Residential Generator Load Calculator

This calculator is based on NEC 220.82 residential service load calculations.

Calculated load can be used to size a home generator.
In the chart below insert the appliance watts
Small Appliance circuits are separate individual circuits for appliances like a Microwave. This item can account for appliances not in the list.
Conditions: Single family dwelling, air-conditioning load is larger than heating load.

Enter appliance wattages below to estimate the required generator size.

General Loads

Home Square Footage Small Appliance Circuits Laundry Circuits Range Cooktop Oven Electric Water Heater Electric Dryer Dishwasher Disposal Pool Pump Pool Air Blower Lawn Pump Microwave Garage Door Opener Refrigerator 1 Refrigerator 2 Freezer Additional Load #1 Additional Load #2

HVAC Loads

Air Conditioning Load Furnace / Air Handler

Residential Generator Load Calculator

General Loads

HVAC Loads

Calculation Results

Recommended Generator Size