| KERS | Kinetic Energy Recovery System |
| Kg | Kilogram |
| Kg/h | Kilograms per Hour |
| kHz | Kilohertz |
| km | Kilometer |
| km/h | Kilometers per Hour |
| km/l | Kilometers per Liter |
| KKK | Kuhnle,Kopp & Kausch (turbo manufacturers) |
| kPa | Kilopascal |
| KS | Knock Sensor |
| KV | Kinematic Viscosity |
| kV | Kilovolts |
| kW | KiloWatts |
