Topsoil Volume Calculator

Volume Needed is pure geometry — length times width times depth — and doesn't care what the material weighs, so a lighter, more organic-rich topsoil and a heavier, sandier topsoil both need the same cubic yardage to cover the same area at the same depth. Weight, on the other hand, is that same volume multiplied by however many pounds each cubic foot of your specific soil weighs, so a denser soil blend weighs noticeably more for the identical volume — useful to know since some delivery trucks and equipment have weight limits independent of their volume capacity.

A brand-new lawn being seeded or sodded over bare or graded ground typically needs 4-6 inches of topsoil to give grass roots enough depth to establish well, while topdressing an already-established lawn to improve soil quality or level minor low spots generally only needs 2-3 inches spread as a thin layer. Going much deeper than needed for topdressing can actually smother existing grass, so match your Topsoil Depth entry to which situation you're actually in.

The raw geometric calculation assumes topsoil sits at a perfectly even, fully-settled depth across the whole area, but freshly delivered and spread topsoil is loosely packed and compacts down somewhat over the following weeks as it settles and gets walked on or rained on. Ordering a 10-15% buffer on top of the calculated cubic yardage accounts for that settling so you don't end up short after the material compresses to a lower final depth than what you spread.

This calculator estimates truck loads assuming a standard dump truck capacity of around 12 cubic yards per load, though actual truck sizes commonly range from about 10 to 14 cubic yards depending on the specific truck your supplier dispatches. For a large order, confirm your supplier's actual truck capacity and delivery minimums directly, since a smaller truck may need more trips than this estimate suggests, which can affect delivery scheduling and cost.