Figuring out how much concrete to buy usually means two separate calculations: cubic yards for a ready-mix order, and bag counts if you’re mixing it yourself at the hardware store. Our concrete calculator does both at once.
- Instant — enter length, width, and thickness and every number updates as you type, with no page reload.
- Both units at once — cubic yards for a ready-mix truck order, plus 60 lb and 80 lb bag counts if you’re doing it yourself.
- Honest about bag yield — bag counts use the manufacturer’s typical published yield (0.45 ft³ for a 60 lb bag, 0.6 ft³ for an 80 lb bag), and we say so plainly rather than pretending it’s an exact figure.
- Shareable — your dimensions live in the link, so you can send a pre-filled result to whoever’s picking up the order.
Try it with your own slab, footing, or post-hole dimensions, and if you write about home projects, the calculator is embeddable on your own site with one iframe.