About Concrete Calculator Kit
Concrete Calculator Kit is a small collection of free calculators that help you order the right amount of material for a building or landscaping project. Whether you are pouring a concrete slab, surfacing a gravel driveway, bedding pavers in sand, filling a raised garden bed with topsoil, or mulching a border, the aim is the same: an accurate figure in cubic yards, cubic meters, tons or bags in seconds.
Free and private by design
Every tool here is completely free. There is no account to create, no email to hand over, and no limit on how many times you can use it. Just as important, every calculation happens on your own device. The measurements you enter are never uploaded to a server and we never see them. The maths runs in your browser and stays there.
Honest, stated assumptions
Materials vary. Gravel, sand and topsoil differ in density depending on the product and how wet it is, and bag yields differ slightly by brand. So each calculator states the density and bag size it uses right on the page, and includes a waste allowance you can adjust. Treat the results as reliable estimates for ordering, and check the specific figures your supplier quotes for the exact product you are buying.
Get in touch
Found a bug, want a different unit, or need a calculator we have not built yet? We would like to hear from you. Visit the contact page.