How to use it
- Enter length in feet.
- Enter width in feet.
- Enter thickness in inches.
- Click Calculate to see cubic yards, bags, and cubic feet.
Concrete Yard Calc turns the dimensions of your slab into the exact amount of concrete you need. You type length, width, and thickness, and the tool instantly returns three values: total cubic yards (the standard ordering unit), the number of 80‑lb bags based on the constant 0.6 ft³ per bag, and the raw cubic‑foot volume. Knowing cubic yards helps you compare quotes from suppliers, while the bag count tells you how many packages to order. The cubic‑foot figure is useful for checking calculations or for projects that require precise volume. All results are shown with two decimal places, so you can round up safely. No guesswork, no hidden fees—just a clear, free estimate for your concrete project. You can also compare the yardage to the minimum delivery size of most mixers to avoid extra trips. If you’re working with a contractor, share the cubic‑yard figure to ensure accurate pricing.
Pro tips
- Add 5‑10% extra volume for waste and spillage.
- Round up bag count to the next whole bag.
- Order bags in multiples of 5 to simplify delivery.
- Double‑check thickness conversion from inches to feet before entering.
Real-life examples
- Homeowner pouring a 12 ft × 10 ft patio 4 in thick.
- Contractor estimating concrete for a 30 ft × 20 ft driveway 6 in thick.
- DIYer planning a 8 ft × 8 ft garden walkway 3 in thick.
Case study
Mike needed a 10 ft × 12 ft patio at 4 in depth. Using the calculator he saw he required 1.23 cubic yards, which translated to 56 bags. He ordered exactly that amount, avoided a costly over‑order, and his project stayed on budget.