ClueLumaOhm's law calculator
Ohm's law
Voltage equals current times resistance for the stated resistive circuit.
Calculator
Enter the values you know and leave one box empty. Calculate finds the empty one, the result or any input.
Worked example
Given
- = 0.85 A
- = 100 Ω
Symbols and units
| Symbol | Meaning | Unit |
|---|---|---|
| voltage | V | |
| current | A | |
| resistance | Ω |
Related calculators
Results are estimates for study and screening. Check the inputs, units and assumptions before you use them for design, billing or contract decisions.