How to use it
- Enter length in feet.
- Enter width in feet.
- Enter thickness in inches.
- Read the cubic yards, bags, and cubic feet results.
What it does – The Sakrete Calculator takes the length, width, and thickness you enter and instantly tells you the volume in cubic feet, converts that to cubic yards, and estimates how many 80‑lb bags you’ll need (each bag ≈ 0.6 ft³).
Why it matters – Knowing the exact volume prevents over‑ordering, which saves money, and avoids under‑ordering, which can delay a project.
How to read the results – Cubic feet is the raw volume of your slab. Divide by 27 to get cubic yards, the standard unit for delivery quotes. Divide cubic feet by 0.6 to see the bag count. Round up to the nearest whole bag before you place an order.
You can also use the cubic‑yard figure to compare prices from different suppliers, ensuring you get the best rate per yard. The calculator works for any shape as long as you break the area into rectangles and sum the volumes.
Pro tips
- Add 10% extra for waste.
- Round bag count up to the next whole bag.
- Order one extra bag to cover minor errors.
- Double‑check thickness conversion from inches to feet.
Real-life examples
- Homeowner pouring a 12‑ft patio.
- Contractor estimating material for a 24‑ft driveway.
- DIYer building a 6‑ft garden walkway.
Case study
Mike needed a 10‑ft by 8‑ft slab 4 in thick. Using the calculator he saw he required 1.18 cubic yards, 63 bags. He ordered 65 bags, saved a trip, and finished on schedule.