±Free
Ohm’s law
Solve voltage, current or resistance for an ideal DC resistor.
Select voltage, current or resistance as the unknown. The tool multiplies or divides according to V = IR and returns the chosen value in volts, amperes or ohms.
How to use
- Enter your text, values, or image.
- Adjust the options and run the tool.
- Copy or download your result.
Worked example
Example input
Solve for: voltage Voltage (V): 12 Current (A): 2 Resistance (Ω): 6
Example result
{
"volts": 12
}Limitations and details
Models a passive ideal DC resistor with positive resistance; it does not calculate AC impedance or nonlinear component behavior.
Inputs and options
- Solve for
- Voltage / Current / Resistance
- Voltage (V)
- Number
- Current (A)
- Number
- Resistance (Ω)
- Number
Frequently asked questions
Is this tool free and private?
Yes. All 300 tools are free in this phase. Processing happens in your browser; your input and files are not sent to our servers.