Topsoil bags vs bulk delivery: which to buy
How to decide between bagged topsoil and a bulk yard, using bag count, weight, and the break-even point this calculator reveals.
Reading the bag count as a decision tool
The bag figure this calculator returns is more than a shopping number, it is a signal about how you should buy. A single 0.75 cubic foot bag covers very little ground, so once a project pushes past a cubic yard the bag count climbs fast. A 20 by 10 foot bed at 6 inches deep needs 134 bags, which is roughly 3.7 cubic yards. Lifting, hauling, and opening well over a hundred bags is slow and awkward, and the per yard price of bagged soil is usually higher than bulk. When the count runs into the dozens, that is your cue to price a bulk delivery instead.
What a bulk yard actually looks like
Bulk topsoil is sold by the cubic yard and dumped as a loose pile, either in a truck bed or on a driveway. One cubic yard is 27 cubic feet, the same volume as 36 of the 0.75 cubic foot bags. It also weighs a lot: at the 1.08 tons per cubic yard this tool assumes, three or four yards is several thousand pounds, so plan where the pile lands and how far you will wheelbarrow it. Bulk avoids plastic waste and lowers the price per yard, but you trade that for the labor of moving a heavy heap and the mess of a temporary pile.
Finding your break-even point
The practical break-even sits where delivery fees and the hassle of a pile are outweighed by the savings over bags. Many suppliers set a delivery minimum of one or two cubic yards, so smaller jobs often stay bagged by default. Run your real dimensions through the calculator first, then compare the bag count times the bag price against the yardage times the bulk price plus delivery. If the bag total is meaningfully higher, or if the bag count is simply too many to carry, bulk wins. For a single raised bed of a yard or less, bags usually stay the sensible choice.
Ordering the right amount either way
Whichever route you pick, add a margin. Freshly spread topsoil settles once it is watered and walked on, and few beds are perfectly flat, so the exact volume tends to fall a little short in practice. A 5 to 10 percent buffer covers settling and uneven ground without leaving a large surplus. With bags that means rounding up a few units, and with bulk it often means bumping a 3.7 yard job up to 4 yards. It is cheaper to have a small leftover pile than to reorder and pay a second delivery fee.