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# Garage Floor Prep.

## Garage Floor Prep.

#1
07-22-07, 06:51 PM
Member
Join Date: Oct 2002
Location: Enfield, Ct.
Posts: 51
Garage Floor Prep.

What is the formula for ordering cement yardage. I have sq footage but don't know how to convert to yardage. Or will cement co's do that for you. Thickness of pad or floor by sq footage? Thanks.

#2
07-22-07, 07:19 PM
Banned. Rule And/Or Policy Violation
Join Date: Jul 2006
Location: USA
Posts: 7,754
Received 1 Upvote on 1 Post
First measure depth ie. 6"= 1/2 ft etc. then width and length. Make sure all measurements are the same units, feet are easiest. Then convert to yards.

Example is 6" deep by 10 feet wide by 20 feet long is figured by the following: 1/2 X 10 X 20 = 100 cubic feet divided by 27 for cubic yards = 3.7 cubic yards or just "yards". Usually rounding up to to the next yard for delivery.

#3
07-22-07, 07:21 PM
Member
Join Date: Mar 2006
Location: Austin, TX
Posts: 1,304
Square foot times depth converted to cubic yards:

length(in feet) X width(in feet) X depth(in feet)/27 = cubic yards. Add waste at around 5% if your grades are good, 10% if they are only so/so and up to 15% for sloppy grading and form work.

A concrete company that would calculate your requirements is stupid.