Resistance Converter
Convert
Enter a value and pick the source and target units; the result updates live.
Resistance is the opposition a component offers to current flow, measured in ohms (Ω). It's the "R" in Ohm's law (V = I·R) and determines how much current a given voltage will push through a circuit.
Resistor values span a huge range — from milliohms in current-sense shunts to megohms in pull-up and insulation-resistance measurements. Converting between mΩ, Ω, kΩ and MΩ keeps you from misreading a 4.7 kΩ resistor as 4.7 Ω.
Common applications
Reading a resistor's value off its color code in kΩ; specifying a current-sense shunt in mΩ; checking insulation resistance in MΩ; selecting a pull-up resistor in kΩ.
Frequently asked questions
Resistance is the opposition to current flow, measured in ohms (Ω). It relates voltage and current via Ohm's law: V = I·R.
1 kΩ = 1000 Ω. Multiply by 1000.
Milliohm resistors (shunts) are used for current sensing — a small voltage drop across them is proportional to the current, without adding much loss.