Resistance Converter

Convert electric resistance units like ohm, kilohm.

Convert Units

Result:
Convert electric resistance measurements between ohm, kilohm, megohm, and more.

What is Electric Resistance Converter?

Electrical resistance is the opposition a material offers to the flow of electric current. Higher resistance means less current for a given voltage. Defined by Ohm's Law (V = IR), resistance determines how circuits behave and how much heat is generated.

Understanding the Units

Ohm (Ω)

The SI derived unit of electrical resistance. One ohm allows one ampere to flow under one volt.

Common Uses: Resistors, wire resistance, small circuit components

Kiloohm (kΩ)

One thousand ohms.

Common Uses: Pull-up resistors, voltage dividers, general electronics

Conversion: 1 kΩ = 1,000 Ω

Megaohm (MΩ)

One million ohms.

Common Uses: Insulation testing, high-impedance circuits, input impedances

Conversion: 1 MΩ = 1,000,000 Ω

Common Conversions

  • LED current-limiting resistor: 220–470 Ω
  • Typical signal resistor: 1 kΩ to 100 kΩ
  • Human body resistance (dry skin): 100 kΩ–1 MΩ
  • Good electrical insulation: >1 MΩ
  • Short circuit: near 0 Ω

Conversion Formulas

  • Ohm's Law: R = V/I (Resistance = Voltage ÷ Current)
  • Power dissipated: P = I² × R
  • Series resistors: R_total = R1 + R2 + R3 ...
  • Parallel resistors: 1/R_total = 1/R1 + 1/R2 + ...
  • Ω to kΩ: kΩ = Ω ÷ 1,000 | kΩ to MΩ: MΩ = kΩ ÷ 1,000

Practical Examples

Resistor colour bands encode resistance value in ohms or kilohms

Electric toaster heating element: ~12–15 Ω

Smartphone speaker: ~8 Ω impedance

Good insulation (electrical cable): >1 MΩ between conductors

When to Use Each Unit

Ohm (Ω): Small resistors, wire resistance, low-impedance circuits
Kiloohm (kΩ): General electronics, op-amp feedback networks, pull-up resistors
Megaohm (MΩ): Insulation testing, high-impedance amplifier inputs

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