Planning a driveway, patio, or post? Accurately estimate the volume and bags of premix needed for your project.
Volume Needed
Cubic Yards
(0.0 Cubic Feet)
80lb Bags
0
60lb Bags
0
Bag estimates are approximate. Always buy 10% extra for waste.
Concrete is typically measured in Cubic Yards. One cubic yard is 27 cubic feet.
Always order or buy 5-10% more than the exact calculation to account for spillage, uneven ground, or calculation errors. It's much better to have a little left over than to run out mid-pour!
Not all concrete is the same. The strength is measured in PSI (Pounds per Square Inch).
Many beginners mistake drying for curing. Concrete doesn't harden by drying out; it hardens by a chemical reaction with water called hydration.
If concrete dries too fast (on a hot, windy day), the reaction stops, and the concrete becomes weak and powdery. To "cure" concrete properly, keep it moist for at least 3-7 days by misting it with water or covering it with plastic.
You need approximately forty-five (45) 80lb bags to make 1 cubic yard of concrete. If using 60lb bags, you need about 60 bags.