Free Shipping On Electric Generators (Lower 48) Tax-Free Except Illinois Orders

Home Standby Generator Calculator

Easily Size Your Home Standby Generator

By 
 | 
Generator Product Expert

Did you know the most important factor when shopping for a standby generator is making sure you get the right size? If the thought of calculating the wattage of each electrical appliance in your home makes you nervous, you’re not alone.

Electric Generators Direct put together this easy-to-use Standby Generator Sizing Calculator. Simply fill out the details of your home and the wizard will do the work for you by suggesting generators that meet your needs. To determine your home’s exact power requirements, we suggest contacting a certified electrician.
 
Need More Help Choosing a Home Standby Generator? Call Us at (800) 800 - 3317 for Assistance.

Step 1: Home Details - What is the Size of your Home?

Step 2: Central Air Conditioner Size

AC units come in several sizes depending on their BTUs or Tons. Since central air conditioners typically use more wattage than any other appliance in your home, you will want to make sure you get a generator that can handle the load.

Step 3: What Do You Want To Power?

Choose what your power needs are clicking below. Select whole house if you want everything to run at the same time during a power outage or customize to.
Whole House
Customize

Whole House

Selecting whole house provides a backup generator recommendation based on your home's size and corresponding outlets and lighting requirements and assumes natural gas appliances in the baseline calculation. If your home has electric appliances like an electric range, electric clothes dryer, electric water heater, etc., you can add these items below to accurately reflect your home's specific backup power needs.

Customize

Use this option if you want an emergency back-up generator without powering your entire home. Be sure to select each electrical appliance you wish to have backup power for in your home below.
Essentials
+
1
+
Central AC
1
+
AC Tonnage 1
1
+
AC Tonnage 2
0
+
Window AC
0
+
Well Pump
0
+
Electric Water Heater
0
+
Gas Water Heater
0
+
Gas Furnace
1
+
Refrigerator
1
+
Freezer
0
+
Sump Pump
Appliances
+
0
+
Electric Oven/Stove
0
+
Gas Oven/Stove
1
+
Microwave
1
+
Dishwasher
1
+
Garage Door
0
+
Electric Dryer
Extras
+
0
+
Computer
0
+
Wi-Fi
0
+
Hot Tub
0
+
Sauna
0
+
Pool
0
+
Security
Lightings and Outlets
+
0
+
Master Bedroom
0
+
Bedroom
0
+
Office
0
+
Living Room
0
+
Dining Room
0
+
Family Room
0
+
Kitchen
0
+
Kitchen Outlets
0
+
Hall/Stairs
0
+
Bathroom
0
+
Basement
0
+
Laundry Lights
Appliances
+
0
+
Refrigerator
0
+
Electric Dryer
0
+
Electric Oven/Stove
0
+
Electric Cooktop
0
+
Garbage Disposal
0
+
Freezer
0
+
Electric Water Heater
0
+
Garage Door
0
+
Microwave
0
+
Dishwasher
0
+
Washer w/Gas Dryer
Extras
+
0
+
Gas Furnace
0
+
Boiler
0
+
Window AC
0
+
Heat Pump
0
+
Sump Pump

Don't see an item you need? Add Your Own

+
Add Item
See Suggested Standbys

Recommended Models

View All Results
E-mail Me
* PED Sizing Tool assumes that you will use load management and not run all appliances at the same time.
We recommend having an licensed electrician verify your specific electrical requirements before purchasing.
Learn More about Home Standby Generators
This sizing tool is intended for estimating purposes only. This tool assumes that you will use load management and will not run all appliances at the same time. Transfer switches should be sized to your particular application. We recommend having an licensed electrician or certified installer verify your specific electrical requirements before purchasing. All installations must be performed by a certified electrician in accordance with local codes to maintain manufacturer warranties. Call Our Experts: 800-800-3317
Standby Generator Options
Your Selections

 
 
Sign Up
Receive Weekly How-To Tips & Specials
Home Standby Generator Sizing Calculator - Need help sizing a home standby generator? Check out our easy to use standby generator sizing tool. Choose from list of items in your home that you would like to power during an outage and our standby generator sizing wizard will do the work for you by suggesting generators that may meet your needs. This tool is an approximation and we recommend talking to a licensed electrician before purchasing to ensure the generator you choose meets your specific electrician requirements.