Generator Size & Cost Calculator
Find out exactly what size generator you need and how much it will cost — based on your actual appliances, not just your square footage.
Takes about 2 minutes. No signup required.
Tell us about your home
2,000 sq ft
8006,000
How this calculator works
Our calculator adds up the running and starting wattages of every appliance you select, applies a 25% safety margin, then matches you to the smallest generator that can handle your peak load. Costs are adjusted based on your state's average labor rates and permitting fees.
Want to understand the math? Read our generator sizing guide →