Conversion Factors
U.S. customary units to International System of Units
Multiply | By | To obtain |
Length |
foot (ft) | 0.3048 | meter (m) |
mile (mi) | 1.609 | kilometer (km) |
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 mile (mi2) | 259.0 | hectare (ha) |
square mile (mi2) | 2.590 | square kilometer (km2) |
Volume |
acre-foot (acre-ft) | 1,233 | cubic meter (m3) |
acre-foot (acre-ft) | 0.001233 | cubic hectometer (hm3) |
Flow rate |
foot per second (ft/s) | 0.3048 | meter per second (m/s) |
cubic foot per second (ft3/s) | 0.02832 | cubic meter per second (m3/s) |
International System of Units to U.S. customary units
Multiply | By | To obtain |
Length |
kilometer (km) | 0.6214 | mile (mi) |
kilometer (km) | 0.5400 | mile, nautical (nmi) |
Area |
square meter (m2) | 0.0002471 | acre |
Volume |
cubic meter (m3) | 35.31 | cubic foot (ft3) |
cubic meter (m3) | 0.0008107 | acre-foot (acre-ft) |
Abbreviations
ERF1_2 | U.S. Geological Survey Enhanced River Reach File |
NHD | National Hydrography Dataset |
NID | National Inventory of Dams |
NIDID | National Inventory of Dams Identification Number |
RMD | Reservoir Morphology Database |
SPARROW | SPAtially Referenced Regressions on Watershed attributes model |
USGS | U.S. Geological Survey |
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First posted September 13, 2017
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