Ohm's Law Resistance Calculator
Determine electrical resistance using voltage divided by current. Enter voltage and current and press Calculate.
Ideal calculation; real components have tolerances and reactance.
Examples
- 10 V / 2 A ⇒ 5 Ω
- 5 V / 0.5 A ⇒ 10 Ω
- 12 V / 3 A ⇒ 4 Ω
FAQ
What if current is zero?
Resistance becomes undefined; current must be nonzero.
What unit is the result?
Ohms (Ω).
Does this apply to AC and DC?
It represents ideal conditions; real circuits may differ.
Additional Information
No additional information available.
Document resistance with ampere context
Pair these results with the ampere base unit explainer and the ISO 80000-6 guide to show auditors and teammates how current, voltage, and resistance stay linked to the SI definition.