| Symbol[1] | Name of Quantity | Derived Units | Unit | Base Units |
|---|---|---|---|---|
| I | Electric current | ampere (SI base unit) | A | A (= W/V = C/s) |
| Q | Electric charge | coulomb | C | A·s |
| U, ΔV, Δφ; E | Potential difference; Electromotive force | volt | V | J/C = kg·m2·s−3·A−1 |
| R; Z; X | Electric resistance; Impedance; Reactance | ohm | Ω | V/A = kg·m2·s−3·A−2 |
| ρ | Resistivity | ohm metre | Ω·m | kg·m3·s−3·A−2 |
| P | Electric power | watt | W | V·A = kg·m2·s−3 |
| C | Capacitance | farad | F | C/V = kg−1·m−2·A2·s4 |
| E | Electric field strength | volt per metre | V/m | N/C = kg·m·A−1·s−3 |
| D | Electric displacement field | coulomb per square metre | C/m2 | A·s·m−2 |
| ε | Permittivity | farad per metre | F/m | kg−1·m−3·A2·s4 |
| χe | Electric susceptibility | (dimensionless) | - | - |
| G; Y; B | Conductance; Admittance; Susceptance | siemens | S | Ω−1 = kg−1·m−2·s3·A2 |
| κ, γ, σ | Conductivity | siemens per metre | S/m | kg−1·m−3·s3·A2 |
| B | Magnetic flux density, Magnetic induction | tesla | T | Wb/m2 = kg·s−2·A−1 = N·A−1·m−1 |
| Φ | Magnetic flux | weber | Wb | V·s = kg·m2·s−2·A−1 |
| H | Magnetic field strength | ampere per metre | A/m | A·m−1 |
| L, M | Inductance | henry | H | Wb/A = V·s/A = kg·m2·s−2·A−2 |
| μ | Permeability | henry per metre | H/m | kg·m·s−2·A−2 |
| χ | Magnetic susceptibility | (dimensionless) | - | - |