Ohm's Law Calculator — science and physics formula calculators
The Ohm's Law Calculator computes voltage, current, or resistance from any two known electrical values using V = I × R. Enter two quantities and the missing value is calculated automatically. Use it for circuit analysis, electronics projects, and electrical engineering homework.
Category: Physics
About this tool
What Is Ohm's Law Calculator? Ohm's Law Calculator is a browser-based tool for Calculate voltage, current, and resistance using Ohm's law. This guide explains the result, the calculation or processing method, and correct usage. Calculation or Processing Method Enter any two known electrical quantities. The tool rearranges Ohm's law to solve for the missing voltage, current, or resistance. Formula or method: Ohm's law: V = I × R. Rearranged forms are I = V / R and R = V / I. Further reading: Wikipedia reference . How to Use It Open the tool and choose the required unit, mode, or options. Enter values or paste text into the input fields. Review the result, copy it, or continue with a related tool. Important Notes Use consistent units and verify values before calculating. Incomplete or invalid input can produce an incomplete result. Related Tools Tools that support the same workflow: Electric Power Calculator — Calculate electrical power, voltage, and current. Electrical Resistance Calculator — Calculate series and parallel electrical resistance. Resistor Color Code Calculator — Decode resistor color bands and calculate resistance. Frequently Asked Questions How does Ohm's Law Calculator work? Enter any two known electrical quantities. The tool rearranges Ohm's law to solve for the missing voltage, current, or resistance. What formula does Ohm's Law