Turf is a perishable product with a delivery window. Order too little and the job stops; order too much and you are shifting a pallet of rotting grass within four days. This draws the lawn, converts the area into the roll size your supplier actually stocks, adds the cutting margin the shape demands, and tells you how many pallets that works out to — which is what the haulage is charged on.
The lawn to turf
Pick the shape, then the roll size your supplier sells.
Fine tuning
7% on a rectangle with straight beds, 15% where the edges curve.
Result
Turf is the only landscaping material with a shelf life
Everything else in a garden can sit in a corner for a month. Turf cannot. It is cut, rolled, stacked on a pallet and starts heating from the middle within a day; by day four in warm weather the rolls at the centre of the pallet are yellowing and by day six they are compost. This is not a material you can over-order as insurance.
That makes the quantity calculation genuinely load-bearing in a way it is not for slabs or mulch. Order the right amount, on the day, for a lawn that has been prepared and is ready to receive it — because the delivery window and the preparation schedule have to meet, and the number of rolls is what makes them meet.
Rolls are not square metres
Turf is sold in rolls of a fixed width and length, and the roll size varies between suppliers: 0.6 m wide rolls are the domestic standard, 1.2 m wide rolls are used on larger jobs because they lay faster and have fewer joins. The area per roll follows from that, and it is the number you divide by.
What matters is that the roll has a shape as well as an area. A 0.6 × 1.7 m roll covers 1.02 m², but it covers it as a strip, and strips only tile a rectangle cleanly when the rectangle's dimensions happen to be near multiples of the strip. Every departure from that is a cut, and a cut leaves an offcut that is only reusable if it is at least a third of a roll.
| Edge | Margin | Why |
|---|---|---|
| Straight edge against paving | 5 to 7% | One clean cut per row, offcuts usually reusable |
| Straight edge against a wall | 7% | Same, plus the slight wobble in the wall line |
| Curved bed, gentle radius | 12 to 15% | Every row is cut to a different length |
| Tight curves and circles | 20 to 25% | Offcuts are short and mostly unusable |
| Around trees and obstacles | 15% | Each obstacle costs a cut that fits nowhere else |
| Diagonal to the longest side | 15% | Both ends of every row are cut |
Start against a straight run of paving or a path, not against a curved bed. The first row sets the direction for everything behind it, and starting on a curve means every subsequent row inherits an angled cut at its far end.
Stagger the joints between rows by half a roll, the way you would brickwork. Butt-jointed turf shrinks at the seams over the first dry spell and leaves gaps that never close.
Measuring, then preparing, then ordering
The order of operations matters more than the precision. Turf is ordered for a specific day, so the ground has to be ready before you know the exact area — which means measuring early, then re-measuring once the beds are marked out and the levels are set.
- Measure the outline earlyCanes and a tape, twice, taking the smaller reading. This gives you a provisional roll count for budgeting and for booking the delivery slot.
- Mark the beds and obstaclesString or sand, not a plan in your head. Curves drawn on the ground are the difference between a 7% margin and a 20% one.
- Re-measure once it is set outThe second measurement, after the shape is decided, is the one you order from. Beds always end up bigger than intended.
- Check the roll size with the supplierNot the website. Domestic suppliers change roll length between farms, and 1.02 m² versus 0.84 m² is a 20% difference in roll count.
- Book the delivery for the laying dayTurf is delivered on a pallet by a lorry with a tail-lift. It goes down the same day, or it goes off.
Do
- Measure twice, once before and once after the beds are marked out.
- Confirm the roll size with the actual supplier before dividing.
- Start laying from the longest straight edge you have.
- Stagger joints between rows and butt the ends tightly.
Avoid
- Ordering on a plan measurement taken before the beds were set out.
- Assuming all suppliers sell the same roll size.
- Leaving turf stacked on the pallet overnight in warm weather.
- Cutting curves first and then trying to square the rest of the lawn to them.
What the area turns into, beyond the rolls
The roll count is the headline, but the same area drives the preparation quantities, which are usually the bigger part of the bill. Topsoil, if the levels need lifting; sharp sand, if they need levelling; and the seed and fertiliser that follow the turf for the first season.
The lawn area calculator works the same geometry out with an allowance for what is inside the lawn and a mowing time attached, which is worth doing before you commit to the area at all. The garden area calculator covers the tapered shapes this one leaves out, and the fertiliser calculator picks up from square metres once the turf is down and growing. Where the alternative is seed rather than turf, the seed quantity calculator works from the same figure.
A worked example
A straightforward rectangle, which is where most people start and where the margin is smallest.
- Area10 m by 8 m is 80.00 m², with 36 m of edge.
- MarginStraight edges against paving on two sides, so 10%: 88.00 m² to order.
- RollsAt 1.02 m² per roll, 88.00 ÷ 1.02 = 86.3, so 87 rolls.
- Pallets88 m² against roughly 60 m² per pallet means 2 pallets, and that is what the haulage is quoted on.
- Sanity check87 rolls is 88.7 m² of turf for an 80 m² lawn. If that looks like a lot, remember that the offcuts are small, curved and unusable, and that a short delivery stops the job.
Not all turf is the same product
Turf is sold by area, but what you are buying is a grass species mix on a thickness of soil, and both vary. A fine ornamental lawn mix is grown thin, on sandy soil, and is lighter to handle and quicker to root. A hard-wearing family mix is thicker, heavier, takes longer to knit and survives being played on. Neither changes the roll count, but they change the weight of the pallet, the speed it roots and the price per square metre.
Looks like a bowling green, behaves like one
- Thin cut, roots fast, light to carry.
- Needs regular mowing and feeding to stay fine.
- Poor choice where children or dogs are involved.
The default for a reason
- Ryegrass content, thicker cut, recovers from damage.
- Heavier rolls, slower to root, more water in week one.
- Handles shade and neglect better than fine mixes.
For the north side
- Fescue-heavy mixes that cope with four hours of light.
- Slower growing, which is the trade for tolerance.
- Still needs some direct sun; nothing grows in deep shade.
The soil thickness on the roll matters more than the species when you are laying in summer. Thin-cut turf on sandy soil dries out in hours and needs watering twice a day for the first week. Thick-cut turf holds moisture but is heavy, and its roots take longer to reach the soil underneath, so it can look established while sitting loose.
The first six weeks decide the next ten years
Turf either knits or it does not, and the difference is made in the fortnight after laying. The area calculation is finished by then; the watering is not.
Heavy enough to soak through the roll into the soil below. The test is lifting a corner: if the underside is dry, it was not enough.
Daily in warm weather, twice a day on thin-cut turf. The roots are in the top 20 mm and have nothing else to draw on.
When it resists a gentle tug. Set the blades high and take no more than a third off; cutting wet turf tears it.
A light nitrogen feed. Any seam that has opened more than a few millimetres needs brushing with soil, or it will not close.
Normal mowing, normal watering. Root depth by now is 50 to 75 mm and it will start to look after itself.
Turf laid onto ground that was rotovated the same day sinks as the soil settles, and within a month the surface is a series of shallow dips that hold water and scald in sun.
Prepare, let it settle for a week, consolidate with a roller, then lay. That week is worth more than any of the numbers on this page.
Where the numbers stop being true
The pallet figure assumes about 60 m² to a pallet, which is typical for rolled domestic turf and varies with roll size and the haulier. It is there to tell you how many pallet spaces the delivery needs and what the haulage will be, not to be a precise count — the supplier will confirm it when you book.
The cutting margin is an average, not a measurement. If you want the real figure, set the lawn out with string, walk the perimeter with a tape, and count how many row-ends will need a cut. On a lawn with a single straight edge and one gentle curve, you will land near the 12% mark; on one with four tree pits, nearer 20%.
Before you book the delivery
- Measure the outline twice and take the smaller reading.
- Mark beds and curves on the ground before you trust the margin.
- Confirm the roll size with the supplier, not the website.
- Set the margin from the edges you will actually be cutting against.
- Have the ground prepared and levelled before the delivery date.
- Check the pallet count against the access; a pallet needs about 1.2 m of width.
How the arithmetic works
Area comes from the shape: width × length, or outline minus notch, or π × (diameter ÷ 2)², or half × base × height. Area to order is area × (1 + margin ÷ 100). Rolls are that figure divided by the roll area, rounded up, because a part roll is still a roll and turf cannot be bought by the square metre.
Pallets are the order area divided by 60 m², rounded up. The edge run is the perimeter: 2 × (width + length) for a rectangle and an L shape alike, π × diameter for a circle, and base plus twice the sloping side for a triangle.
Questions people ask
How soon does turf have to be laid?
The same day it arrives, in practice. In cool overcast weather you have 48 hours; in warm sun, less. Unroll it if it must wait overnight, and water the stack — heat builds from the middle of the roll and that is where it dies first.
Should I buy seed instead?
If you can wait a season and keep it watered, seed is a fraction of the price and gives a better root system. If you need a lawn by next month, or the site is on a slope that will wash, turf wins. Nothing else about the calculation changes.
Can I over-order and use the spare elsewhere?
Only if you can lay it the same day. Turf does not keep. A few spare rolls are worth having for repairs, laid in a corner and moved later; a pallet of spare is a disposal problem.
What about the soil underneath?
Turf roots into the top 50 mm and no deeper for the first fortnight, so the surface has to be right: firm, level, moist and free of stones. Working the area out is the easy part; preparing it to that standard is the actual work.
Do I need to water it immediately?
Within the hour in warm weather, and heavily — the point is to cool the roots and make contact with the soil, not to green it up. Light watering daily for the first fortnight beats one deep soak.
How accurate is the pallet figure?
Good enough for quoting haulage and checking access. Suppliers vary between about 50 and 70 m² per pallet, so treat it as a two-pallet answer when the area is anywhere near the boundary, and confirm when you book.