A. Length 



B. Area 



C. Volume 



D. Time 



E. Velocity; speed 



Table 1 



CONVERSION FACTORS 1 



Organization of Table 



F. Mass 



G. Density, specific volume 

 H. Viscosity 



I. Pressure 



J. Force 



K. Energy, work 



L. Power 



M. Energy per unit area 



N. Power per unit area 



O. Illumination, brightness, etc. 



A. Length: 



1 Angstrom unit (A.) 

 = 10"V 

 = 10-»cm. 



= 10- 10 m. 

 1 micron (ft) 

 = 10 4 A. 

 = KT* cm. 

 = 1<T m. 



1 millimeter (mm.) 



= 10" 1 cm. 



= 10^ m. 



= 0.039370079 in. 

 1- centimeter (cm.) 



= lO" 8 m. 



= 0.39370079 in. 



= 0.032808399 ft. 

 1 meter (m.) 



= 10* cm. 



= 3.2808399 ft. 



= 39.370079 in. 

 1 kilometer (km.) 



= 10 B cm. 



= l(fm. 



= 3280.8399 ft. 



= 0.621371 stat. mi. 



= 0.539593 naut. mi. 

 1 degree of latitude* (°lat.) 



= 111137 m. 



= 111.137 km. 



= 69.057 stat. mi. 



= 59.969 ss 60 naut. mi. 



B. Area: 



1 square millimeter (mm.*) 

 = 0.001550003 in. 8 



1 inch (in.) 



= 25.4 mm. 



= 2.54 cm. 

 1 foot (ft.) 



= 12 in. 



= 30.48 cm. 



= 0.3048 m. 

 1 yard (yd.) 



= 36 in. 



= 3 ft. 



= 91.44 cm. 



= 0.9144 m. 

 1 fathom (fath.) 



= 6 ft. 



= 1.8288 m. 

 1 rod (rd.) 



= 16.5 ft. 



= 5.0292 m. 

 1 statute mile (stat. 



= 5280 ft. 



= 0.868391 naut. mi. 



= 1609.344 m. 



= 1.609344 km. 

 1 U. S. nautical mile (naut. mi.) t 



= 6080.21 ft. 



= 1.151555 stat. mi. 



= 1853.248 m. 



= 1.853248 km. 

 1 British Admiralty nautical mile 



= 6080 ft. 



1 International nautical mile 

 = 1852 m. 

 = 6076.1 ft. 

 = 1.150779 stat. mi. 



1 square inch (in. 2 ) 

 = 6.4516 cm. 3 



mi.) 



* Average value, 1/90 of meridian quadrant. 



t See Introduction, p. 2. 



1 See Introduction for discussion of the basic conversion factors adopted. All metric-English unit 

 conversions are based on the factors: 



1 in. = 2.54 cm. 

 1 lb. = 453.5923 g. 



Fundamental conversion factors are in bold-face type. 



(continued) 



SMITHSONIAN METEOROLOGICAL TABLES 



