RV Portable Generator Sizing & Wattage Calculator

What do you want to power?

This tool will focus on determining your running and starting watt needs. The size of the generator you need depends on your power requirements. Generally, a higher-wattage generator lets you power more items at once. Follow the steps below to help you determine how powerful your portable generator should be.

  1. Fill in the quantity, running watts and starting watts of the items you wish to power at the same time.
  2. Press "CALCULATE" button.

Note: The below are estimates only. Check your tool or appliance for exact wattage requirements. The wattages listed in our tool are based on estimated wattage requirements. For exact wattages, check the data plate or owner’s manual on the item you wish to power

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HVAC
Air conditioner

Space Heater

Portable Fan

Range Hood

Humidifier

Dehumidifier
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Kitchen
Dishwasher

RV Fridge

Induction Cooktop

Coffee Maker

Microwave

instapot

slow-cooker

blender

Electric Kettle

Electric Griddler

Toaster

Toaster Oven

Hot Plate

Bread Maker

Electric Skillet

Portable Ice Maker

Air Fryer
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Entertainment & Technology
DVD Player

TV

Satellite Receiver

Gaming Console

Radio

RV Speaker

Stereo

Printer

Desktop Computer

Laptop

Monitor

Charger
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Laundry & Personal
Washing Machine

Dryer

Iron

Hair Dryer

Elecrtic Blanket

Shaver

Vacuum

Icons made by Freepik from www.flaticon.com

Your power needs

Please consider the output of this program to be an approximation.

Frequently asked questions

What is the difference between running watts and starting watts?

Running, or rated watts are the continuous watts needed to keep items running. Starting watts are extra watts needed for two to three seconds to start motor-driven products like a refrigerator or circular saw, this is the maximum wattage the generator can produce.

What if I can’t determine the running or the startingwatt requirement for a tool or appliance?

If the running watts are not on the tool or appliance, you may estimate using the following equation: WATTS=VOLTS x AMPS. Only motordriven items will require starting watts. The starting watts required may be estimated at 1-2x the running/rated watts.

Why is only one starting watt item used to calculate your total starting watt requirement?

Unlike running watts, starting watts are only needed during the first few seconds of operation. In most cases, only one item will start or cycle at the same time, therefore this is the most accurate estimate.

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