How to use it
- Enter the cylinder diameter in inches.
- Enter the height or depth in feet.
- Specify how many cylinders you need.
- Read the cubic yards, bags and cubic feet results.
This tool converts the dimensions of one or many concrete cylinders into three practical measures: cubic feet, cubic yards, and the number of standard 80‑lb bags. Knowing the cubic‑yard total helps you order the right truck size, while the bag count tells you how many mix bags to purchase. The calculator first finds the volume of a single cylinder, multiplies it by the quantity you entered, then translates that total into cubic yards (1 yd³ = 27 ft³) and divides by 0.6 ft³ per 80‑lb bag. The results are displayed instantly, so you can compare options, budget material, and avoid costly over‑orders or shortages.
Pro tips
- Add 5‑10% extra for waste and spillage.
- Round bag count up to the next whole bag—partial bags aren’t sold.
- If ordering by the truck, use the cubic‑yard figure to get accurate delivery quotes.
- Double‑check that diameter is entered in inches and height in feet to keep units consistent.
Real-life examples
- A homeowner estimating concrete for 12‑in‑diameter footings for a new deck.
- A contractor sizing concrete for multiple 24‑in‑diameter columns on a commercial build.
- A landscaper planning decorative concrete cylinders for a garden path.
Case study
Mike needed 15 ft³ of concrete for ten 12‑in‑diameter, 2‑ft‑high cylinders. The calculator showed 0.58 yd³ and 27 bags, letting him order exactly the right amount and finish the project on budget.