Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Electrical
Electrical Power Calculator
Calculates electrical power in watts from voltage and current using P = V × I. Used by electricians, engineers, and DIYers to size fuses, cables, power supplies, and estimate appliance energy use.
Fill in the required fields to see your result.
Electrical
Ohm's Law Calculator
Solves for voltage, current, or resistance in a resistive circuit using V = I × R. Essential for electronics hobbyists, electricians, and students designing or troubleshooting DC and AC circuits.
Fill in the required fields to see your result.
Key differences
| Electrical Power Calculator | Ohm's Law Calculator | |
|---|---|---|
| Category | Electrical | Electrical |
| Inputs required | 2 | 2 |
| Result | Power (W) | Resistance (Ω) |
| What it does | Calculates electrical power in watts from voltage and current using P = V × I. Used by electricians, engineers, and DIYers to size fuses, cables, power supplies, and estimate appliance energy use. | Solves for voltage, current, or resistance in a resistive circuit using V = I × R. Essential for electronics hobbyists, electricians, and students designing or troubleshooting DC and AC circuits. |