| Quantity | Symbol | Unit | Unit symbol |
|---|---|---|---|
| Current | I | ampere | A |
| Voltage | V | volt | V |
| Resistance | R | ohm | Ω |
| Power | P | watt | W |
| Energy | E | joule | J |
| Charge | Q | coulomb | C |
| Frequency | f | hertz | Hz |
| Capacitance | C | farad | F |
| Inductance | L | henry | H |
| Prefix | Symbol | Multiplier |
|---|---|---|
| giga | G | 10⁹ |
| mega | M | 10⁶ |
| kilo | k | 10³ |
| milli | m | 10⁻³ |
| micro | µ | 10⁻⁶ |
| nano | n | 10⁻⁹ |
| pico | p | 10⁻¹² |
Conversion examples. 4.7 kΩ = 4700 Ω. 250 mA = 0.25 A. 100 µF = 0.0001 F. 2.2 MΩ = 2 200 000 Ω.