Generator Sizing Calculator
Estimate generator wattage needed for home or job site
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How to Use This Calculator
Running Watts.
Surge Watts.
Get Size.
Understanding Generator Sizing Calculations
Starting current.
Running load.
Fuel type.
Transfer switch.
Formula & Calculations
Sum(Running) + Max(Surge)
Key Factors to Consider
Fuel (Gas/Propane)
Noise
Run time
THD (Electronics)
Frequently Asked Questions
1Whole house?
15kW - 22kW typically.