Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Electrical Home
Circuit Breaker Size Calculator
Determine the correctly rated circuit breaker amperage for any electrical circuit based on total wattage and voltage. Essential for panel upgrades, new circuit installations, and NEC code compliance.
Fill in the required fields to see your result.
Electrical Home
Circuit Breaker Size Calculator
Determine the correctly sized circuit breaker for any electrical load, accounting for continuous versus non-continuous use, ambient temperature, and safety margins. Use it before wiring a new circuit or replacing a breaker.
Fill in the required fields to see your result.
Key differences
| Circuit Breaker Size Calculator | Circuit Breaker Size Calculator | |
|---|---|---|
| Category | Electrical Home | Electrical Home |
| Inputs required | 2 | 4 |
| Result | Circuit Breaker Size (amps) | Minimum Breaker Size (amps) |
| What it does | Determine the correctly rated circuit breaker amperage for any electrical circuit based on total wattage and voltage. Essential for panel upgrades, new circuit installations, and NEC code compliance. | Determine the correctly sized circuit breaker for any electrical load, accounting for continuous versus non-continuous use, ambient temperature, and safety margins. Use it before wiring a new circuit or replacing a breaker. |