Answer first
What this calculator tells you
Calculate the number of sod rolls needed to cover a lawn, with a waste allowance. Order enough sod to finish the job in one delivery, because it must be laid fresh. Formula: Rolls = ⌈area × (1 + waste) ÷ roll area⌉. At the worked-example inputs, the rolls needed is 126. Holding every other input steady, moving area to cover (sq ft) from 960 to 1,440 moves the result from 101 to 152.
Transparent method
The formula
Order enough sod to finish the job in one delivery, because it must be laid fresh.
Worked example
Example inputs
How to interpret the result
Sod comes in rolls or slabs of a set size, and the count is area over roll area, plus a little for cuts. A 1,200 square foot lawn with 5 percent waste is 1,260 square feet, which takes 126 rolls of 10 square feet.
At the worked-example inputs the rolls needed is 126. It rises with area to cover (sq ft) and waste allowance and falls as sod roll size (sq ft) increases.
These are quantity estimates from the area and depth you enter. Real yards have slopes, curves and settling, and bulk materials vary in weight with moisture, so order a little extra and confirm coverage, bag sizes and rates with the product label or your supplier. Fertilizer and seed rates depend on your grass, soil and region, so follow the label and your local extension office.
Before you rely on it
What to check
Confirm the roll size with the grower. A slab may cover 10 square feet or a big roll may cover 50, and the count changes with it.
The common error
Where people go wrong with sod calculator
Letting it sit. Fresh sod starts to heat and yellow within about a day in warm weather, so schedule the delivery for the day you lay it.
Sensitivity evidence
How area to cover (sq ft) changes the rolls needed
Holding every other input at the worked-example value, moving area to cover (sq ft) from 960 to 1,440 moves the rolls needed from 101 to 152: a spread of 51, or 40% of the worked-example result.
| Area to cover (sq ft) | Rolls needed | Area including waste (sq ft) |
|---|---|---|
| 960 | 101 | 1,008 |
| 1,080 | 114 | 1,134 |
| 1,200worked example | 126 | 1,260 |
| 1,320 | 139 | 1,386 |
| 1,440 | 152 | 1,512 |
Every input, tested
Which input moves the rolls needed most
Of the 3 inputs, area to cover (sq ft) moves the rolls needed most (25 across the range tested) and waste allowance moves it least (3).
| Input | Tested from | To | Rolls needed at each end | Swing |
|---|---|---|---|---|
| Area to cover (sq ft) | 1,080 | 1,320 | 114 to 139 | 25 (20%) |
| Sod roll size (sq ft) | 9 | 11 | 140 to 115 | 25 (20%) |
| Waste allowance | 4.0% | 6.0% | 125 to 128 | 3 (2.4%) |
Two variables at once
Rolls needed by area to cover (sq ft) and sod roll size (sq ft)
Across the grid the rolls needed runs from 84 to 189. Moving area to cover (sq ft) from 960 to 1,440 shifts it by 51 at the middle column, and moving sod roll size (sq ft) from 8 to 12 shifts it by 53 at the middle row, so sod roll size (sq ft) is the bigger lever here.
| Area to cover (sq ft) \ Sod roll size (sq ft) | 8 | 10 | 12 |
|---|---|---|---|
| 960 | 126 | 101 | 84 |
| 1,080 | 142 | 114 | 95 |
| 1,200 | 158 | 126 | 105 |
| 1,320 | 174 | 139 | 116 |
| 1,440 | 189 | 152 | 126 |
The highlighted cell is the worked example: 126.
Step by step
The worked example, input by input
| Input | Value used | What it means |
|---|---|---|
| Area to cover (sq ft) | 1,200 | Enter the area to cover (sq ft) used in this calculation. |
| Sod roll size (sq ft) | 10 | A common roll covers 10 square feet, and sizes vary by grower. |
| Waste allowance | 5.0% | Cuts at edges and curves. |
| Rolls needed | 126 | |
| Area including waste (sq ft) | 1,260 | |
Inputs, definitions and assumptions
Area to cover (sq ft)
Enter the area to cover (sq ft) used in this calculation. The prefilled worked-example value is 1,200.
Sod roll size (sq ft)
A common roll covers 10 square feet, and sizes vary by grower. The prefilled worked-example value is 10.
Waste allowance
Cuts at edges and curves. The prefilled worked-example value is 5.0%.
How to use this calculator
- 1Verify the inputs. Gather area to cover (sq ft), sod roll size (sq ft) and waste allowance from your own documents; the prefilled values are examples.
- 2Save a baseline. The worked example puts the rolls needed at 126. Store your own version of it as Scenario A.
- 3Test one change. Start with area to cover (sq ft), the input with the biggest effect here: moving area to cover (sq ft) from 1,080 to 1,320 takes the rolls needed from 114 to 139, a swing of 20% of the worked-example figure.
- 4Check the extremes. At half the example area to cover (sq ft) (600) the rolls needed is 63; at double (2,400) it is 252.
People also ask
Frequently asked questions
How do you calculate sod?
Rolls = ⌈area × (1 + waste) ÷ roll area⌉. Enter waste allowance in percent (5 means 5%). At the worked-example inputs the rolls needed is 126.
What does the sod result mean?
Order enough sod to finish the job in one delivery, because it must be laid fresh. At the worked-example inputs the rolls needed is 126. It rises with area to cover (sq ft) and waste allowance and falls as sod roll size (sq ft) increases.
How much does area to cover (sq ft) change the rolls needed?
Holding every other input at the worked-example value, moving area to cover (sq ft) from 960 to 1,440 moves the rolls needed from 101 to 152, a spread of 51.
What are the limits of this sod calculator?
These are quantity estimates from the area and depth you enter. Real yards have slopes, curves and settling, and bulk materials vary in weight with moisture, so order a little extra and confirm coverage, bag sizes and rates with the product label or your supplier. Fertilizer and seed rates depend on your grass, soil and region, so follow the label and your local extension office. The tables on this page test area to cover (sq ft) only from 960 to 1,440; a value outside that range is not tabulated here.
Which input moves the rolls needed most in the sod calculator?
Ranked by how far each moves the rolls needed across the range tested: area to cover (sq ft) (25, 20%), sod roll size (sq ft) (25, 20%) and waste allowance (3, 2.4%).
If I double area to cover (sq ft) in the sod calculator, does the rolls needed double?
Doubling it from 1,200 to 2,400 takes the rolls needed from 126 to 252, which is 2.00 times the worked-example figure. So the result scales almost exactly in proportion. Halving it to 600 gives 63.
How much does sod roll size (sq ft) matter in the sod calculator?
The worked example uses 10. Holding every other input at its worked-example value, moving sod roll size (sq ft) from 9 to 11 takes the rolls needed from 140 to 115, a swing of 20% of the worked-example figure.
How much does waste allowance matter in the sod calculator?
The worked example uses 5.0%. With the other inputs left at the worked example, moving waste allowance from 4.0% to 6.0% takes the rolls needed from 125 to 128, a swing of 2.4% of the worked-example figure.
Which inputs change the area including waste (sq ft) in the sod calculator?
At the worked-example inputs it is 1,260. Area to cover (sq ft) takes it from 1,134 to 1,386 and waste allowance takes it from 1,248 to 1,272.
How deep should mulch be?
About 2 to 3 inches for most beds. Under 2 inches lets weeds through, and over 4 inches can smother roots and hold too much moisture. Keep it a few inches back from trunks and stems.
How many square feet does a cubic yard cover?
A cubic yard covers 324 square feet at 1 inch deep, 162 at 2 inches, 108 at 3 inches and 81 at 4 inches. The calculator does this for any area and depth.
Is it cheaper to buy in bulk or in bags?
Usually bulk once you pass about a cubic yard, which is 13 or 14 two-cubic-foot bags. Bags cost more per yard but are easier to carry and store, and bulk needs a delivery spot.
Sources and evidence
Free Calculators Online is independent and is not affiliated with or endorsed by the source organizations. Educational estimates only.