Kilohms

Kilohm is a unit of electrical resistance equal to 1,000 ohms. The symbol is kΩ, combining the SI prefix kilo- (10^3) with the ohm, the SI unit of resistance. One kilohm equals 1,000 ohms; conversely, 1 Ω equals 0.001 kΩ. Kilohms are widely used in electronics to express resistor values in a more compact form than using many ohms, especially in signaling circuits, biasing networks, and pull-up or pull-down configurations.

In practice, schematics and component markings use the kilo-ohm notation such as 4.7 kΩ or 22 kΩ. This avoids long strings of zeros (for example, 4700 Ω versus 4.7 kΩ). Resistors in the kilo-ohm range commonly appear in voltage dividers, sensor interfaces, and various interface circuits. Standard resistor series values (such as E12 and E24) include many kilo-ohm values, for example 1 kΩ, 1.5 kΩ, 2.2 kΩ, 4.7 kΩ, 10 kΩ, 22 kΩ, and 47 kΩ.

Kilohms are part of the SI system through the kilo- prefix and simply represent a scaled form of the ohm. When calculating, values can be converted to a single unit as needed: R_kΩ represents R_Ω divided by 1000. In measurement, multimeters typically display resistance in ohms or kilohms depending on the scale.