General units

 Length  metre: m
 Weigth  kilograms: kg
 Time  seconds: s
 Amperage  ampere: A
 Thermodynamic temperature  kelvin: K
 Amount of substance  mol: mol
 Luminosity  candela: cd

SI - prefixes

Exponent (to base 10) of decimals: E n = 10n

Factor Prefixes Symbol:

1024 E 24 yotta Y
1021 E 21 zetta Z
1018 E 18 exa E
1015 E 15 peta P
1012 E 12 tera T
109  E 9 giga G
106  E 6 mega M
103  E 3 kilo k
102  E 2 hecto h
101  E 1 deca da
10-1 E -1 deci d
10-2 E -2 centi c
10-3 E -3 milli m
10-6 E -6 micro µ
10-9 E -9 nano n
10-12 E-12 pico p
10-15 E-15 femto f
10-18 E-18 atto a
10-21 E-21 zepto z

10-24 E-24 yocto y

Derived SI-Units:
(Note: all units right from slash should be the bottom of the fracture)

    Hertz: Hz = 1/s
    Newton: N = m kg/s2
Pressure, mechanical voltage
    Pascal: Pa = N/m2 = kg/m s2
Energy, work, heat quantity
    Joule: J = N m = m2 kg/s2
    Watt: W = J/s = m2 kg/s3
Electric charge
    Coulomb: C = s A
Electric tension
    Volt: V = W/A = m2 kg/s3 A
    Farad: F = C/V = s4 A2/m2 kg
Electric resistance
    Ohm: Omega = V/A = m2 kg/s3 A2
Electric admittance
    Siemens: S = A/V = s3 A2/m2 kg
Magnetic flux
    Weber: Wb = V s = m2 kg/s2 A
Magnetic induction
    Tesla: T = Wb/m2 = kg/s2 A
    Henry: H = Wb/A = m2 kg/s2 A2
Light flux
    Lumen: lm = cd sr
    Lux: lx = lm/m2 = cd sr/m2
    Becquerel: Bq = 1/s
Radiation absorbed dose
    Gray: Gy = J/kg = m2/s2
Absolute viscosity
    Pascal second: Pa s = kg/m s
Torsional moment
    Newton metre: N m = m2 kg/s2
Surface tension
    Newton per metre: N/m = kg/s2
Heat flux density
    Watt per square metre: W/m2 = kg/s3
Heat capacity, entropy
    Joule per kelvin: J/K = m2 kg/s2 K
Specific heat capacity, specific entropy
    Joule per kilogram kelvin: J/kg K = m2/s2 K
Specific energy
    Joule per kilogram: J/kg = m2/s2
Thermal conductivity
    Watt per metre kelvin: W/m K = m kg/s3 K
Energy density
    Joule per cubic metre: J/m3 = kg/m s2
Electric field strength
    Volt per metre: V/m = m kg/s3 A
Electric change density
    Coulomb per cubix metre: C/m3 = s A/m3
Electric flux density
    Coulomb per square metre: C/m2 = s A/m2
    Farad per metre: F/m = s4 A2/m3 kg
    Henry per metre: H/m = m kg/s2 A2
Molar energy
    Joule per Mol: J/mol = m2 kg/s2 mol
Molar entropy, molar heat capacity
    Joule per mol Kelvin: J/mol K = m2 kg/s2 K mol
    Coulomb per kilogram: C/kg = s A/kg
Absorbed dose rate
    Gray per second: Gy/s = m2/s3

Source: SI - Systeme