How to use it
- Enter length in feet.
- Enter width in feet.
- Enter thickness in inches.
- Read cubic yards, bags, and cubic feet results.
What it does – The Crush Concrete Calculator turns your slab dimensions (length, width, thickness) into three practical numbers: cubic yards of concrete, the number of 80‑lb bags you’ll need, and total cubic feet. Knowing cubic yards helps you order the right amount of ready‑mix, while bag count is essential for DIY mixes. The cubic‑feet figure lets you compare against material specs or waste allowances. The tool does the math instantly, so you avoid costly over‑ordering or shortfalls. Read the results: cubic yards is the volume in 27‑ft³ units, bags is the volume divided by 0.6 ft³ per bag, and cubic feet is the raw volume. Use these numbers to place accurate orders, budget material costs, and keep your project on schedule.
Pro tips
- Add a 10% waste allowance to the total volume.
- Round up the bag count to the next whole bag.
- Order a little more than calculated to account for settling.
- Double‑check thickness conversion from inches to feet.
Real-life examples
- A homeowner pouring a 12 ft × 12 ft patio 4 in thick.
- A contractor estimating concrete for a 30 ft × 50 ft warehouse floor 6 in thick.
- A DIY enthusiast planning a 8 ft × 10 ft garden walkway 3 in thick.
Case study
John needed a 10 ft × 10 ft slab 4 in thick for his workshop. Using the calculator, he saw the project required 1.24 cubic yards, about 56 bags, and 33.3 cubic feet, so he ordered exactly that amount and avoided a $200 overrun.