Concrete calculators

Enter your dimensions, get cubic yards with a 10% waste factor — then price the delivery.

Shed & Workshop Slabs calculator Fence & Mailbox Posts calculator Driveway Aprons & Extensions calculator Footings & Deck Piers calculator Patios & Walkways calculator Equipment & AC Pads calculator

Conversion references

The two lookups behind every estimate — bags per yard and coverage per yard:

How many bags make a yard? 45 × 80 lb bags = 1 yd³ — full table by bag size How much does a yard cover? 81 sq ft at 4 in thick — coverage by thickness