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Ohms Law Calculators

Ohm's Law

This Ohms Law Calculator uses the Ohms Law equation to calculate Voltage, Current or Resistance.

​Ohm’s Law is the definition of the relationship between Voltage Current and Resistance. It states that the relationship between voltage and resistance is directly proportional to the resistance of the conductor. The Ohms Law is defined by the following equation:

Where:
I = Current
V = Voltage
R = Resistance

​The Ohm's Law Equation can also be rearranged to calculate Voltage and Resistance:

Ohms Law for Voltage Equation

Normal Strain is a measure of a materials dimensions due to a load deformation. It takes the initial length and the extension of that length due to the load and creates a ratio of the two.

Ohm's Law Voltage Calculator

kA A mA Current
Ω kΩ MΩ   Resistance



kV mV V Voltage



CalculateClear

Ohm's Law for Resistance Equation

Ohm's Law Resistance Calculator

kA A mA Current
kV mV V Voltage



Ω kΩ MΩ   Resistance



CalculateClear

Example:

For example, take the simple circuit below:

Taking this very simple circuit, we can see there is a Battery supplying a Voltage of 9v, and a resistor applying 100 ohms of resistance in the circuit. Using the Ohms Law Calculator, we know that the equation states that the current pulled by the resistor would equal the voltage; in this case 9 volts, divided by the resistance; 100 Ohms:

​Using the Ohm’s Law Calculator for Current: 9v divided by a resistance of 100 Ohms equals 0.09Amperes, or 90millamps.