What is this calculator?
Calculate current and power from voltage and resistance.
What can you use it for?
Use it for practical planning, conversions, measurement or checking the result described here. Calculate current and power from voltage and resistance.
How to use it
- Enter voltage (v).
- Enter resistance (ω).
- Select Calculate (or Generate for random tools).
- Read the answer and any additional results below the form. Check the units and the limits of the method.
Formula and method
Power = voltage^2/resistance
The formula uses the units and definitions shown above. Each input is substituted before the arithmetic is evaluated; the calculated output is rounded for display.
Worked example
Voltage (V): 12, Resistance (Ω): 6. The result is 2 A (current).
Assumptions and limits
Use the units and formats shown in the input labels. Actual conditions and applicable standards may differ from this simplified calculation.
Frequently asked questions
What inputs does the Ohm’s Law Calculator need?
Use voltage (v), resistance (ω). Read the answer and any additional results below the form. Check the units and the limits of the method.
What assumptions apply to the Ohm’s Law Calculator?
Use the units and formats shown in the input labels. Actual conditions and applicable standards may differ from this simplified calculation.