Pop in your garden size and we'll tell you exactly how much to buy — plus a tick-off shopping list for everything else. Free and instant.
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Most UK suppliers stock 2m and 4m rolls; 5m is available from some.
Enter your length and width above to see your result. 👆
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Estimates based on typical UK prices — always confirm with the retailer before ordering. How we estimate.
Measure the length and width of your lawn and pick the longest and shortest sides — in metres or feet, whichever you prefer (use the toggle). Always round up. Artificial grass comes on fixed-width rolls — usually 2m or 4m wide in the UK — and is cut to length off the roll, so you pay for the full roll width even if your garden is narrower. That's why a 4.2m-wide garden can need a surprising amount of grass — and why a quick length × width sum leaves you short.
Grass uses the price-per-m² you choose, multiplied by the area you actually buy off the roll. Materials use typical UK rates: weed membrane ~£1.50/m², foam underlay ~£3/m², kiln-dried sand ~£2/m², a fitting kit around £45, and an optional sub-base around £9/m². The "professional" figure is a typical UK supply-and-fit range of roughly £45–£70/m². These are guides to help you budget, not formal quotes.
On soil or an old lawn you dig out, lay a compacted sub-base and sharp sand to create a firm, level bed, then a weed-control membrane before the grass. On a hard surface like concrete, a patio or decking, you skip the groundwork and lay a foam shockpad underlay instead. Choose your surface above and the calculator updates the materials and cost.
For your measurements we work out the cost on a 2m, 4m and 5m roll, then recommend whichever buys the least total grass — because a wider roll means fewer joins but can waste more, and the cheapest option depends on your exact size.
Shorter piles (around 20mm) are cheaper and hard-wearing; mid piles (around 30mm) look the most natural for most gardens; longer, denser piles (35–40mm) feel luxurious and are often marketed as pet-friendly. Our Budget / Standard / Premium tiers map roughly to these.