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2.Table of Conversion Factors for Metric and U.S.
This water quantity equivalents and conversion factor lists is for those
interested in converting units. The right-hand column includes units
expressed in two systems - US Customary and International System (metric).
Units, which are written in abbreviated form below, are spelled out in
parentheses the first time they appear. To convert from the unit in the
left-hand column to that in the right, multiply by the number in the
right-hand column. Most of the quantities listed were rounded to five
significant figures. However, for many purposes, the first two or three
significant figures are adequate for determining many water-quantity
relations, such as general comparisons of water availability with water
use or calculations in which the accuracy of the original data itself does
not justify more than three significant figures. Quantities shown in
italics are exact equivalents - no rounding was necessary. Regarding
length of time, each calendar year is assumed (for this list) to consist
of 365 days.