Generator Sizing Calculator
Add Appliance
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Refrigerator (600W running, 1800W surge)
Freezer (500W running, 1500W surge)
Sump Pump (800W running, 2000W surge)
Well Pump (1000W running, 3000W surge)
Furnace Fan (800W running, 1600W surge)
Window AC (1200W running, 3600W surge)
Central AC (3500W running, 10500W surge)
Microwave (1000W running, 1500W surge)
Electric Range (2500W running, 5000W surge)
TV (150W running, 150W surge)
Computer (300W running, 300W surge)
Lights (300W running, 300W surge)
Running Watts
Surge Watts
Add Appliance
Please select an appliance or enter valid wattages.
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Results
Total Running Watts:
0
W
Highest Surge Watts:
0
W
Minimum Generator Size:
0
kVA
Formula: Generator Size (kVA) = max(Total Running Watts, Highest Surge Watts) / 1000 (assuming unity power factor). For safety, add 20% margin:
0
kVA.
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