Multimeter Calculate Amps

A multimeter is an essential tool for anyone working with electrical circuits. It can measure voltage, resistance, and current (amps). In this article, we will explain how to calculate the current (amps) using a multimeter and provide a simple calculator for determining the current based on voltage and resistance.

What is Current (Amps)?

Current, measured in amperes (amps), is the flow of electric charge through a conductor. It is a fundamental concept in electrical engineering and crucial for understanding electrical circuits’ operation.

Using Ohm’s Law

To calculate current, we use Ohm’s Law, which states: I=VRI = \frac{V}{R}I=RV​ where:

  • III is the current in amperes (A)
  • VVV is the voltage in volts (V)
  • RRR is the resistance in ohms (Ω)

Steps to Measure Current Using a Multimeter

  1. Set the Multimeter to Measure Current: Turn the dial on your multimeter to the current (A) measurement mode. Some multimeters have separate ports for measuring high currents, so ensure you use the correct port.
  2. Connect the Probes: Insert the black probe into the standard (COM) port and the red probe into the port labeled for current measurement (often marked with an “A” or “10A”).
  3. Break the Circuit: Place the multimeter in series with the circuit to measure the current. This means you must disconnect one part of the circuit and connect the multimeter probes in line with the circuit.
  4. Read the Measurement: Once the multimeter is correctly connected, it will display the current flowing through the circuit.
ltimeter Calculate Amps

Using the Calculator

We have provided a simple calculator above for those who prefer not to measure directly or need a quick calculation. Here’s how to use it:

  1. Enter Voltage: Input the voltage (V) of your circuit.
  2. Enter Resistance: Input the resistance (Ω) of your circuit.
  3. Calculate: Click the “Calculate Amps” button, and the calculator will display the current (I) in amps.


Calculating current is a fundamental skill for anyone working with electrical circuits. By understanding and using Ohm’s Law, you can quickly determine the current in any circuit. The provided calculator offers a quick and easy way to make these calculations without measuring directly.

More Tools:

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