Turf calculator
Work out how many turf rolls you need to lay a new lawn, from its area and a waste allowance for cutting and edges.
Result
Turf rolls required
How to use this tool
- Measure the length and width of the lawn area.
- Set a waste allowance that reflects your lawn shape and cutting plan; the default is an editable example, not a universal rate.
- Read the number of turf rolls to order.
Assumptions
- Coverage per roll defaults to 1m². Roll dimensions and stated coverage vary by supplier and market; enter the figure for the product you plan to order.
- The lawn is treated as a rectangle; for an irregular lawn, split it into rectangles and add the results, or measure the overall bounding rectangle and raise the waste allowance.
Technical details: what the fields mean
- Length
length - The longest side of the lawn area.
- Width
width - The other side of the lawn area.
- Waste allowance
wastePercent - Extra to cover cut edges and offcuts around borders and curves.
- Coverage per roll (from supplier)
rollCoverageM2 - The area one roll covers, as stated on the supplier's listing. If only dimensions are given, multiply them (e.g. 1.64m × 0.61m ≈ 1m²). Big rolls for large lawns cover much more.
Methodology
Rolls required = (length × width × (1 + waste%)) ÷ coverage per roll, rounded up to whole rolls. Coverage defaults to 1m² as an editable example; enter your supplier's figure.
Worked example
8m × 5m lawn, 10% allowance, 1m² rolls
Inputs: Length: 8 m, Width: 5 m, Waste allowance: 10%, Coverage per roll (from supplier): 1 m²
Result: 44 rolls.
Same lawn with a supplier whose rolls cover 0.6m² each
Inputs: Length: 8 m, Width: 5 m, Waste allowance: 10%, Coverage per roll (from supplier): 0.6 m²
Result: 74 rolls — ordering 44 here would leave you about 40% short, which is why the coverage figure matters more than the roll count.
Practical guidance
- Lay turf within 24–48 hours of delivery — it deteriorates quickly once rolled.
- Stagger the joints between rolls like brickwork for a stronger, less visible finish.
Common mistakes
- Leaving turf rolled up for more than a day or two before laying, which can kill the grass underneath.
- Under-ordering for a lawn with lots of curves or borders, which increases cutting waste.
FAQs
How many turf rolls do I need for an 8m x 5m lawn?
With a 10% allowance and 1m² rolls, 44 rolls. If your supplier's rolls cover a different area, enter it in the coverage field — at 0.6m² per roll the same lawn needs 74.
Should I order turf by the roll or by the square metre?
Many suppliers price per m² and deliver whole rolls. Enter their coverage per roll here so the roll count matches what will actually arrive.
How soon should I lay turf after delivery?
Within 24–48 hours — turf deteriorates quickly once rolled up.
Last reviewed: 2026-10-11
Treats the lawn as a rectangle and relies on the coverage-per-roll figure you enter — check it against your supplier's listing before ordering.
This tool provides an indicative estimate, based on the assumptions stated above.
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