I  U  P  A  C

News & Notices

Organizations & People

Standing Committees



..By Year
..Other Committees




Links of Interest

Search the Site

Home Page


Abbreviated list of quantities, units and symbols in physical chemistry

5.1 units outside the SI: units used with the SI

Physical Quantity Unit Symbol for the Unit Value in SI Units SI Unit
time minute min 60 s
time hour h 3600 s
time day d 86 400 s
plane angle degree o (p/180) rad
volume litre l, L 10-3 m3
mass tonne t 103 kg
length angstrom Å 10-10 m
pressure bar bar 105 Pa
energy electronvolt* eV 1.60218 x 10-19 J
mass unified atomic mass unit* u 1.660 54 x 10-27 kg

(*defined in terms of best value of certain physical constants)

Page last modified 9 June 2000.
Copyright © 2000 International Union of Pure and Applied Chemistry.
Questions or comments about IUPAC, please contact, the Secretariat.
Questions regarding the website, please contact web manager.