Cubic yards vs bags: the conversion
One cubic yard is 27 cubic feet, which is roughly 36 of the 0.75 cu ft bags you find at the big box store, or about 54 of the 40 lb bags for topsoil. Past 2 cubic yards, bulk delivery almost always wins on price and back pain.
Swipe sideways to see every column.
| Area at 1/4 in deep | Cubic yards | 40 lb bags (topsoil) | Better buy |
|---|---|---|---|
| 1,000 sq ft | 0.8 cu yd | 47 bags | Bagged |
| 2,500 sq ft | 1.9 cu yd | 118 bags | Bulk |
| 5,000 sq ft | 3.9 cu yd | 235 bags | Bulk |
| 10,000 sq ft | 7.7 cu yd | 469 bags | Bulk |
| 20,000 sq ft | 15.4 cu yd | 938 bags | Bulk |
Depth drives everything. These rows assume a standard 1/4 inch topdressing pass; a 1/2 inch leveling pass doubles the volume, and a 2 inch fill for bare ground multiplies it by eight. Enter your real depth in the calculator for exact numbers priced to your region.
Topsoil, sand, or compost?
Match the material to the job, not the price. Sand levels, compost feeds, topsoil fills. Mixing jobs, like trying to level with compost, causes most of the problems people blame on topdressing.
- Sand, for leveling. It drags smoothly into low spots and never crusts, which is why it is the Bermuda and Zoysia leveling standard. Use masonry or leveling sand, not play sand, and only on warm-season lawns in summer.
- Compost, for feeding. A 1/4 inch pass adds organic matter and microbes and is the best surface to overseed into. It is too spongy for leveling on its own, because it decomposes and the bump comes back.
- Topsoil, for filling. This is the volume material: holes, trenches, raised beds, and anywhere you are reseeding from scratch. Buy screened; unscreened saves a few dollars and delivers rocks.
- 70/30 mix, for both. Seventy percent sand and thirty percent compost levels like sand while feeding a little like compost. It is the go-to for a leveling pass on an established lawn you also want to improve.
How to level a lawn with topdressing sand
Leveling is a slow, repeated process, not a one-time dump. Bury the grass and you start over; feather it in and the lawn grows through in days.
- Mow low and, for deeper dips, core-aerate first so the sand settles into the soil instead of sitting on thatch.
- Spread no more than 1/2 inch per pass. Anything thicker smothers the crowns and kills the grass you are trying to save.
- Drag it in with a leveling rake or lute until the blade tips show back through the sand across the whole area.
- Water lightly, then let the lawn grow and mow once before the next pass. On Bermuda or Zoysia in summer that is about every three to four weeks.
- Repeat until the low spots disappear. Deep areas take a full season of monthly passes, which is normal and far safer than one heavy fill.