Resistance Converter
Convert between ohms, milliohms, kilohms, megaohms, gigaohms, abohms, statohms, and more instantly.
Result
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All conversions
What is Resistance Converter?
A resistance converter lets you switch between units of electrical resistance — how much a material opposes the flow of electric current. The SI unit is the ohm (Ω). Milliohms appear in wire and contact resistance; kilohms and megaohms in resistors and insulation testing. The abohm and statohm are CGS units encountered in classical electromagnetism.
How to use
- 1 Enter the resistance value in the Value field.
- 2 Select the unit you are converting from in the From dropdown.
- 3 Select the unit you want to convert to in the To dropdown.
- 4 The result and a full table of all equivalent resistances appear instantly.
- 5 Click the swap button to reverse the conversion.
Formula
Example calculation
A typical carbon film resistor is 10 kΩ = 10,000 Ω = 10,000,000 mΩ. To convert 4.7 MΩ to kΩ: 4.7 × 1000 = 4700 kΩ.
Frequently asked questions
What is Ohm's Law?
Ohm's Law states V = I × R: voltage (volts) equals current (amperes) multiplied by resistance (ohms). Rearranged: R = V/I. It describes the linear relationship between voltage and current in resistive materials at constant temperature.
What is the resistance of a typical resistor?
Common resistors range from 1 Ω to 10 MΩ. A 1 kΩ resistor is very common in signal circuits. LED current-limiting resistors are typically 220–470 Ω. Pull-up/pull-down resistors in digital circuits are often 4.7 kΩ or 10 kΩ.
What is insulation resistance?
Insulation resistance measures how well electrical insulation prevents current leakage. Good cable insulation exceeds 1 MΩ; high-quality insulation can be in the gigaohm (GΩ) range. It is tested with a megohmmeter (megger).
What is an abohm?
The abohm is the CGS-electromagnetic unit of resistance, equal to 10⁻⁹ Ω (1 nanoohm). It is extremely small and only found in older electromagnetic theory texts.
What does zero resistance mean in superconductors?
Superconductors exhibit exactly zero DC electrical resistance below a critical temperature. This allows current to flow without energy loss, enabling powerful electromagnets in MRI machines and particle accelerators.