Contact

The fastest way to reach us is email: hello@bulkmaterialcalculator.com. We read every message and usually reply within two business days.

Report a wrong number

If a result looks off, send us the calculator (or its URL), the exact inputs you entered (shape, dimensions, units, depth and material) and the number you expected instead. We check it against the sources listed on how we calculate and correct the figure if the density or yield we are using is out of date.

Request a material or a feature

Don't see the material you need? Tell us what it is and roughly how it is sold (by the yard, the ton, or the bag) and we'll look at adding it. The same goes for calculator features: a unit, a shape, or an output you wish the tool showed.

Bug reports

Please include the browser and device you were using, the page URL, and what you expected to happen instead. A screenshot helps if the layout looks broken rather than a number being wrong.

What we can't help with

We are not a materials supplier, a contractor, or a delivery service ourselves, and can't quote or arrange a delivery directly. Take the figures this calculator gives you when you call a yard or supplier yourself.