Watt Calculator

Find out exactly how much power you need before buying a generator. Add your appliances and calculate the right generator size for your home, RV, camping, or emergency backup setup.

  • Calculate total wattage fast
  • Great for home, RV, and camping
  • Uses real appliance power data

Watt Calculator

Select what you want to power during an outage and estimate the generator or power station size you may need.

Add Custom Item

Your Estimated Power Need

Running Watts: 0 W

Highest Starting Surge: 0 W

Estimated Starting Watts Needed: 0 W

Recommended Generator Size: 0 W

Select items above to calculate your power needs.

Note: Wattage varies by appliance model. Always check the label or owner’s manual before buying a generator or power station.