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publications > open file report > OFR 2007-1034 > conversion factors
Initial Everglades Depth Estimation Network (EDEN) digital elevation model research and development
Conversion Factors
Inch/Pound to SI
| Multiply |
By |
To obtain |
| Length |
| inch (in.)
|
2.54 |
centimeter (cm)
|
| inch (in.)
|
25.4 |
millimeter (mm)
|
| foot (ft)
|
0.3048 |
meter (m)
|
| mile (mi)
|
1.609 |
kilometer (km)
|
| mile, nautical (nmi)
|
1.852 |
kilometer (km)
|
| yard (yd)
|
0.9144 |
meter (m)
|
| Area |
| acre |
4,047 |
square meter (m2)
|
| acre |
0.4047 |
hectare (ha)
|
| acre |
0.4047 |
square hectometer (hm2)
|
| acre |
0.004047 |
square kilometer (km2)
|
| square foot (ft2)
|
929.0 |
square centimeter (cm2)
|
| square foot (ft2)
|
0.09290 |
square meter (m2)
|
| square inch (in2)
|
6.452 |
square centimeter (cm2)
|
| section (640 acres or 1 square mile) |
259.0 |
square hectometer (hm2)
|
| square mile (mi2)
|
259.0 |
hectare (ha)
|
| square mile (mi2)
|
2.590 |
square kilometer (km2)
|
| Volume |
barrel (bbl), (petroleum,
1 barrel=42 gal) |
0.1590 |
cubic meter (m3)
|
| ounce, fluid (fl. oz)
|
0.02957 |
liter (L)
|
| pint (pt)
|
0.4732 |
liter (L)
|
| quart (qt)
|
0.9464 |
liter (L)
|
| gallon (gal)
|
3.785 |
liter (L)
|
| gallon (gal)
|
0.003785 |
cubic meter (m3)
|
| gallon (gal)
|
3.785 |
cubic decimeter (dm3)
|
| million gallons (Mgal)
|
3,785 |
cubic meter (m3)
|
| cubic inch (in3)
|
16.39 |
cubic centimeter (cm3)
|
| cubic inch (in3)
|
0.01639 |
cubic decimeter (dm3)
|
| cubic inch (in3)
|
0.01639 |
liter (L)
|
| cubic foot (ft3)
|
28.32 |
cubic decimeter (dm3)
|
| cubic foot (ft3)
|
0.02832 |
cubic meter (m3)
|
| cubic yard (yd3)
|
0.7646 |
cubic meter (m3)
|
| cubic mile (mi3)
|
4.168 |
cubic kilometer (km3)
|
| acre-foot (acre-ft)
|
1,233 |
cubic meter (m3)
|
| acre-foot (acre-ft)
|
0.001233 |
cubic hectometer (hm3)
|
| Flow rate |
| acre-foot per day (acre-ft/d)
|
0.01427 |
cubic meter per second (m3/s)
|
| acre-foot per year (acre-ft/yr)
|
1,233 |
cubic meter per year (m3/yr)
|
| acre-foot per year (acre-ft/yr)
|
0.001233 |
cubic hectometer per year (hm3/yr)
|
| foot per second (ft/s)
|
0.3048 |
meter per second (m/s)
|
| foot per minute (ft/min)
|
0.3048 |
meter per minute (m/min)
|
| foot per hour (ft/hr)
|
0.3048 |
meter per hour (m/hr)
|
| foot per day (ft/d)
|
0.3048 |
meter per day (m/d)
|
| foot per year (ft/yr) |
0.3048 |
meter per year (m/yr)
|
| cubic foot per second (ft3/s)
|
0.02832 |
cubic meter per second (m3/s)
|
cubic foot per second per square mile
[(ft3/s)/mi2]
|
0.01093 |
cubic meter per second per square kilometer
[(m3/s)/km2]
|
| cubic foot per day (ft3/d)
|
0.02832 |
cubic meter per day (m3/d)
|
| gallon per minute (gal/min)
|
0.06309 |
liter per second (L/s)
|
| gallon per day (gal/d)
|
0.003785 |
cubic meter per day (m3/d)
|
gallon per day per square mile
[(gal/d)/mi2]
|
0.001461 |
cubic meter per day per square kilometer
[(m3/d)/km2]
|
| million gallons per day (Mgal/d)
|
0.04381 |
cubic meter per second (m3/s)
|
million gallons per day per square mile
[(Mgal/d)/mi2]
|
1,461 |
cubic meter per day per square kilometer
[(m3/d)/km2]
|
| inch per hour (in/h)
|
0.0254 |
meter per hour (m/h)
|
| inch per year (in/yr)
|
25.4 |
millimeter per year (mm/yr)
|
| mile per hour (mi/h)
|
1.609 |
kilometer per hour (km/h)
|
| Mass |
| ounce, avoirdupois (oz)
|
28.35 |
gram (g)
|
| pound, avoirdupois (lb)
|
0.4536 |
kilogram (kg)
|
| ton, short (2,000 lb) |
0.9072 |
megagram (Mg)
|
| ton, long (2,240 lb) |
1.016 |
megagram (Mg)
|
| ton per day (ton/d)
|
0.9072 |
metric ton per day |
| ton per day (ton/d)
|
0.9072 |
megagram per day (Mg/d)
|
ton per day per square mile
[(ton/d)/mi2]
|
0.3503 |
megagram per day per square kilometer
[(Mg/d)/km2]
|
| ton per year (ton/yr)
|
0.9072 |
megagram per year (Mg/yr)
|
| ton per year (ton/yr)
|
0.9072 |
metric ton per year |
| Pressure |
| atmosphere, standard (atm)
|
101.3 |
kilopascal (kPa)
|
| bar |
100 |
kilopascal (kPa)
|
| inch of mercury at 60ºF (in Hg) |
3.377 |
kilopascal (kPa)
|
pound-force per square inch
(lbf/in2)
|
6.895 |
kilopascal (kPa)
|
| pound per square foot (lb/ft2)
|
0.04788 |
kilopascal (kPa)
|
| pound per square inch (lb/in2) |
6.895 |
kilopascal (kPa)
|
| Density |
| pound per cubic foot (lb/ft3)
|
16.02 |
kilogram per cubic meter (kg/m3)
|
| pound per cubic foot (lb/ft3)
|
0.01602 |
gram per cubic centimeter (g/cm3)
|
| Energy |
| kilowatthour (kWh)
|
3,600,000 |
joule (J)
|
| Radioactivity |
| picocurie per liter (pCi/L)
|
0.037 |
becquerel per liter (Bq/L)
|
| Specific capacity |
gallon per minute per foot
[(gal/min)/ft)]
|
0.2070 |
liter per second per meter
[(L/s)/m]
|
| Hydraulic conductivity |
| foot per day (ft/d)
|
0.3048 |
meter per day (m/d)
|
| Hydraulic gradient |
| foot per mile (ft/mi)
|
0.1894 |
meter per kilometer (m/km)
|
| Transmissivity* |
| foot squared per day (ft2/d)
|
0.09290 |
meter squared per day (m2/d)
|
| Application rate |
pounds per acre per year
[(lb/acre)/yr]
|
1.121 |
kilograms per hectare per year
[(kg/ha)/yr]
|
| Leakance |
foot per day per foot
[(ft/d)/ft]
|
1 |
meter per day per meter |
inch per year per foot
[(in/yr)/ft]
|
83.33 |
millimeter per year per meter
[(mm/yr)/m]
|
Temperature in
degrees Celsius (°C) may be converted to degrees Fahrenheit (°F) as follows:
°F=(1.8x°C)+32
Temperature in
degrees Fahrenheit (°F) may be converted to degrees Celsius (°C) as follows:
°C=(°F-32)/1.8
Vertical
coordinate information is referenced to the insert datum name (and
abbreviation) here for instance, "North American Vertical Datum of 1988 (NAVD 88)."
Horizontal
coordinate information is referenced to the insert datum name (and
abbreviation) here for instance, "North American Datum of 1983 (NAD 83)."
Altitude, as
used in this report, refers to distance above the vertical datum.
*Transmissivity:
The standard unit for transmissivity is cubic foot per day per square foot times foot of aquifer thickness [(ft3/d)/ft2]ft. In this report, the mathematically reduced form,
foot squared per day (ft2/d), is used for convenience.
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).
NOTE TO USGS USERS:
Use of hectare (ha) as an alternative name for square hectometer (hm2) is restricted to the measurement of small land or
water areas. Use of liter (L) as a special name for cubic decimeter (dm3) is restricted to the measurement of liquids and
gases. No prefix other than milli should be used with liter. Metric ton (t) as
a name for megagram (Mg) should be restricted to commercial usage, and no
prefixes should be used with it.
SI to Inch/Pound
| 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)
|
| kilometer (km)
|
0.5400 |
mile, nautical (nmi)
|
| meter (m)
|
1.094 |
yard (yd)
|
| Area |
| square meter (m2)
|
0.0002471 |
acre |
| hectare (ha)
|
2.471 |
acre |
| square hectometer (hm2)
|
2.471 |
acre |
| square kilometer (km2)
|
247.1 |
acre |
| square centimeter (cm2)
|
0.001076 |
square foot (ft2)
|
| square meter (m2)
|
10.76 |
square foot (ft2)
|
| square centimeter (cm2)
|
0.1550 |
square inch (ft2)
|
| square hectometer (hm2)
|
0.003861 |
section (640 acres or 1 square mile) |
| hectare (ha)
|
0.003861 |
square mile (mi2)
|
| square kilometer (km2)
|
0.3861 |
square mile (mi2)
|
| Volume |
| cubic meter (m3)
|
6.290 |
barrel (petroleum, 1 barrel = 42 gal) |
| liter (L)
|
33.82 |
ounce, fluid (fl. oz)
|
| liter (L)
|
2.113 |
pint (pt)
|
| liter (L)
|
1.057 |
quart (qt)
|
| liter (L)
|
0.2642 |
gallon (gal)
|
| cubic meter (m3)
|
264.2 |
gallon (gal)
|
| cubic decimeter (dm3)
|
0.2642 |
gallon (gal)
|
| cubic meter (m3)
|
0.0002642 |
million gallons (Mgal)
|
| cubic centimeter (cm3)
|
0.06102 |
cubic inch (in3)
|
| cubic decimeter (dm3)
|
61.02 |
cubic inch (in3)
|
| liter (L)
|
61.02 |
cubic inch (in3)
|
| cubic decimeter (dm3)
|
0.03531 |
cubic foot (ft3)
|
| cubic meter (m3)
|
35.31 |
cubic foot (ft3)
|
| cubic meter (m3)
|
1.308 |
cubic yard (yd3)
|
| cubic kilometer (km3)
|
0.2399 |
cubic mile (mi3)
|
| cubic meter (m3)
|
0.0008107 |
acre-foot (acre-ft)
|
| cubic hectometer (hm3)
|
810.7 |
acre-foot (acre-ft)
|
| Flow rate |
| cubic meter per second (m3/s)
|
70.07 |
acre-foot per day (acre-ft/d)
|
| cubic meter per year (m3/yr)
|
0.000811 |
acre-foot per year (acre-ft/yr)
|
| cubic hectometer per year (hm3/yr)
|
811.03 |
acre-foot per year (acre-ft/yr)
|
| meter per second (m/s)
|
3.281 |
foot per second (ft/s)
|
| meter per minute (m/min)
|
3.281 |
foot per minute (ft/min)
|
| meter per hour (m/hr)
|
3.281 |
foot per hour (ft/hr)
|
| meter per day (m/d)
|
3.281 |
foot per day (ft/d)
|
| meter per year (m/yr)
|
3.281 |
foot per year (ft/yr)
|
| cubic meter per second (m3/s)
|
35.31 |
cubic foot per second (ft3/s)
|
cubic meter per second per square kilometer
[(m3/s)/km2]
|
91.49 |
cubic foot per second per square mile
[(ft3/s)/mi2]
|
| cubic meter per day (m3/d)
|
35.31 |
cubic foot per day (ft3/d)
|
| liter per second (L/s)
|
15.85 |
gallon per minute (gal/min)
|
| cubic meter per day (m3/d)
|
264.2 |
gallon per day (gal/d)
|
cubic meter per day per square kilometer
[(m3/d)/km2]
|
684.28 |
gallon per day per square mile
[(gal/d)/mi2]
|
| cubic meter per second (m3/s)
|
22.83 |
million gallons per day (Mgal/d)
|
cubic meter per day per square kilometer
[(m3/d)/km2]
|
0.0006844 |
million gallons per day per square mile
[(Mgal/d)/mi2]
|
| cubic meter per hour (m3/h)
|
39.37 |
inch per hour (in/h)
|
| millimeter per year (mm/yr)
|
0.03937 |
inch per year (in/yr)
|
| kilometer per hour (km/h)
|
0.6214 |
mile per hour (mi/h)
|
| Mass |
| 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) |
| metric ton per day |
1.102 |
ton per day (ton/d)
|
| megagram per day (Mg/d)
|
1.102 |
ton per day (ton/d)
|
megagram per day per square kilometer
[(Mg/d)/km2]
|
2.8547 |
ton per day per square mile
[(ton/d)/mi2]
|
| megagram per year (Mg/yr)
|
1.102 |
ton per year (ton/yr)
|
| metric ton per year |
1.102 |
ton per year (ton/yr)
|
| Pressure |
| kilopascal (kPa)
|
0.009869 |
atmosphere, standard (atm)
|
| kilopascal (kPa)
|
0.01 |
bar |
| kilopascal (kPa)
|
0.2961 |
inch of mercury at 60°F (in Hg) |
| kilopascal (kPa)
|
0.1450 |
pound-force per inch (lbf/in)
|
| kilopascal (kPa)
|
20.88 |
pound per square foot (lb/ft2)
|
| kilopascal (kPa)
|
0.1450 |
pound per square inch (lb/ft2)
|
| Density |
| kilogram per cubic meter (kg/m3)
|
0.06242 |
pound per cubic foot (lb/ft3)
|
| gram per cubic centimeter (g/cm3)
|
62.4220 |
pound per cubic foot (lb/ft3) |
| Energy |
| joule (J)
|
0.0000002 |
kilowatthour (kWh)
|
| Radioactivity |
| becquerel per liter (Bq/L)
|
27.027 |
picocurie per liter (pCi/L)
|
| Specific capacity |
liter per second per meter
[(L/s)/m]
|
4.831 |
gallon per minute per foot
[(gal/min)/ft]
|
| Hydraulic conductivity |
| meter per day (m/d)
|
3.281 |
foot per day (ft/d)
|
| Hydraulic gradient |
| meter per kilometer (m/km)
|
5.27983 |
foot per mile (ft/mi)
|
| Transmissivity* |
| meter squared per day (m2/d)
|
10.76 |
foot squared per day (ft2/d)
|
| Application rate |
kilograms per hectare per year
[(kg/ha)/yr]
|
0.8921 |
pounds per acre per year
[(lb/acre)/yr]
|
| Leakance |
meter per day per meter
[(m/d)/m]
|
1 |
foot per day per foot
[(ft/d)/ft]
|
millimeter per year per meter
[(mm/yr)/m]
|
0.012 |
inch per year per foot
[(in/yr)/ft]
|
Temperature in
degrees Celsius (°C) may be converted to degrees Fahrenheit (°F) as follows:
°F=(1.8x°C)+32
Temperature in
degrees Fahrenheit (°F) may be converted to degrees Celsius (°C) as follows:
°C=(°F-32)/1.8
Vertical
coordinate information is referenced to the insert datum name (and
abbreviation) here, for instance, "North American Vertical Datum of 1988 (NAVD 88)"
Horizontal
coordinate information is referenced to the insert datum name (and
abbreviation) here, for instance, "North American Datum of 1983 (NAD 83)"
Altitude, as
used in this report, refers to distance above the vertical datum.
*Transmissivity:
The standard unit for transmissivity is cubic foot per day per square foot times foot of aquifer thickness [(ft3/d)/ft2]ft. In this report, the mathematically reduced form,
foot squared per day (ft2/d), is used for
convenience.
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).
NOTE TO USGS
USERS: Use of hectare (ha) as an alternative name for square hectometer (hm2) is restricted to the measurement of small land or
water areas. Use of liter (L) as a special name for cubic decimeter (dm3) is restricted to the measurement of liquids and
gases. No prefix other than milli should be used with liter. Metric ton (t) as
a name for megagram (Mg) should be restricted to commercial usage, and no
prefixes should be used with it.
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