How to use it
- Enter the length in feet.
- Enter the width in feet.
- Enter the thickness in inches.
- Read the cubic feet, cubic yards, and bag count results.
Use the Concrete Countertop Calculator to turn your countertop dimensions into the exact amount of concrete you’ll need. Enter length, width and thickness, and the tool instantly gives you the volume in cubic feet and cubic yards, plus how many 80‑lb bags to order. Knowing the cubic yard figure helps you compare quotes from suppliers, while the bag count prevents costly over‑ordering. The results are presented in three columns: Cubic Feet (raw volume), Cubic Yards (volume divided by 27), and Bags (cubic feet divided by 0.6). Read the numbers, add a small waste factor, and you’ll have a reliable order list before you call the mixer. No guesswork, no extra calculations—just the data you need to start your project with confidence.
Pro tips
- Add 5‑10% extra for waste and spillage
- Round up bag count to the next whole bag
- Order bags in multiples that match supplier minimums
- Double‑check thickness conversion from inches to feet
Real-life examples
- A homeowner planning a 6 ft × 3 ft kitchen island countertop
- A contractor estimating concrete for a commercial reception bar
- A DIY hobbyist building a concrete coffee table top
Case study
Sam needed a 4 ft × 8 ft countertop 1.5 in thick. The calculator showed 1.78 cubic yards → 8 bags. He ordered 8 bags, added 5% waste, and the mix arrived exactly enough, avoiding a costly second delivery.