How to use it
- Enter length, width and thickness.
- Input the price per cubic yard.
- Click Calculate to see volume, cost, bags and cubic feet.
What it does – The Figure Concrete Cost Calculator turns your slab dimensions and material price into four actionable numbers: cubic yards, total cost, required 80‑lb bags, and cubic feet. Knowing the cubic yards lets you order the right amount of ready‑mix, while the bag count helps if you’re mixing on‑site. The cost estimate lets you compare suppliers before you commit. How to read the results – Cubic yards is the volume in standard ready‑mix units; multiply by your price per yard for the Estimated cost. Bags is the number of 80‑lb mixes (each 0.6 ft³) rounded up to the nearest whole bag. Cubic feet is the raw volume, useful for on‑site mix calculations. All results update instantly as you change inputs today.
Pro tips
- Add 5‑10% extra volume for waste and spillage.
- Round bag count up; you can’t purchase a fraction of a bag.
- Order ready‑mix by the cubic yard, not by weight, to avoid over‑ordering.
- Double‑check thickness conversion (inches to feet) before calculating.
Real-life examples
- A homeowner planning a 12 × 16 ft patio needs to know how many bags of mix to buy.
- A contractor estimating the concrete for a 24 × 30 ft warehouse slab wants a quick cost quote.
- A DIY enthusiast figuring out material for a 4‑in thick driveway wants the exact cubic yards to order.
Case study
Mike needed a 10 × 10 ft patio, 4 in thick. Using the calculator he saw the slab required 1.23 cubic yards, about 56 bags, and would cost $148. He ordered exactly that amount, avoided a $200 over‑order, and finished on schedule.