Appendix B. Conversion Factors

UNITEQUALS
LENGTH
1 angstrom1 × 10−10 meter
 1 × 10−4 micrometer (micron)
1 centimeter10−2 meter
 0.3937 inch
1 foot12 inches
 0.3048 meter
1 inch25.4 millimeters
 2.54 centimeters
1 kilometer3281 feet
 0.5400 nautical mile
 0.6214 statute mile
 1094 yards
1 light-year9.461 × 1012 kilometers
 5.879 × 1012 statute miles
1 meter1010 angstroms
 3.281 feet
 39.37 inches
 1.094 yards
1 micron104 angstroms
 10−4 centimeter
 10−6 meter
1 nautical mile (International)8.439 cables
 6076 feet
 1852 meters
 1.151 statute miles
1 statute mile5280 feet
 8 furlongs
 1.609 kilometers
 0.8690 nautical mile
1 yard3 feet
 0.9144 meter
ANGLES
1 degree60 minutes
 0.01745 radian
 3600 seconds
 2.778 × 10−3 revolution
1 minute of arc0.01667 degree
 2.909 × 10−4 radian
 60 seconds
1 radian0.1592 revolution
 57.296 degrees
 3438 minutes
1 second of arc2.778 × 10−4 degree
 0.01667 minute
AREA
1 acre4047 square meters
 43560 square feet
1 are0.02471 acre
 1 square dekameter
 100 square meters
1 hectare2.471 acres
 100 ares
 10000 square meters
1 square foot144 square inches
 0.09290 square meter
1 square inch6.452 square centimeters
1 square kilometer247.1 acres
1 square meter10.76 square feet
1 square mile640 acres
 2.788 × 107 square feet
 2.590 square kilometers
VOLUME
1 board-foot144 cubic inches
1 bushel (U.S.)1.244 cubic feet
 35.24 liters
1 cord128 cubic feet
 3.625 cubic meters
1 cubic foot7.481 gallons (U.S. liquid)
 28.32 liters
1 cubic inch0.01639 liter
 16.39 milliliters
1 cubic meter35.31 cubic feet
 106 cubic centimeter
1 cubic millimeter ...

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