Ohm's Law Calculator
Calculate voltage, current, or resistance using Ohm's Law. Perfect for electronics, engineering, circuit design, and electrical calculations.
Examples:
- If I = 2A and R = 5Ω, then V = 10V (Voltage = Current × Resistance)
- If V = 12V and R = 4Ω, then I = 3A (Current = Voltage ÷ Resistance)
- If V = 9V and I = 0.5A, then R = 18Ω (Resistance = Voltage ÷ Current)
- If I = 0.1A and R = 220Ω, then V = 22V
- If V = 5V and I = 0.02A, then R = 250Ω
About Our Ohm's Law Calculator
Our Ohm's Law Calculator is a precise and user-friendly tool designed to help you find voltage, current, or resistance in electrical circuits. Whether you're a student learning electronics, an engineer designing circuits, or a hobbyist working on DIY projects, our calculator provides accurate and comprehensive results.
What is Ohm's Law?
Ohm's Law is a fundamental principle in electrical engineering that describes the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit. The law states that the current flowing through a conductor is directly proportional to the voltage and inversely proportional to the resistance. This relationship is expressed by the equation V = I × R.
Key Features:
- Calculate voltage, current, or resistance with ease
- Get results with multiple decimal precision levels
- Simple and intuitive user interface
- Real-time formula display for educational purposes
- Perfect for students, engineers, and hobbyists
Applications of Ohm's Law:
- Electrical Engineering: Design and analysis of circuits
- Electronics: Determining component values for circuit design
- Power Engineering: Calculating power transmission parameters
- Automotive: Diagnosing electrical system issues
- Home Electronics: Troubleshooting appliances and electrical devices
- Education: Teaching the fundamentals of electrical theory
- DIY Projects: Building custom electronic circuits
Understanding the Units:
- Voltage (V): Measured in volts (V), represents the electrical pressure that causes current to flow
- Current (I): Measured in amperes (A), represents the flow rate of electric charge
- Resistance (R): Measured in ohms (Ω), represents opposition to the flow of current
Extended Ohm's Law Formulas:
Ohm's Law can be extended to calculate power in electrical circuits:
- Power (P) = Voltage (V) × Current (I)
- Power (P) = Current² (I²) × Resistance (R)
- Power (P) = Voltage² (V²) ÷ Resistance (R)
Perfect for students, teachers, professionals, and hobbyists working with electrical circuits. Simply select what you want to calculate, input your known values, and get the results instantly.