Handbook of Electrical Engineering

Appendix I

Conversion Factors for the SI System

of Units

(Note, the abbreviation SI means Systeme International d’Unit` `es, ref: 11thGeneral Conference of
Weight and Measures, date 1960). The conversion factors shown below can be found in many doc-
uments, for example in References 1 to 7 are a few sources.

I.1 Fundamental SI Units

Seven basic units

Quantity Name of SI unit Symbol

Amount of a substance mole mol

Current ampere A

Length metre m

Luminous intensity candela cd

Mass kilogram kg

Temperature Kelvin K

Time seconds s

Two additional SI units

Quantity Name of SI unit Symbol

Plain angle radian rad

Solid angle steradian sr

I.2 Derived Non-electrical Units

Non-electrical units Name of SI unit Symbol

Energy, work done and heat joule J

Force newton N

(continued overleaf)

Handbook of Electrical Engineering: For Practitioners in the Oil, Gas and Petrochemical Industry. Alan L. Sheldrake
2003 John Wiley & Sons, Ltd ISBN: 0-471-49631-6