Electrical Resistance Converter — Ohms, kΩ & MΩ

Convert between ohms, milliohms, kiloohms, megaohms, and gigaohms.

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How this conversion works. Every unit is converted through the ohm using exact SI prefixes; CGS units use factors from NIST Special Publication 811.

How to use

  1. Choose the units to convert from and to.
  2. Enter a value — the converted result updates instantly.
  3. Click Copy to copy the result to your clipboard.

Frequently asked questions

How do I convert kiloohm to ohm?

1 kiloohm = 1000 ohm. Choose "Kiloohm (kΩ)" as From and "Ohm (Ω)" as To, type a value, and the result updates instantly.

What does 4K7 mean on a schematic?

The letter marks the decimal point: 4K7 = 4.7 kΩ = 4,700 Ω. Similarly 2M2 = 2.2 MΩ and R47 = 0.47 Ω.

When do milliohms matter?

Current-sense shunts, PCB traces, and battery internal resistance all live in the mΩ range — a 10 mΩ shunt at 10 A drops 100 mV and dissipates 1 W.

Is my data sent to a server?

No. Conversions run entirely in your browser using fixed factors — nothing is uploaded or logged.

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