Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Engineering
Ohm's Law Calculator
Calculate electrical resistance from voltage and current using Ohm's Law: R = V / I. Use it for circuit analysis, troubleshooting electronic circuits, or sizing resistors and conductors in DC and AC (resistive) systems.
Fill in the required fields to see your result.
Electrical
Wire Gauge Calculator
Determines the minimum copper wire gauge (AWG) needed to limit voltage drop in an electrical run. Ideal for electricians, solar installers, and DIYers sizing cables for long runs.
Fill in the required fields to see your result.
Key differences
| Ohm's Law Calculator | Wire Gauge Calculator | |
|---|---|---|
| Category | Engineering | Electrical |
| Inputs required | 2 | 3 |
| Result | Resistance (Ω) | Required Wire Gauge (AWG) |
| What it does | Calculate electrical resistance from voltage and current using Ohm's Law: R = V / I. Use it for circuit analysis, troubleshooting electronic circuits, or sizing resistors and conductors in DC and AC (resistive) systems. | Determines the minimum copper wire gauge (AWG) needed to limit voltage drop in an electrical run. Ideal for electricians, solar installers, and DIYers sizing cables for long runs. |