Enter your lawn dimensions, pick your lawn shape, and get an instant sod quantity in square metres and rolls. Waste allowance included. Works for rectangles, circles, L-shapes, and triangles — no maths required.
Get an accurate sod quantity in under two minutes. No maths, no guesswork, no wasted rolls.
Use a tape measure and record your lawn's length and width in metres. For irregular lawns, break the area into rectangular sections and measure each one separately. A 6m × 4m rectangle is 24 m² — the calculator handles the rest, including adding your chosen waste allowance. Measure twice before ordering — sod cannot be returned once it has been unrolled.
Takes 5 minutesSelect your lawn shape — rectangle, circle, L-shape, or triangle — and enter the measurements. Choose your sod roll size (most UK suppliers use 0.9 m² rolls, but check your supplier's spec sheet before ordering). The calculator adds a 10% waste allowance by default, which is sufficient for most straight-edged lawns. Increase this to 15% for curved edges or detailed landscaping.
Takes 1 minuteThe result shows your total lawn area in m², the area with waste added, and the exact number of rolls to order. It also converts to square feet so you can cross-check with suppliers who quote in imperial. Round up to the nearest whole roll — it is always better to have one roll spare than to run short on the last strip and need a second delivery.
Takes 30 secondsThe right sod depends on how the lawn is used. These are the 6 main types available from UK turf suppliers.
The 5 most common mistakes — and how to avoid them before you place your order.
Ordering the exact square meterage of your lawn with no waste allowance almost always results in running short. Every lawn has cuts around edges, curves, obstacles, and the occasional piece that splits during laying. A standard rectangle needs at least 5% extra. Anything with curves, planting areas cut out, or detailed edges needs 10–15%. Order the waste allowance — it is significantly cheaper to have one roll left over than to pay for a second small delivery.
Measure the bare soil area where you plan to lay sod — not the existing lawn surface. If your ground is uneven, compacted, or has significant slope, the actual area of soil to cover is effectively the same as the flat measurement, but you need to account for any areas you plan to raise or lower during preparation. Level the soil to within 15mm before laying — high spots create dry patches and low spots cause waterlogging at the joins.
Most UK sod rolls are 400mm wide and vary in length. Some suppliers offer wider rolls at 600mm. When your lawn width is not a round multiple of the roll width, you end up with narrow strips along one edge that are difficult to lay and prone to drying out. Where possible, orientate rolls so the joins run parallel to the longest dimension of the lawn — this minimises short end cuts and reduces the number of awkward narrow strips.
Sod laid directly onto compacted, stony, or waterlogged soil fails to root correctly regardless of quality. Prepare the soil to a depth of 100–150mm — break up compaction, remove stones larger than 20mm, and level to a firm, raked finish. Apply a pre-turfing fertiliser 48–72 hours before laying. The sod calculator gives you the right quantity, but the preparation underneath is what determines whether it roots or fails.
Newly laid sod needs watering within 30 minutes of being laid and then daily for the first two weeks in dry weather. Without consistent watering, the sod dries from the edges inward and fails to root. In hot dry weather — above 20°C with no rainfall — newly laid sod needs 20–25 litres of water per m² per week. Calculate your water requirement alongside your sod quantity if you are laying in summer.
Laying each row of sod in a straight line with joins aligned — like standard brickwork pattern but not offset — creates weak points that show as lines in the lawn during dry periods and are prone to cracking. Instead, lay each row offset by half a roll length, the same way bricks in a wall are staggered. This distributes the joins evenly across the lawn and produces a stronger, less visible join pattern.
What to do after laying to get your sod rooted and established as quickly as possible.
Water within 30 minutes of laying. Apply enough water to soak through the sod and into the top 50mm of soil — lift a corner to check. In warm weather, water daily in the morning. Avoid evening watering in warm conditions, which encourages fungal disease. In cool weather (below 12°C), watering every 2–3 days is usually sufficient. Do not let the sod dry out or curl at the edges — this indicates severe moisture stress.
Do not mow until the sod has rooted. Test by gently tugging a corner — it should resist. The first mow should remove no more than one third of the blade height. Set the mower high — 35–40mm for utility turf — and use a sharp blade. A blunt mower blade tears rather than cuts, damaging the new sod and creating an uneven surface. Wait for the sod surface to be firm enough to walk on without leaving impressions before mowing.
Reduce watering frequency as rooting progresses but increase the volume per session. By week 4, water every 3–4 days but apply enough to penetrate 100mm deep — this encourages deep rooting. Shallow frequent watering produces shallow roots that struggle in drought. From week 6, the lawn should be established enough to survive short dry periods without daily irrigation.
Keep off the lawn for the first 3 weeks except for essential maintenance. Light foot traffic — crossing to reach a gate, for example — is acceptable from week 2 if the sod is rooting well. Regular use should wait until after the third mow, when the sod is firmly rooted. Walking heavily on unrooted sod damages the joins, compresses the surface, and creates uneven areas that are difficult to correct later.
Apply a lawn starter fertiliser (high phosphorus, low nitrogen) at week 5–6 to encourage root development. Do not apply a high-nitrogen spring fertiliser in the first 6 weeks — too much nitrogen pushes rapid leafy top growth at the expense of root development. Water in the fertiliser after application if no rain is forecast within 24 hours.
Some patches may fail to root — particularly along edges and in areas with poor soil preparation. Small failed areas can be lifted, the soil beneath loosened and re-levelled, and a new piece of sod pressed firmly into place. For areas smaller than 0.3 m², overseeding with a matching grass seed mix is quicker and produces good results within 3–4 weeks in the growing season.
Answers to the most common questions about calculating, ordering, and laying sod in the UK.
Anyone ordering sod for the first time or planning a lawn renovation who wants an accurate roll count before calling a supplier.
Your plot is bare soil and you want a lawn quickly. This calculator gives you the roll count before you call a supplier so you can get a realistic cost estimate and order confidently without guessing. New builds typically have compacted, builder-grade topsoil — budget for soil improvement alongside the sod cost.
You have stripped out an old, worn lawn and are starting again. Measure the bare area, enter it here, and get your roll count. For partial renovations — replacing worn patches rather than the full lawn — enter each patch separately and add the totals.
Use the calculator to cross-check client quotes and job planning. The roll count and square footage conversion helps when suppliers quote in different units or when working across jobs with different roll sizes from different suppliers.
You want to know the cost before committing. Enter your dimensions, check the roll count, and get three supplier quotes using that figure. The waste allowance is already included so the number you see is what you order — not a minimum that leaves you short.
