How to use it
- Enter length, width, and thickness in the fields provided.
- Enter the price per cubic yard of concrete mix.
- Click the Calculate button to see all results.
Your concrete floor estimate is only a few clicks away. The calculator takes the length, width and thickness you provide, converts the dimensions to cubic yards, then multiplies by the price you enter to show the total material cost. It also tells you how many 80‑lb bags you’ll need, using the industry standard that one bag fills about 0.6 cubic feet, and it repeats the volume in cubic feet for easy comparison with other projects. Knowing the exact cubic yards helps you order the right amount of mix and avoid costly over‑orders, while the bag count lets you plan delivery and labor. For example, a 10 ft × 10 ft slab 4 in thick equals 1.23 cubic yards, roughly $148 at $120 per yard, and requires about 56 bags. Read each result line to see the volume, cost and material count before you place an order.
Pro tips
- Add 5‑10% extra volume for waste and spillage.
- Round the bag count up to the next whole bag.
- Order a little extra to cover compaction and settling.
- Convert thickness from inches to feet before entering it.
Real-life examples
- Homeowner planning a 12 ft × 20 ft garage floor.
- Contractor estimating material for a 4‑in thick warehouse slab.
- DIY renovator budgeting for a backyard patio.
Case study
Mike needed a 12 × 15 ft garage floor 3 in thick. Using the calculator, he saw the job required 0.74 cubic yards, about $89 at his supplier’s $120/yd price, and 41 bags. He ordered the exact amount, avoided a $150 over‑order, and completed the project on budget.
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