USGS - science for a changing world

Kansas Water Science Center

Water-Supply Paper 2502

Contents -- continued

CONVERSION FACTORS, ABBREVIATIONS, AND VERTICAL DATUM
Multiply by To obtain
acre 4,047 square meter
acre-foot (acre-ft) 1,233 cubic meter
cubic foot per second (ft³/s) 0.02832 cubic meter per second
cubic foot per second per square mile [( ft³/s)/ mi²] 0.01093 cubic meter per second per square kilometer
foot (ft) 0.3048 meter
foot per hour (ft/hr) 0.3048 meter per hour
foot per second (ft/s 0.3048 meter per second
gallon (gal) 3.785 liter
inch (in) 25.4 millimeter
inch per day (in/d) 25.4 millimeter per day
inch per hour (in/hr) 25.4 millimeter per hour
inch per year (in/yr) 25.4 millimeter per year
mile (mi) 1.609 kilometer
mile per hour (mi/hr) 1.609 kilometer per hour
square foot (ft&ssup2;) 0.9290 square meter
square mile (mi²) 2.590 square kilometer
yard (yd) 0.9144 meter

Temperature can be converted to degrees Celsius (°C) or degrees Fahrenheit (°F) by the equations:

°C = 5/9 (°F - 32)
°F = 9/5 (°C) + 32.

Sea level: In this report, "sea level" refers to the National Geodetic Vertical Datum of 1929-a
geodetic datum derived from a general adjustment of the first-order level nets of the United
States and Canada, formerly called Sea Level Datum of 1929.


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