According to Darryl Enriquez of the Milwaukee Journal Sentinal, 1 inch of water depth in Lake Michigan accounts for 390 BILLION gallons of water.
He also reports that "The loss of an inch of water in the other lakes translates in billion of gallons as follows: Lake Superior, 550; Lake Huron, 400; Lake Erie, 170; and Lake Ontario, 130"
(Information from http://blogs.jsonline.com/waukesha/archive/2006/11.aspx)
1 cubic inch is 0.004329 US gallons.
30.55 gallons (rounded) for every inch the water in the tub is deep.
About 208.292013 gallons of water.
There need not be any water in the pipe.Assuming that it is a 10 inch diameter pipe, then its capacity is 4.08 US gallons.
100 feet of 3-inch pipe holds 36.73 gallons of water.
14.7 gallons of water.
111 gallons of water.
Volume of the pipe = 4.896 gallons
16 and 7/8
1.15 gallons of water.
437
100 feet by 100 feet by one inch equates to 6,233.76 gallons of water.