SOD
Sod calculator
Sod is ordered by area, not by volume — so the calculation is net square feet plus a waste allowance. There is no depth input and no cubic yards, because a roll of sod is already the finished thickness. This page covers the area arithmetic, the waste figure, and the one number you must get from your supplier.
The area calculation
Measure the lawn as simple shapes and add them:
- Rectangle:
length × width - Circle:
π × radius² - Triangle:
base × height ÷ 2
Then subtract anything that will not be sodded — a patio, a pathway, a planting bed, a tree ring. A 1 ft diameter tree ring is 3.1416 × 0.5² = 0.79 sq ft; four of them is 3.14 sq ft, which is small on a big lawn and relevant on a small one.
Worked example
A front lawn of 40 ft × 25 ft, with a 6 ft × 12 ft bed and one 2 ft diameter tree to leave out:
- Outer area: 40 × 25 = 1,000.00 sq ft
- Less the bed: 6 × 12 = 72.00 sq ft
- Less the tree ring: 3.1416 × 1² = 3.14 sq ft
- Net area: 924.86 sq ft
The waste allowance, and why you decide it
Sod is cut and laid in pieces, so edges need trimming and odd shapes generate offcuts that cannot always be reused. A commonly used planning allowance is 5 to 10 percent on top of the net area — 5 percent for a simple rectangle, more for curves and multiple isolated shapes. On the example above, 5 percent is 46.24 sq ft and 10 percent is 92.49 sq ft, giving an order of about 971 to 1,017 sq ft.
That range is a planning convention for covering offcuts: Mississippi State University Extension's sod publication advises buying approximately 5 percent more sod than you think you'll need, and the upper end is a working margin for curves and multiple isolated shapes. Take the supplier's advice if your site is unusual. What matters is that the allowance is applied once, to the total, rather than per shape.
The one number that has to come from your supplier
Rolls and pallets per square foot. Sod is sold by the piece, the roll or the pallet, and the coverage of a pallet is set by the grower and the cut size — it is not a universal constant, and it differs between sod types and between suppliers in the same market. Some suppliers list it as square feet per pallet, some as pieces per pallet with a piece size, and some quote by the square foot directly.
So this calculator deliberately does not print a pallet figure. Get the coverage for the exact product you are buying, then divide: pallets = ceiling(order square feet ÷ square feet per pallet). If a listing says 500 sq ft per pallet, the example above is ceiling(971 ÷ 500) = 2 pallets; if it says 450, that is ceiling(971 ÷ 450) = 3. Two pallets and three pallets for the same lawn, decided entirely by the supplier's own number.
Before you order
- Measure the finished lawn, not the lot. Fences, driveways and beds all come off.
- Check the delivery weight and access. Sod is heavy and is usually delivered on pallets that need firm, level ground.
- Order and lay on the same day where you can. Sod is a living product; the shorter it sits rolled, the better it takes.
- Ask what the pallet covers and what the minimum order is. Those two answers decide the final number, not the arithmetic.
Related calculators
The coverage calculator does the same subtraction of a circular bare spot from a rectangular area, and the measure-to-order worksheet walks through the same measure-then-convert habit for beds. If you are top-dressing before laying sod, the topsoil calculator handles the volume side.
Sources: Mississippi State University Extension Service, Publication 2951 Sod Installation and Maintenance, page opened and read directly on 2026-09-21 — the approximately 5 percent allowance and the 450 to 500 sq ft pallet range. Individual grower figures for pallet coverage are on how many square feet in a pallet of sod.
Cite this dataset
The mulch coverage, bag-count and dated price tables from this site are archived as a citable dataset: Mulch coverage, bag-count and dated bulk price tables, version v1, published 20 September 2026, 9 files, creator ERTHK — DOI 10.5281/zenodo.22855990, record at zenodo.org/records/22855990.
Released under CC0 1.0 Universal (Creative Commons Zero v1.0 Universal): free to copy, modify and redistribute.
The source library that generates the tables, with its test suite, is at github.com/ERTHK/mulch-measure-calculator-kit, released under the MIT license.