GFK-0356Q Appendix K Tables and Formulas K-5
K
English and Metric Equivalents
This section is based upon information published on the World Wide Web by the U.S.
government’s National Institute of Standards and Technology (NIST). For further information,
visit their web site at www.nist.gov.
Table K-5. Length Equivalents
Units of Length (Underlined Figures are Exact)
Units Inches Feet Yards Millimeters Centimeters Meters
1 inch = 1 0.083 333 0.027 777 25.4 2.54 0.025 4
1 foot = 12 1 0.333 333 304.8 30.48 0.304 8
1 yard = 36 3 1 914.4 91.44 0.914 4
1 mile = 63,360 5,280 1,760 1,609,344 160,934.4 1,609.344
1 mm = 0.0393 700 0.003 280 8 0.001 093 6 1 .1 .001
1 cm = 0.393 700 8 0.032 808 0.010 936 10 1 0.01
1 meter = 39.370 08 3.280 840 1.093 613 1000 100 1
Table K-6. Area Equivalents
Units of Area (Underlined Figures are Exact)
Units Square
Inches
Square Feet Square
Yards
Square
Centimeters
Square Meters
1 square inch =
1 0.006944 0.000 771 604 9 6.451 6 0.000 645 16
1 square foot =
144 1 0.111111 929.030 4 0.092 903 04
1 square yard =
1296 9 1 8,361.273 6 0.836 127 36
1 square mile =
4,014,489,600 27,878,400 3,097,600 25,899,881,103.36 2,589,988.110 336
1 square
centimeter =
0.155 000 3 0.001 076 391 0.0001195990 1 0.0001
1 square meter =
1,550.003 10.763 91 1.195 990 10,000 1
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