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 Cement Sand Mix Calculator turns the dimensions of your slab, patio, or footing into three practical numbers: total cubic yards of concrete, the number of 80‑lb bags you’ll need, and the raw cubic feet volume. Knowing the cubic yards helps you compare quotes from suppliers, while the bag count tells you exactly how many bags to order, avoiding costly over‑ or under‑purchasing. The cubic‑feet figure is useful for estimating material waste and for coordinating with contractors who work in that unit. Simply type length, width, and thickness, and the tool instantly performs the conversion using the standard 0.6 ft³ per 80‑lb bag. The results appear in clear columns, so you can copy the numbers into your project plan or budget without extra math.
Pro tips
- Add 5‑10% extra for waste.
- Round up bag count to the next whole bag.
- Order bags in multiples of 10 for bulk discounts.
- 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 slab 6 in thick.
- A DIYer calculating mix for a 6 ft × 8 ft garden walkway 3 in thick.
Case study
Mike needed a 10 ft × 15 ft slab 5 in thick for his garage floor. Using the calculator he saw the project required 1.84 cubic yards, which translated to 101 bags of 80‑lb mix. He ordered 102 bags, avoided a second delivery, and finished on budget.