A. 7. METRIC (SI) CONVERSION FACTORS
531
Table A.4: Conversion Factors
Exact Conversion Value
Multiply
By
To Obtain
Length
mil .......................................
25.4 *
............... micrometers
inches ..................................
25.4 *
................. millimeters
inches ..................................
2.54 *
................. centimeters
feet ......................................
30.48 *
................ centimeters
feet ......................................
0.304 8 *
yards ....................................
0.914 4 *
fathoms ...............................
1.828 8 *
.......................... meters
statute miles (U.S.)...........
1 609.344 *
.......................... meters
statute miles (U.S.)...........
1.609 344 *
.................. kilometers
nautical miles (internat.) .
1 852.0 *
......................... meters
nautical miles (internat.) .
1.852 *
.................. kilometers
Area
square inches ......................
6.451 6 *
.... square centimeters
square feet .........................
929.030
.... square centimeters
square feet .........................
0.092 903
............... square meters
square yards.......................
0.836 127
............... square meters
acres ....................................
0.404 686
...................... hectares
acres ....................................
4 046.86
............... square meters
square miles (U.S. statute)
2.589 99
....... square kilometers
Volume
cubic inches .......................
16.387 1
....... cubic centimeters
cubic feet ...........................
0.028 316 8
............... cubic meters
cubic yards .........................
0.764 555
............... cubic meters
cubic yards per foot .........
2.508 38
cubic meters per meter
Liquid Capacity
fluid ounces (U.S.).............
29.573 5
....... cubic centimeters
fluid ounces (U.S.).............
29.573 5
.................... milliliters
liquid pints (U.S.) .............
0.473 176
.......................... liters
quarts (U.S.) ......................
0.946 353
.......................... liters
gallons (U.S.) ....................
3.785 41
.......................... liters
gallons (U.K.) ....................
4.546 09
....................... liters
cubic feet .
28.316 8
..................... liters
acre-feet...............................
1 233.48
.................cubic meters