Ohm's Law Calculator
Please provide any 2 values and click "Calculate" to get the other values in the Ohm's law equations V = I × R and P = V × I.
Result:
Ohm’s Law Calculator: Your Essential Electrical Engineering Tool
The Ohm’s Law Calculator is a powerful yet user-friendly web application designed to simplify electrical calculations for professionals, students, and hobbyists. Based on the fundamental principle V = I × R (Voltage = Current × Resistance) and its power derivative P = V × I, this tool instantly computes missing electrical values when any two parameters are provided.
Key Features:
✅ Smart Calculation – Automatically determines voltage (V), current (I), resistance (R), or power (P) with just two inputs
✅ Multi-Unit Support – Works with diverse units including volts/kV/mV, amps/mA, ohms/kΩ/MΩ, and watts/kW/MW/horsepower/BTU
✅ Educational Breakdown – Shows step-by-step solutions to help users understand the underlying math
✅ Professional-Grade Accuracy – Delivers precise results with 4 decimal places
✅ Responsive Design – Adapts seamlessly to desktops, tablets, and mobile devices
Perfect For:
Electrical engineers performing quick circuit analysis
Students learning foundational electronics concepts
DIY enthusiasts working on electronics projects
Educators demonstrating Ohm’s Law principles
With its intuitive purple-and-white gradient interface and instant calculations, this tool eliminates manual computation errors while making electrical theory accessible to everyone.
I love how easy this calculator makes things! Just pop in any two values, and it figures out the third for you. No need to do the math yourself—perfect for when your brain just needs a break!”