions before purchasing materials.
Who Is This Decking Calculator For?
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Homeowners planning garden decking
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DIY decking projects
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Builders and landscapers
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Property renovators
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Anyone estimating decking material costs in Ireland
Frequently Asked Questions (FAQ)
How accurate is the decking calculator?
The calculator provides accurate estimates based on the inputs provided. For best results, always double-check board dimensions and consider adding extra boards for cutting waste.
Does the calculator include wastage?
The current estimate does not automatically include wastage. It’s recommended to add 5–10% extra decking boards to account for cuts, mistakes, and layout adjustments.
Can I use this calculator for composite decking?
Yes, this calculator works for both timber decking and composite decking, as long as you enter the correct board dimensions and price.
What units does the decking calculator use?
The calculator uses metres (m), millimetres (mm), and square metres (m²) — standard units used in Ireland.
Does this calculator include labour costs?
No, the calculator estimates material quantities and cost only. Labour costs vary depending on installer, location, and project complexity.