Question 1

How many 80lb bags of concrete do I need?

Accepted Answer

One 80lb bag of concrete yields about 0.6 cubic feet (roughly 0.022 cubic yards). To find the number of bags, multiply your total volume in cubic yards by 45.

Question 2

How much volume does a 60lb bag of concrete make?

Accepted Answer

A 60lb bag of concrete yields approximately 0.45 cubic feet (about 0.017 cubic yards) of mixed concrete — multiply your volume in cubic yards by 60 to get the number of 60lb bags needed.

Question 3

When should I use bags vs ready-mix concrete?

Accepted Answer

For pours under 1 cubic yard, pre-mix bags are usually more practical. For larger pours, ready-mix delivery is more cost-effective and saves significant labor.

Question 4

How do I calculate concrete volume in cubic yards?

Accepted Answer

Multiply length × width × depth (all in feet), then divide by 27 to convert cubic feet to cubic yards.

Concrete bag calculator