About Don't Run Short

Almost everyone who's poured a slab or spread a load of gravel has the same story: the material ran out with ten feet to go. Then came a second trip, a second delivery fee, or a cold joint in the concrete.

Don't Run Short is a set of material calculators built to prevent that. They do more than convert units. They answer the questions you actually have on the way to the supplier:

• How much do I need, including a sensible extra?
• Is it cheaper in bags, in bulk, or by the truck?
• Will it fit in my truck, and how many trips will it take?

Every formula and default number is published on our How we calculate page, and every price shows when it was last checked.

Questions or corrections? Get in touch.