Ohm's Law Calculator
Please enter any two values and click "Calculate" to get the other values in the Ohm's law equations V = I × R and P = V × I.
Enter any two values and click "Calculate" to find the other values.
You must provide exactly two values to perform the calculation.
About Ohm's Law
What is Ohm's Law?
Ohm's Law is one of the fundamental laws in electrical engineering that describes the relationship between voltage, current, and resistance in an electrical circuit.
It states that the current flowing through a conductor is directly proportional to the voltage across it, provided all physical conditions remain constant.
How to Use This Calculator
This Ohm's Law calculator allows you to find voltage, current, resistance, or power when you know any two of these values.
Follow these simple steps to get accurate results for your electrical calculations.
Ohm's Law Formulas and Equations
Ohm's Law can be expressed in several equivalent forms, allowing you to calculate any of the four electrical properties (voltage, current, resistance, and power) when you know two of them.
Practical Applications of Ohm's Law
Ohm's Law is not just a theoretical concept but has numerous practical applications in everyday electronics and electrical engineering.
Frequently Asked Questions
Frequently asked questions about Ohm's Law and using this calculator.
What is Ohm's Law?
Ohm's Law is one of the fundamental laws in electrical engineering that describes the relationship between voltage, current, and resistance in an electrical circuit. It states that the current flowing through a conductor is directly proportional to the voltage across it, provided all physical conditions remain constant.
Historical Background
Ohm's Law was first published in 1827 by German physicist Georg Simon Ohm. His experiments demonstrated that the current flow through a conductor is directly proportional to the potential difference (voltage) and inversely proportional to the resistance.
Importance in Electronics
Ohm's Law forms the foundation for analyzing electrical circuits and is essential for designing and troubleshooting electronic systems. It allows engineers to predict how current will flow in a circuit based on voltage and resistance values.
Key Concepts
- Voltage (V): The electrical potential difference that drives current flow, measured in volts (V).
- Current (I): The rate of flow of electric charge, measured in amperes (A).
- Resistance (R): The opposition to current flow in a circuit, measured in ohms (Ω).
- Power (P): The rate at which electrical energy is transferred, measured in watts (W).