Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Electrical Home
Battery Backup Runtime Calculator
Estimate how many hours a battery backup system will run your devices during a power outage. Essential for sizing UPS systems, solar storage, and off-grid setups.
Fill in the required fields to see your result.
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.
Key differences
| Battery Backup Runtime Calculator | Circuit Breaker Sizing Calculator | |
|---|---|---|
| Category | Electrical Home | Electrical Home |
| Inputs required | 5 | 3 |
| Result | Backup Runtime (hours) | Required Breaker Size (amps) |
| What it does | Estimate how many hours a battery backup system will run your devices during a power outage. Essential for sizing UPS systems, solar storage, and off-grid setups. | 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. |