USGS Water Resources Information
National Water Summary on Wetland Resources
United States Geological Survey Water Supply Paper 2425

Supplemental Information-
Conversion Factors


The following list provides the necesary factors for converting U.S. Customary (inch-pound) units used in this National Water Summary to International System (metric) and other commonly used U.S. Customary units. Units, which are written in abbreviated form below, are spelled out in parentheses the first time that they appear. Most of the quantities listed are rounded to five significant figures. However, quantities shown in italics are exact equivalents - no rounding was necessary. To convert the unit in the left-hand column to that in the right, multiply by the number in the right-hand column, except for temperature. For temperature, use the equation provided.

The data in this list were adapted largely from information found in the following publications:

Chisholm, L.J., 1967, Units of weight and measure - International (Metric) and U.S. Customary:
U.S. National Bureau of Standards Miscellaneous Publication 286, 251 p.
U.S. Geological Survey, 1919, Hydraulic conversion tables and convenient equivalents (2d ed.):
U.S. Geological Survey Water-Supply Paper 425-C, p. C71-C94.
Conversion Factors

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