Ohms Law Calculator
Ohms Law Calculator lets you ohm’s law gives current I = V/R and resistive power P = V²/R. Enter your own values or load the worked example.
- Copy or download the computed result
- Adjust voltage (v)
- See the processing method and limits
Method and calculation
Ohm’s law gives current I = V/R and resistive power P = V²/R.
Inputs and settings
Ohms Law Calculator accepts Voltage (V) (minimum 0.000001); Resistance (Ω) (minimum 0.000001).
Worked example
Ohms Law Calculator example — Voltage (V): 12; Resistance (Ω): 100. Computed output: { "amperes": 0.12, "watts": 1.44 }
Output and limitations
Ohms Law Calculator: Use finite inputs. Results use double-precision arithmetic.
Technical references: JavaScript numerical operations
Ohms Law Calculator FAQs
Ohms Law Calculator applies the following rule to your input: Ohm’s law gives current I = V/R and resistive power P = V²/R. The worked example on this page uses the same processor as the result button.
Ohms Law Calculator has these boundaries: Use finite inputs. Results use double-precision arithmetic. Start by checking the voltage (v) field against the units or format shown.
Ohms Law Calculator provides this sample: { "amperes": 0.12, "watts": 1.44 }. Use the sample button to reproduce it, then replace the inputs with your own values.