Conversion Factors and Datums


Conversion Factors


Multiply	By	To obtain
Length
centimeter (cm)	0.3937	inch (in.)
millimeter (mm)	0.03937	inch (in.)
meter (m)	3.281	foot (ft)
kilometer (km)	0.6214	mile (mi)
Area
square meter (m2)	0.0002471	acre
square kilometer (km2)	0.3861	square mile (mi2)
Volume
liter (L)	33.82	ounce, fluid (fl. oz)
liter (L)	1.057	quart (qt)
liter (L)	0.2642	gallon (gal)
cubic meter (m3)	264.2	gallon (gal)
cubic centimeter (cm3)	0.06102	cubic inch (in3)
liter (L)	61.02	cubic inch (in3)
cubic meter (m3)	35.31	cubic foot (ft3)
Flow rate
meter per second (m/s)	3.281	foot per second (ft/s)
cubic meter per second (m3/s)	35.31	cubic foot per second (ft3/s)
Mass
microgram (µg)	1,000	milligram (mg)
gram (g)	0.03527	ounce, avoirdupois (oz)
kilogram (kg)	2.205	pound avoirdupois (lb)
megagram (Mg)	1.102	ton, short (2,000 lb)
megagram (Mg)	0.9842	ton, long (2,240 lb)
Hydraulic gradient
meter per meter (m/m)	3.281	foot per foot (ft/ft)
meter per kilometer (m/km)	5.27983	foot per mile (ft/mi)

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


°F=(1.8×°C)+32.


Specific conductance is given in microsiemens per centimeter at 25 degrees Celsius (µS/cm at 25°C).


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


Algal biomass values are given in milligrams per square meter (mg/m²).


Algal cell density values are given in numbers per square centimeter (#/cm²).


Algal biovolume values are given in cubic micrometers per square centimeter (µ³/cm²).


Datums


Vertical coordinate information is referenced to the North American Vertical Datum of 1988 (NAVD 88).


Horizontal coordinate information is referenced to the North American Datum of 1983 (NAD 83).


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

First posted February 29, 2012