Voltage Calculator
What voltage produces this current through a resistor. Enter the quantities below to calculate the result.
Reference calculation or estimate for example inputs; assumptions and limitations apply.
Calculations run in your browser.
What to enter
| Input | Meaning and units |
|---|---|
| DC current (A) | Enter dc current in A; use the same basis as the other measurements. |
| Resistance (Ω) | Enter resistance in Ω; use the same basis as the other measurements. |
Understanding your result
Read Voltage (V), Resistor power (W) in the units and model stated on this page. The formula voltage=current*resistance · power=current^2*resistance defines the relationship; measurement accuracy and model applicability are separate from numerical precision.
Common mistakes
- Mixing input units or changing the physical meaning of a variable without changing the model.
Check your calculation
- Use the worked example as a known reference case, then change one input at a time and check the direction and units of the response.
Calculation checks, sources and review limits
What voltage produces this current through a resistor?
What voltage produces this current through a resistor. Enter the quantities below to calculate the result.
Common uses
- What voltage produces this current through a resistor
How it works
Use Ohm’s law V = I × R and DC resistor power I²R.
Worked example
Enter DC current: 2 A; Resistance: 6 Ω. Results: Voltage: 12 V; Resistor power: 24 W.