Landscape Material Calculators

Gravel, crushed stone, sand, topsoil, mulch, and compost are quarried or organic materials, so their density varies with moisture, gradation, and processing — each shows a sourced range instead of a single number, and explains why in its density note. Compost's figures come from university extension research rather than supplier estimates, the only calculator on this site sourced that way. Asphalt is different again: it's a manufactured product, and its density range reflects compaction state — compacted, in-place tonnage, not loose mix or millings — rather than moisture or gradation. Sod and paver patios are the exception to all of it: both are sold by area, not weight, so neither calculator has any density at all — each has its own sourced range covering piece, pallet, or paver coverage instead. Pick the material you're ordering to get the right numbers for your project.