Useful Conversion Factors between Units of Fundamental Physical Constants

 

Certain fundamental physical constants have special importance on account of their universality or place in fundamental theory. A lot of early scientific work was done using the CGS system that has as base units the centimetre, gram and second. The table below lists the more common conversion factors between SI and CGS units.

 

Table 1: Length
CGS unit	SI unit	Reciprocal
1 inch (in)	= 2.54 * 10-2 m	39.370079
1 foot (ft)	= 0.3048 m	3.280839
1 yard (yd)	= 0.9144 m	1.093613
1 mile (mi)	= 1.609344*103 m	6.213712 * 10-4

 

Table 2: Area
CGS unit	SI unit	Reciprocal
1 in2	= 6.4516 * 10-4m2	1.550003 *103
1 ft2	= 9.290304 * 10-2 m2	10.763910
1 yd2	= 0.836127 m2	1.195990
1 mi2	= 2.589988*106 m2	3.861022 * 10-7

 

 

Table 3: Volume
CGS unit	SI unit	Reciprocal
1 in3	= 1.638706 * 10-5m3	6.102374 *104
1 ft3	= 2.831685 * 10-2 m3	35.31467
1 yd3	= 0.764555 m3	1.307950

 

 

Table 4: Mass
CGS unit	SI unit	Reciprocal
1 ounce (oz)	= 2.834952 * 10-2 kg	35.273962
1 pound (lb)	= 0.45359237 kg	2.204623
1 ton	= 1.016047 * 103 kg	9.842065 * 10-4

 

 

Table 5: Miscellaneous
1 Â	= 10-10 m
1 amu	= 1.6605402 * 10-24 g
0 K	= -273.15 °C
1 Pa = 1 N.m-1	= 1 kg . m-1 .s-2
1 atm = 101,325 Pa	= 760 torr = 14.70 lb.in-2

 

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Relevant Posts

Fundamental Physical Constants

 

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References

1. P.J. Mohr and B.N. Taylor, J. Phys. Chem. Ref. Data, 28, 1713 (1999)
2.  P.J. Mohr and B.N. Taylor, Rev. Mod. Phys., 72, 351 (2000)
3. Physical Constants
4. R.M. Tennent, "Science Data Book", Oliver & Boyd, (1979)

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Key Terms

fundamental physical constants, chemical data, physical data, thermochemical data

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