# 1 inch of rain =_______gal. of water per 1000 sf.?

Discussion in 'Lawn Mowing' started by ant, Dec 16, 2001.

1. ### antLawnSite Silver Memberfrom dirty jerseyPosts: 2,447

1 inch of rain over 1000 sf= 620 gal of water. is that right?
anthony

2. ### lawrence stoneBannedfrom anthracite valley, commonwealth of pennsylvania WiPosts: 2,079

In an Ed McMahon voice I say:

"You are Correct Sir!!"

3. ### antLawnSite Silver Memberfrom dirty jerseyPosts: 2,447

are they making snow up your way yet?
ant

4. ### Albemarle LawnLawnSite Bronze Memberfrom VIRGINIAPosts: 1,544

So the cubic feet are:

1"=(1/12) of 1 foot.

[(1/12)ft]X1000=83.33 cubic feet of water.

And the gallons are:

(83.33 cu ft)X(7.48gal/cu ft)=623.33.

Rounded off = 620 gallons.

Ken

5. ### GrassChopperLawnSite Memberfrom Cocoa, FloridaPosts: 131

Numbers are right, I just don't understand your first equation.

Quote "[(1/12)ft]x1000=83.33 cubic feet of water "

If 1 cubic foot of water =7.48 gallons, then shouldn't it be

7.48/12=.623 gallons of water per cubic foot @ 1 inch

.623 X 1000= 623 gallons of water for 1000 sf

Same answer, I just don't know how you got yours.

6. ### RunnerLawnSite Fanaticfrom Flint, MichiganPosts: 13,494

I always taking a whole different route, which was the long way home! I was going to figure 1" @ 1000 sq. ft. = 3.09 cubic yds. Then do the division of cubic yds, apply it to the cu.ft./gal., and go from there. See, I TOLD you I was taking the long way home!

7. ### Albemarle LawnLawnSite Bronze Memberfrom VIRGINIAPosts: 1,544

I used that to determine the number of cubic feet. You know the square feet, 1000. You need the height to complete the "cube" and the height is 1", or 1/12 ft, or .083 ft. Three ways to express the same amount.

Your numbers are also correct. I just used the pure mathematical approach with the only known constant being gallons/cu ft, which is 7.48.

Ken