How to use it
- Enter length in feet.
- Enter width in feet.
- Enter thickness in inches.
- Read the cubic yards, cubic feet, and bags needed.
Concrete Yardage Calculator lets you turn the dimensions of your slab into the exact amount of concrete you need—cubic yards, cubic feet, and the number of 80‑lb bags. Knowing the volume helps you avoid costly over‑orders and prevents shortfalls that delay projects. Enter length, width, and thickness; the tool instantly converts feet and inches to cubic yards (1 yd³ = 27 ft³) and then divides the cubic‑feet total by 0.6 ft³ per bag to show how many bags to buy. The results are rounded up, because you can’t purchase a fraction of a bag. Use the numbers to get accurate quotes from suppliers, plan delivery dates, and keep your budget on track. The calculator also shows the total cubic‑feet, useful when your contractor asks for that unit. It works for driveways, patios, sidewalks, and foundation footings, giving you confidence before you order.
Pro tips
- Add 5‑10% extra for waste and spillage.
- Round up to the next whole bag; you can’t buy partial bags.
- Order a few extra bags to cover unexpected depth changes.
- Double‑check thickness conversion from inches to feet before entering.
Real-life examples
- A homeowner planning a 12 ft × 10 ft patio at 4 in thickness needs to know how many bags to buy.
- A contractor estimating material for a 30 ft driveway wants the total cubic yards for a quote.
- A DIY enthusiast building a concrete footings wants the exact bag count to avoid multiple trips.
Case study
Mike entered his 20 ft × 15 ft slab at 6 in thickness and instantly saw 2.0 cubic yards, 54 cubic feet, and 90 bags. He ordered 92 bags, covered waste, and completed his patio on schedule without extra trips.