Guides

How to Convert Cubic Feet to Cubic Yards

Divide cubic feet by 27 to get cubic yards. Here's why, with a conversion table for common volumes.

What Is a Cubic Yard?

A cubic yard is a volume 3 feet wide, 3 feet long and 3 feet tall — 27 cubic feet. Here's how to picture it.

How Many 80 lb Bags of Concrete Are in a Yard?

You need 45 × 80 lb bags to make one cubic yard of concrete. Here's the math and the counts for 60 and 40 lb bags too.

How Much Does a Bag of Concrete Weigh?

Concrete comes in 40, 50, 60 and 80 lb bags. The number on the bag is its dry weight before you add water.

How Thick Should a Concrete Slab Be?

4 inches is standard for patios and walkways; driveways need 5–6 inches. A thickness chart by application.

How Much Does Concrete Cost Per Yard?

Ready-mix concrete runs about $125–$165 per cubic yard delivered, before short-load and other fees.

How Much Concrete Do You Need Per Fence Post?

Plan for 1–2 bags of 50 lb fast-setting concrete per fence post, depending on hole size.

How Many Square Feet Does a Yard of Concrete Cover?

One cubic yard covers 81 ft² at 4 inches thick. Coverage depends entirely on slab thickness.

How Many Yards Are in a Ton of Gravel?

A ton of gravel is about 0.71 cubic yards, since gravel weighs roughly 1.4 tons per cubic yard.