Printable Generator Load Calculator
This worksheet is for anyone estimating standby generator size for a home or small property. It includes a circuit load calculator with columns for circuit or load, volts, running amps, LRA for motors, running kW, and surge kW above running. The rows are set up for loads that may run together, such as a refrigerator, furnace blower, or well pump.
Free printable · PDF
- 1 page
- US Letter — choose “Fit to page” for A4
- PDF, 54 KB
Free for personal, family and classroom use.
Enter each circuit you want on backup power, then fill in the running amps and motor LRA where known. The sheet adds the largest surge on top of the running total so you can compare the load against generator output before you buy or size equipment.
Good for
- List circuits for backup power planning
- Add motor starting surge to load totals
- Compare running load to generator output
Tip: Print one copy for each backup scenario so you can test different circuit combinations.
4 files · XLSX, PDF, DOCX
Get every sheet: Standby Generator Sizing Workbook
This sheet plus 3 more in one download, with the editable Excel and Word files. Excel circuit-by-circuit load calculator with motor surge, essential-circuit planner, installer quote comparison sheet and maintenance log.
$5.00 USD, one-time 4 files · about $1.25 each
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Printable Essential Circuit Planner
Generator Quote Comparison Sheet
Printable Generator Maintenance Log