Ohm's Law Voltage
Use Ohm's law to calculate voltage from current and resistance.
How to use
- Enter current I in amperes.
- Enter resistance R in ohms and calculate.
Capabilities and scope
For a simple resistive condition, voltage is the product of entered current and resistance.
How it works
It uses V=I×R.
Example
I=2 A and R=5 Ω give V=10 V.
Useful for
- Find voltage across a resistor
- Check a basic circuit calculation
Before you use it
- Nonlinear devices, AC impedance, and temperature-dependent resistance are outside this simple model.
Frequently asked questions
Can I use it directly for AC circuits?
Only for purely resistive magnitude cases; general AC analysis requires impedance and phase.