4. SI Derived Units Whose Names and Symbols Include SI Derived Units with Special Names and Symbols
| Quantity | Name | Symbol |
| dynamic viscosity | pascal second | Pa ⋅ s |
| moment of force | newton meter | N ⋅ m |
| angular velocity | radian per second | rad/s |
| angular acceleration | radian per second squared | rad/s2 |
| heat flux density, irradiance | watt per square meter | W/m2 |
| heat capacity, entropy | joule per kelvin | J/K |
| specific heat capacity, specific entropy | joule per kilogram kelvin | J/(kg ⋅ K) |
| specific energy | joule per kilogram | J/kg |
| energy density | joule per cubic meter | J/m3 |
| thermal conductivity | watt per meter kelvin | W/(m ⋅ K) |
| electric field strength | volt per meter | V/m |
| electric charge density | coulomb per cubic meter | C/m3 |
| electric flux density | coulomb per square meter | C/m2 |
| permittivity | farad per meter | F/m |
| permeability | henry per meter | H/m |
| molar energy | joule per mole | J/mol |
| molar entropy, molar heat capacity | joule per mole kelvin | J/(mol ⋅ K) |
| exposure (x and γ rays) | coulomb per kilogram | C/kg |
| absorbed dose rate | gray per second | Gy/s |
| radiant intensity | watt per steradian | W/sr |
| radiance | watt per square meter steradian | W/(m2 ⋅ sr) |
5. Units Outside the SI that Are Accepted for Use with the SI
| Name | Symbol | Value in SI units |
| minute | min | 1 min = 60 s |
| hour | h | 1 h = 60 min = 3600 s |
| day | d | 1 d = 24h = 86400 s |
| liter | L | 1 L = 1dm3 = 10−3 m3 |
| metric tone | t | 1 t = 103 kg |
| bel | B | 1B = 10dB |
| degree (angle) | 0 | 10 = (π/180) rad |
| minute (angle) | ' | 1′ = (1/60)0 = = (π/10800)rad |
| second (angle) | '' | 1″ = (1/60)′ = = (π/648000)rad |
| electronvolt | eV | 1 eV = 1.60218×10−19 J |
| unified atomic mass unit | u | 1 u = 1.66054×10−27 kg |
| astronomical unit | ua | 1 ua = 1.49598×1011m |
| nautical mile | 1 nautical mile =1852 m | |
| knot | 1 knot = 1852/3600 m/s | |
| are | a | 1 a = 100 m2 |
| hectare | ha | 1 ha = 100 a = 104m2 |
| bar | bar | 1 bar = 102 kPa = 105 Pa |
| angstrom |
 |
1 |
| curie | Ci | 1 Ci = 3.7×1010 Bq |
| rad | rad | 1 rad = 10−2Gy |
| rem | rem | 1 rem = 10−2Sv |
