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Generator Wattage Calculator

Need help? Tutorial and Glossary

Input the quantity of all the devices your generator will power then click Calculate Wattage.
The calculator will calculate the minimum required starting watts and running watts.

Appliances

Smart Devices
Item Running Watts Starting Watts Quantity
Smartphone
Tablet
WiFi Router
CPAP
Radio/Speaker
Drone
Laptop Computer
Television
Game Console
Desktop Computer
Satelite Receiver
Outdoor Adventure
Item Running Watts Starting Watts Quantity
Electric Cooler
Air Pump
Cabin lights
Water pump
Anchor winch
Bilge pump
15000BTU A/C
RV
Item Running Watts Starting Watts Quantity
Fan
Handheld Vacuum
RV Fridge
Slow Cooker
Coffee Maker
Microwave
Radiant Heater
Water Heater
Electric range (1 element)
11000BTU A/C
13000BTU A/C
15000BTU A/C
Essential Home Backup
Item Running Watts Starting Watts Quantity
Light bulb (LED)
Curling iron
Slow Cooker
Refrigerator
Deep freezer
Microwave oven
Coffeemaker
Sump pump
Air conditioner - Window
Portable electric heater
Electric range (1 element)
Whole Home Backup
Item Running Watts Starting Watts Quantity
Dishwasher
Garage door opener
Vacuum cleaner
Dehumidifier
Furnace fan
Washing machine
Hair dryer
Submersible pump (1HP)
Water heater
Air conditioner - Central
Clothes dryer (electric)
Event
Item Running Watts Starting Watts Quantity
String Lights
Box Fan
Small Appliances
Bouncy Castle Fan (1HP)
Event Speakers
Popcorn Machine
Jobsite
Item Running Watts Starting Watts Quantity
Drill Charger
Jigsaw
Orbital Sander
Small Air Compressor
Hand Drill
Angle Grinder
Impact wrench ½"
Belt sander
Chainsaw
Router
Chop Saw
Disk Sander
Agriculture
Item Running Watts Starting Watts Quantity
Chick brooder
Milk pump
Milking machine
Feed conveyor
Milk cooler
Silage unloader
Custom
Item Running Watts Starting Watts Quantity

*1) Appliances with starting or running watts above the rated wattage of the unit WILL NOT RUN.

2) Remember results are ONLY an estimate and will be affected by many real world factors.

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©2022 Energizer. Energizer, Energizer Bunny design and certain graphic designs are trademarks of Energizer Brands, LLC and related subsidiaries and are used under license by Midland Power Inc. All other brand names are trademarks of their respective owners. Neither Midland Power Inc. nor Energizer Brands is affiliated with the respective owners of their trademarks.