How to use it
- Enter length, width, and thickness.
- Click Calculate.
- Read cubic yards, bags, and cubic feet results.
What it does – The Ozinga Concrete Calculator turns the three dimensions you input (length ft, width ft, thickness in) into three practical measures: cubic yards, cubic feet, and the number of 80‑lb bags needed.
Why it matters – Knowing cubic yards tells you how much concrete the supplier will charge for; cubic feet helps you compare job sizes; bag count lets you order the right amount of mix without costly over‑order.
How to read the results – The tool first shows total cubic feet, then divides by 27 to give cubic yards, and finally divides cubic feet by 0.6 cf per bag to list bags. Round up the bag total to the next whole bag before ordering. No hidden fees, just clear numbers you can act on.
Pro tips
- Add a 5‑10% waste allowance to the bag total.
- Always round the bag count up to the next whole bag.
- Order bags in full pallets when possible to save on shipping.
- Convert thickness from inches to feet correctly before entering.
Real-life examples
- Homeowner planning a 12 ft × 10 ft patio 4 in thick.
- Contractor estimating concrete for a 30 ft × 20 ft driveway 6 in thick.
- Landscaper calculating volume for an 8 ft × 8 ft garden edging 3 in thick.
Case study
John needed a 12 × 10 ft patio 4 in thick. Using the calculator he saw 0.44 cubic yards, 12 cubic feet, and 20 bags. He ordered 20 bags, avoided a $150 over‑order, and the patio was poured on schedule.