Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Electrical Home
Home Generator Size Calculator
Find the minimum wattage generator needed to power your essential home appliances during an outage. Accounts for motor startup surges that can trip or damage undersized generators.
Fill in the required fields to see your result.
Electrical Home
Electrical Box Fill Calculator
Calculate how many additional wires fit in an electrical junction box after accounting for installed devices. Critical for NEC compliance when adding wires or devices to an existing box.
Fill in the required fields to see your result.
Key differences
| Home Generator Size Calculator | Electrical Box Fill Calculator | |
|---|---|---|
| Category | Electrical Home | Electrical Home |
| Inputs required | 2 | 3 |
| Result | Generator Size Needed (watts) | Maximum Wire Connections (wires) |
| What it does | Find the minimum wattage generator needed to power your essential home appliances during an outage. Accounts for motor startup surges that can trip or damage undersized generators. | Calculate how many additional wires fit in an electrical junction box after accounting for installed devices. Critical for NEC compliance when adding wires or devices to an existing box. |