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 Sakrete Concrete Mix Calculator turns your slab dimensions (length, width, thickness) into three useful numbers: cubic yards of concrete, the number of 80‑lb bags required, and total cubic feet. Why it matters – Ordering the right amount saves money and prevents delays; too little means a weak pour, too much adds unnecessary cost and waste. How to read the results – Cubic yards is the volume contractors use for delivery quotes. Bags tells you how many 80‑lb sacks to purchase; always round up to the next whole bag. Cubic feet is a quick check against your own measurements. No hidden formulas—just the standard 0.6 ft³ per bag and the 27 ft³ per yard conversion. You can also compare the bag count with supplier minimum orders to avoid extra trips. The calculator updates instantly as you change any dimension, so you can experiment with thickness before you commit.
Pro tips
- Add 10% extra for spillage and uneven subgrade.
- Round bag count up; you can’t buy a fraction of a bag.
- Order bags in multiples that match supplier delivery minimums.
- Double‑check thickness; a common mistake is entering inches as feet.
Real-life examples
- Homeowner pouring a 12‑ft patio slab 4 in thick.
- Contractor estimating concrete for a 24‑ft driveway 6 in thick.
- DIY hobbyist building a garden stepping stone base 3 in thick.
Case study
Mike needed a 10 × 10 ft patio 4 in thick. Using the calculator he saw he required 1.24 cubic yards, which translates to 56 bags of Sakrete mix. He ordered 56 bags, avoided a second delivery, and completed the pour on schedule, saving $120 on material waste.