Back to Table of Contents

The information in this table has not been updated since 1965. A better source to check for more current information is:
The Cambridge University Press Handbook of Space Astronomy and Astrophysics

Table X. - Energy Conversion Factors (Recommended by NAS-NRC, 1963)

Formula Factor Error Limit Conversion
Systeme International (MKSA) Centimeter-gram second (CGS)
Electron-volt eV 1.60210 7 X 10-19 J(eV)-1 X 10-12 erg(eV)-1
Energy associated with
--Unified atomic mass unit c2/Ne 9.31478 15 108 eV u-1 108 eV u-1
--Proton mass mpc2/e 9.38256 15 108 eV mp-1 108 eV mp-1
--Neutron mass mnc2/e 9.39550 15 108 eV mn-1 108 eV mn-1
--Electron mass mec2/e 5.11006 5 105 eV me-1 105 eV me-1
--Cycle c/h 2.41804 7 1014 Hz(eV)-1 1014 s-1(eV)-1
--Wavelength ch/e 8.06573 23 10-6 eV m 10-4 eV cm
--Wave number e/ch 8.06573 23 105 m-1(eV)-1 103 cm-1(eV)-1
--°K e/k 1.16049 16 104 °K(eV)-1 104 °K(eV)-1

Back to Table of Contents