This works out how much gravel, mulch or topsoil an area needs, in cubic yards, plus an estimated weight — because “how much does a cubic yard weigh” genuinely depends on which material you mean.
How it works
Volume and weight
volume = area × depth · weight = volume × density
Converted to cubic yards, the unit these materials are conventionally sold and delivered by in the US.
Why density has to be entered, not assumed
Gravel, mulch and topsoil are wildly different densities. Mulch is mostly air and organic matter — roughly 400–800 lb per cubic yard loose. Gravel is compacted stone — roughly 2,600–2,900 lb per cubic yard, three to seven times heavier for the identical volume. This calculator asks for the material’s density directly rather than assuming “landscaping material” is one substance; the default reflects gravel and must be changed for anything else.
How to use this calculator
- Enter the area to cover and the depth of material.
- Set the density to match your material — check with your supplier for their specific product’s figure.
- Read the volume in cubic yards and the estimated weight.
Frequently asked questions
Why is the weight only an estimate?
Because density varies by moisture content, compaction and the specific material — a supplier’s own stated density for their product is more accurate than any general figure, which is why this field is fully editable.
What depth should I use for mulch versus gravel?
This varies by purpose — a typical mulch depth for weed suppression is often 2–4 inches, while a gravel driveway base might be considerably deeper. Check guidance specific to your project rather than assuming one depth fits every material and purpose.
Does this account for compaction after delivery?
No — this calculates loose volume as delivered. Gravel in particular compacts under its own weight and under traffic over time, which isn’t modelled here.
Why does weight matter for a delivery, not just volume?
Because delivery vehicles have weight limits as well as volume limits — for a dense material like gravel, weight is often the binding constraint on how much a single truck can bring, more than the volume itself.
Can I use this for sand as well?
Yes — enter sand’s own density (commonly cited around 2,500–2,700 lb per cubic yard, though it varies by moisture and type), since the volume-and-weight formula works identically for any bulk material.
