Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Physics
Electric Circuit Power Calculator
Calculates electrical power in a circuit using voltage, current, and resistance. Use it to verify power dissipation in resistors, size fuses, or check component ratings in both series and parallel configurations.
Fill in the required fields to see your result.
Physics
Ohm's Law and Power Calculator
Instantly calculate electrical power three ways — P = V·I, P = V²/R, and P = I²·R — using Ohm's Law. Use it to verify circuit designs, select resistors, or compare power expressions.
Fill in the required fields to see your result.
Key differences
| Electric Circuit Power Calculator | Ohm's Law and Power Calculator | |
|---|---|---|
| Category | Physics | Physics |
| Inputs required | 4 | 4 |
| Result | Total Power (W) | Result (units) |
| What it does | Calculates electrical power in a circuit using voltage, current, and resistance. Use it to verify power dissipation in resistors, size fuses, or check component ratings in both series and parallel configurations. | Instantly calculate electrical power three ways — P = V·I, P = V²/R, and P = I²·R — using Ohm's Law. Use it to verify circuit designs, select resistors, or compare power expressions. |