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Both calculators run independently β change the inputs on either side to compare results.
Electrical Home
Circuit Breaker Sizing Calculator
Determine the correct circuit breaker amperage for any electrical circuit using NEC load classification rules. Use it when designing new circuits or upgrading panels for continuous, non-continuous, and motor loads.
Fill in the required fields to see your result.
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.
Key differences
| Circuit Breaker Sizing Calculator | Circuit Breaker Size Calculator | |
|---|---|---|
| Category | Electrical Home | Electrical Home |
| Inputs required | 3 | 2 |
| Result | Required Breaker Size (amps) | Circuit Breaker Size (amps) |
| What it does | Determine the correct circuit breaker amperage for any electrical circuit using NEC load classification rules. Use it when designing new circuits or upgrading panels for continuous, non-continuous, and motor loads. | 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. |