| Physical quantity | Units |
| Fundamental units | |
| Length (l) | Metre (m) |
| Mass (m) | Kilogram (kg) |
| Time (t) | Second (s) |
| Temperature (T) | Kelvin (K) |
| Electric current (I) | Ampere (A) |
| Luminous intensity(Iv) | Candela (cd) |
| Amount of substance (n) | Mole (mol) |
| Supplementary units | |
| Plane angle (α, β, θ, φ ) | Radian (rad) |
| Solid angle (Ω) | Steradian (sr) |
| Quantity | Symbol | Units |
| Linear velocity | V | m/s |
| Linear acceleration | a | m/s2 |
| Angular velocity | ω | rad/s |
| Angular acceleration | α | rad/s2 |
| Mass density | ρ | kg/m3 |
| Force, Weight | F, W | N ; 1N = 1kg-m/s2 |
| Pressure | P | N/m2 |
| Work, Energy, Enthalpy | W, E, H | J ; 1J = 1N-m |
| Power | P | W ; 1W = 1J/s |
| Absolute or dynamic viscosity | μ | N-s/m2 |
| Kinematic viscosity | v | m2/s |
| Frequency | f | Hz ; 1Hz = 1cycle/s |
| Gas constant | R | J/kg K |
| Thermal conductance | h | W/m2 K |
| Thermal conductivity | k | W/m K |
| Specific heat | c | J/kg K |
| Molar mass or Molecular mass | M | kg/mol |