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Ohm's Law Calculator

The Ohm's Law Calculator will calculate the:

  1. Current flowing in a part of an electrical circuit (around a circuit component)
  2. Current flowing in the main branch of the whole circuit
Ohm's Law Calculator
Ohm's Law Calculator Results (detailed calculations and formula below)
The current flowing in a part of an electrical circuit (around a circuit component) is A [Amps]
The current flowing in the main branch of a circuit is A [Amps]
Current in the specific part of circuit calculation
I = ∆V/R
I = /
I =
Current flowing in the main branch of circuit calculation
Itot = ε/R + Rw + r
Itot = / + +
Itot = /
Itot =
Ohms Law Calculator Input Values
Resistance of the circuit component (R) Ω [Ohm]
Resistance of conducting wire (Rw) Ω [Ohm]
Resistance of battery (r) Ω [Ohm]
Potential difference across the circuit component (ΔV) V [Volt]
Electromotive force of the source (ε) V [Volt]

Please note that the formula for each calculation along with detailed calculations are available below. As you enter the specific factors of each ohms law calculation, the Ohms Law Calculator will automatically calculate the results and update the Physics formula elements with each element of the ohms law calculation. You can then email or print this ohms law calculation as required for later use.

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Discover Physics with free Physics Revision Notes and Physics Calculator: Ohms Law. This image shows the properties and ohms law formula for the Ohms Law. The Ohm's Law Calculator will calculate the current flowing in a part of an electrical circuit (around a circuit component) and the current flowing in the main branch of the whole circuit

Related Physics Chapters with Tutorials

Section 14: Electrostatics

Current in the specific part of circuit Formula and Calculation

I = ∆V/R

Current flowing in the main branch of circuit Formula and Calculation

Itot = ε/R + Rw + r

Electrodynamics Physics Tutorials associated with the Ohms Law Calculator

The following Physics tutorials are provided within the Electrodynamics section of our Free Physics Tutorials. Each Electrodynamics tutorial includes detailed Electrodynamics formula and example of how to calculate and resolve specific Electrodynamics questions and problems. At the end of each Electrodynamics tutorial you will find Electrodynamics revision questions with a hidden answer that reveals when clicked. This allows you to learn about Electrodynamics and test your knowledge of Physics by answering the test questions on Electrodynamics.

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