Unit Conversion

Convert numbers between two units quickly and precisely

Resistance

Unit Conversion

Convert resistance units: ohm, kiloohm, and megaohm

Electrical resistance is measured in ohm (Ω), the SI unit. For line resistances, milliohm (mΩ) is common; for circuit components, kiloohm (kΩ); and for insulation resistance, megaohm (MΩ).

Key conversion factors:

  • 1 kiloohm (kΩ) = 1,000 ohm (Ω)
  • 1 megaohm (MΩ) = 1,000,000 ohm
  • 1 ohm (Ω) = 1,000 milliohm (mΩ)

Applications:

  • Circuit design: sizing resistors in the ohm to kiloohm range
  • Measurement technology: testing insulation resistance in megaohm
  • Electrical engineering: line resistances in milliohm for loss calculations

The resistance converter supports applying Ohm's law and comparing electronic components. For the associated voltage, use the voltage converter; for current, the current converter.

Frequently asked questions about converting resistance

Since 1 kiloohm (kΩ) equals 1,000 ohm (Ω), you divide the ohm value by 1,000 to convert it to kiloohm (e.g. 4,700 Ω = 4.7 kΩ). Conversely, you multiply by 1,000 to go from kiloohm to ohm.

Electrical resistance (ohm) describes purely the resistance to direct current. With alternating current, the reactance of coils and capacitors also comes into play, which is frequency-dependent – the combination of both is called impedance. It is also stated in ohm, but is a more complex, frequency-dependent quantity.

Ohm's law states R = U / I: resistance equals voltage (in volts) divided by current (in amperes). This converter then helps you put the result into the right unit (ohm, kiloohm, megaohm).