Ohm's Law Calculator
How to use the Ohm's Law Calculator
- Enter any two of voltage (V), current (A), and resistance (Ω).
- Leave the third field empty — the calculator solves for the missing value using V = I × R.
- Results update instantly in your browser.
Why calculate locally?
Your inputs for Ohm's Law Calculator are processed entirely in browser memory. Financial and personal numbers are never sent to a server, stored in a database, or retained after you close the tab. This makes local calculation ideal for sensitive payroll, pricing, and business data.
Frequently asked questions
How many values do I need to enter?
Exactly two. The calculator solves for the third unknown using Ohm's law (V = I × R).
What units are used?
Volts (V) for voltage, amperes (A) for current, and ohms (Ω) for resistance.
Is this Ohm's Law Calculator free?
Yes. Every calculator on calculate.logicapplabs.com is free with no account required.