Measuring Resistance with a Multimeter

Measuring Resistance

Resistance is measured with a Ohmeter. If you are using a multimeter, you will need to switch the measurement setting to Ohms or .

To measure resistance, the component may need to be taken out of circuit if there is a possibility that the resistance of other components may affect the reading.


  • You must disconnect the power to the circuit before measuring Resistance. The meter will supply its own power to get the reading. NOTE: Low batteries on your multimeter can affect the reading!
Schematic Symbol Description Circuit Schematic Reference
Ohmmeter Schematic Symbol Ohmmeter (Resistance Meter)  


Ohmmeter Connection Schematic
Figure 9 A Diagram showing component in circuit being measured for resistance with an ohmmeter


No harm should come to your meter or component if you are in the wrong resistance range. You will either get an infinite resistance reading (or OL on a digital meter) if the range is too high, or a Zero reading if the range is too low. Select a different resistance range to get a more specific result.

As resistance readings do not require the components to be in circuit, it can be a good way to check their values, before connecting them to the circuit.

Shopping around:

Ecobion Labs link to Multimeters on Ebay

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