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)
To raise Lake Michigan by 1 inch, approximately 1.5 billion gallons of water are needed. This estimate is based on the lake's surface area, which is about 22,300 square miles. When considering the volume of water required to cover this area by one inch, the calculation results in the need for about 1.5 billion gallons.
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.
Volume of the pipe = 4.896 gallons
111 gallons of water.
14.7 gallons of water.
16 and 7/8
1.15 gallons of water.
437