Calculate voltage, current, resistance, and power using Ohms Law. Perfect for electronics, electrical engineering, and circuit design.
For energy calculations (1 hour = 3600s)
This calculator uses Ohms Law (V = I × R) and power formulas to solve electrical circuit problems. It can calculate any missing value when you know two of the three basic electrical quantities: voltage, current, and resistance. The calculator also computes power, energy consumption, and provides safety information based on voltage levels. Perfect for electronics hobbyists, students, and electrical engineers.
Our comprehensive Ohms Law calculator helps electronics enthusiasts, students, and electrical engineers solve circuit problems with precision and ease. This essential tool provides accurate calculations for voltage, current, resistance, and power, supporting both educational and professional electrical applications.
Electrical potential
Electron flow rate
Flow opposition
Energy per second
Select the calculation type (voltage, current, resistance, or power), enter the known values, and the calculator will automatically compute the missing quantities. The tool provides comprehensive results including power, energy, efficiency, and safety information for informed circuit design.
Voltage Units:
Current Units:
Limit current flow
Store electrical charge
Store magnetic energy
Always verify your Ohms Law calculations by checking that the relationships make sense. Remember that power increases with both voltage and current, and resistance limits current flow. For safety, always check component ratings and use appropriate protection devices. When working with complex circuits, break them down into simpler parts and apply Ohms Law step by step. Keep a reference of common component values and always double-check your units and calculations.