Free Resistance Calculator
Calculate electrical resistance from voltage and current using R = V / I.
V
A
Resistance
24.0000 Ω
Resistance vs Voltage
Resistance
Resistance measures how strongly a component opposes the flow of electric current.
Formula
R = V / I
Derived from Ohm's law. The unit is the ohm (Ω), named after Georg Ohm.
Example Calculation
A 12 V battery drives 0.5 A through a resistor.
- 01R = V / I
- 02R = 12 / 0.5
- 03R = 24 Ω
Frequently Asked Questions
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