How to use it
- Enter length, width, and thickness in feet and inches.
- Input the current price per cubic yard of concrete.
- Click Calculate to see cubic yards, bag count, and estimated cost.
- Adjust any value to see instant updates.
Enter the patio length, width, and desired thickness, then input the current price per cubic yard of concrete. The calculator converts those dimensions to cubic yards, then multiplies by your price to give an estimated total cost. It also shows how many 80‑lb bags you’ll need, using the standard 0.6 ft³ per bag, and displays the volume in cubic feet for easy comparison with supplier quotes. Understanding each figure helps you budget accurately, avoid surprise over‑orders, and communicate clearly with contractors. The results appear instantly, so you can tweak dimensions or material costs and see the impact in real time. You can also add a 10 % waste allowance to the bag count for cuts and spillage. Compare the cubic‑foot figure with supplier delivery minimums to decide if a full‑truck load is needed. The tool works on any device, no download required.
Pro tips
- Add a 10 % waste allowance to the bag total to cover cuts and spillage.
- Round up the bag count; you can’t order a fraction of a bag.
- Check local suppliers for minimum delivery volumes in cubic feet.
- If your thickness changes, recalculate; volume grows linearly with depth.
Real-life examples
- Homeowner planning a backyard patio and wants a precise budget before ordering concrete.
- Landscape contractor preparing a bid for a client’s 12x12 patio and needs material quantities.
- DIY enthusiast comparing the cost of ready‑mix versus mixing on‑site for a small patio.
Case study
Sam entered 12 ft × 12 ft × 4 in and a $135 per cubic yard price. The calculator showed 1.33 yd³, $180 total, and 222 bags (rounded up). With the waste allowance added, he ordered 245 bags, avoiding a costly short‑run and kept his project on budget.