Free shipping on all US orders above $100*

Cart is empty
Cart totals
Tax (estimated for the United States (US))
Popular Search

Ohm's Law & Power Calculator

How to Apply

Ohm's Law in Electrical Circuits

Understanding the relationship between current, voltage, and resistance is pivotal for electrical calculations. Ohm's Law provides three core formulas to make these calculations easier:

Voltage (V) = Current (I) × Resistance (R)

Current (I) = Voltage (V) / Resistance (R)

Resistance (R) = Voltage (V) / Current (I)

To apply Ohm's Law in an electrical circuit, follow these steps:
  1. Identify Known Variables: Determine which variables you know: Voltage (V), Current (I), or Resistance (R).
  2. Choose the Appropriate Formula: Use one of the three formulas based on what you need to find out.
  3. Perform the Calculation: Plug the known values into the formula to find the unknown variable.

Note: Ohm's Law is generally applicable for resistive circuits. For circuits with inductors and capacitors, additional laws and formulas may apply.

ohms law diagram