Calculate generator size needed for your power requirements.
Appliances to Power
Common Values
Capacity Required
Recommended Size
4100W
(includes 20% safety margin)
Total Running1850W
Max Starting3350W
Safety Insight
Your peak demand is 3350W. A 4100W generator ensures you can handle starting surges without tripping breakers.
About this calculator
Overview
Generator sizing ensures adequate power for appliances and tools. Running watts = continuous power; starting watts = surge power for motors. Undersized generators can damage equipment.
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Pro Tips
Motors need 2-3× running watts for startup.
Add 20% safety margin to total wattage.
Prioritize essential circuits for backup power.
Transfer switch required for whole-house backup.
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Fun Facts
Formula: Total Watts = Σ(Running Watts) + Highest Starting Surge
