Wattage Worksheet

More wattage means more items powered at once.
1
Typical wattages listed are approximate only. Check tool or appliance for actual wattage. If connecting a generator into your home electrical system, have a licensed electrician install an Emergency Manual Power Transfer System.
Home
Running Watts
1
Starting Watts
1
Essentials
60 Watt Light Bulb 60 0
75 Watt Light Bulb 75 0
Refrigerator/Freezer 550 1350
Water Well Pump - 1/3 HP 575 1440
Sump Pump - 1/3 HP 1140 2850
Sump Pump - 1/2 HP 1200 3000
Electric Water Heater 3800 0
Kitchen
Microwave (625 Watts) 625 0
Microwave (1000 Watts) 1000 0
Coffee Maker 1300 0
Electric Stove 8" Element 2100 0
Family Room
Cell Phone Charger 6 0
Tablet 50 0
LCD TV - 32” 75 0
Laptop 250 250
Stereo Receiver 450 0
Plasma TV - 50” 500 0
Heating/Cooling
Space Heater 1500 0
Humidifier - 13 Gallon 175 0
Furnace Fan Blower - 1/3 HP 700 1400
Furnace Fan Blower - 1/2 HP 800 2350
Window AC - 10,000 BTU 1000 2100
Window AC - 12,000 BTU 3250 3950
Central AC - 10,000 BTU 1500 3000
Central AC - 24,000 BTU 3800 4950
Central AC - 40,000 BTU 6000 6700
Heat Pump 4700 4500
Example
Tool or Appliance Running Watts
1
Starting Watts
1
1. Refrigerator/Freezer 550 1350
2. Furnace Fan Blower 1/2 HP 800 2350
3. Sump Pump 1200 3000
4. Plasma TV – 50” 500 500
5. Lights (6 x 75 watts) 450 0
TOTAL RUNNING WATTS =
3500 2350
With this example you need a generator
that produces at least 3500 total running
watts and 6500 total starting watts.
3500
6500
Your Power Needs
Tool or Appliance Running Watts
1
Starting Watts
1
1.
2.
3.
4.
5.
6.
7.
8.
TOTAL RUNNING WATTS =
I need a generator that produces at
least ____________ total running watts
and ____________ total starting watts.
Work
Running Watts
1
Starting Watts
1
DIY
Quartz Halogen Work Light 1000/500/300 0
Cordless Tool Battery Charger 1000 0
Airless Sprayer - 1/3 HP 600 1200
Table Saw 1800 4500
Reciprocating Saw 1080 2700
Electric Drill 3/8", 4 Amps 480 1200
Electric Drill 1/2", 5.4 Amps 1100 1250
Hammer Drill 1600 1400
Circular Saw 7 1/4" 1800 2000
Miter Saw 10" 1800 4500
Air Compressor - 1/3 HP 300 780
Air Compressor - 1 HP 1400 3600
Play
Running Watts
1
Starting Watts
1
Tailgating/Camping
AM/FM Radio
10 0
Cell Phone Charger 6 0
CD/DVD Player 100 0
Box Fan - 20" 100 0
Inflator Pump 175 0
Slow Cooker 240 0
Light String 250 0
Portable Heater 625 1500
Portable Appliances
1500 1500
1
Select the items you wish to power at
the same time by filling in the check
boxes next to each item.
2
Add the running watts of the items you
wish to power in the your power needs
area at the bottom of the page.
3
Select the individual item with the highest
starting watts and add it to the total running
watts number, and enter the result into the total
starting watts box below.
This worksheet will focus on determining your running and starting watt needs. The size of generator you need
depends on your power requirements. Generally, a higher-wattage generator lets you power more items at once.
HIGHEST
ADDITIONAL
STARTING WATTS
HIGHEST
ADDITIONAL
STARTING WATTS
TOTAL
RUNNING
WAT TS
TOTAL
RUNNING
WAT TS
TOTAL
STARTING
WAT TS
TOTAL
STARTING
WAT TS
Portable Generators
+ +
= =
EXAMPLE