Système international and Legacy units

Parameter SI unit and symbol Legacy unit and symbol
Time second (s) second (s)
Length metre (m) centimetre (cm)
ångstrom (Å)
Mass kilogram (kg) gram (g)
Acceleration (ms−2) gal (gal)
Electric current ampere (A) [amperage] international ampere
abampere or Biot

statampere

Temperature kelvin (K)

degrees celsius (°C)

centigrade (°C)
Luminous intensity candela (cd) international candle
Amount of substance mole (mol) No legacy unit
Frequency hertz (Hz) cycles per second
Energy joule (J) erg (erg)
Power watt (W) (erg/s)
Horsepower (HP)
Pferdestärke (PS)
Force Newton (N) dyne (dyn)
Pressure Pascal (Pa) barye (Ba)
Electric charge coulomb (C) abcoulomb
statcoulomb or Franklin
Potential difference volt (V) international volt
abvolt
statvolt
Capacitance farad (F) abfarad
statfarad
Inductance henry (H) abhenry
stathenry
Electric resistance ohm (Ω) international ohm
abohm

statohm

Electric conductance siemen (S) mho
abmho
statmho
Magnetic flux weber (Wb) maxwell (Mx)
Magnetic flux density tesla (T) gauss (G)
Magnetic field strength (A/m2) oersted (Oe)
Dynamic viscosity (Pa·s) poise (P)
kinematic viscosity (m2s−1) stokes (St)
Luminous flux lumen (lm) Stilb (unit) (sb)
Illuminance lux (lx) phot (ph)
[radioactive] activity bequerel (Bq) curie (Ci)
Absorbed [radiation] dose gray (Gy) roentgen (R)

rad (rad)

Radiation dose equivalent sievert Roentgen equivalent man (rem)
Catalytic activity katal (kat) No legacy unit

Source:

Wikipedia, < http://en.wikipedia.org/wiki/Metric_system >,
June 19th, 2011.

(CC) http://creativecommons.org/licenses/by-sa/3.0/.