Conversion Factors and Datums


Conversion Factors


Multiply	By	To obtain
centimeter (cm)	0.3937	inch (in.)
millimeter (mm)	0.03937	inch (in.)
meter (m)	3.281	foot (ft)
kilometer (km)	0.6214	mile (mi)
square meter (m2)	0.0002471	acre
square meter (m2)	10.76	square foot (ft2)
square kilometer (km2)	0.3861	square mile (mi2)
meter per second (m/s)	3.281	foot per second (ft/s)
centimeter per second (cm/s)	0.328	foot per second (ft/s)
milligram per liter (mg/L)	1.0	part per million (ppm)
micrometer (µm)	3.937×10-5	inch (in)
cubic micrometer (µm3)	61.023	cubic inch (in3)

Temperature in degrees Celsius (°C) may be converted to degrees Fahrenheit (°F) as follows:


°F=(1.8×°C)+32.


Concentrations of chemical constituents in water are given either in milligrams per liter (mg/L) or micrograms per liter (µg/L).


Datums


Vertical coordinate information is referenced to the Upper Klamath Lake Vertical Datum (UKLVD), which is used by the Bureau of Reclamation for reporting the elevation of Upper Klamath Lake. 


Horizontal coordinate information is referenced to the North American Datum of 1927 (NAD 27). 


Elevation, as in this report, refers to distance above the vertical datum. 


First posted March 16, 2011