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Wattage Requirement Calculator

Fill in the boxes as shown below.

Check Items: Mark the items you want to power by clicking in the check box next to each item.
Mark Quantity: If there is more then one unit of an item, type the number into the Quantity Box.
Volts: Select the voltage used for each item. To set all the items in the group to same voltage, use Set all at the top of the column.
Phase: Select the phase used for each item. To set all the items in the group to same phase, use Set all at the top of the column.
Running Amps: If you know the running amps, and it is different than the "typical" value type the number in the box. Watts running and starting will be calculated based on the voltage you selected.
Running Wattage: If you do not know the actual running and watts leave the "Specific" box blank and the "Typical Wattage" will be used. If you do know the specific wattage type the wattage into the "Specific" box for that item.
Starting Wattage: If you do not know the actual starting and watts leave the "Specific" box blank and the "Typical Wattage" will be used. If you do know the specific wattage type the wattage into the "Specific" box for that item. Starting wattage must be equal to or larger than running amperage or will be ignored.
kW / kVA: This is the minimum size of the generator for this item. Totals are shown at the bottom of the page.
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Household & Office + Contractor + Industrial Motors + Motor Power Calculator
 
 Household & Office  Volts Phase Run Amps
(If known)		 Running Wattage Starting Wattage kW / kVA
Set All Set All Calc Watts Typical Specific Typical Specific
Air Conditioner, Central, BTU 1400 2200  
Air Conditioner, Central, BTU 2500 3300  
Air Conditioner, Central, BTU 3800 4950  
Air Conditioner, Window, 8,000 BTU 1200 2160  
Blanket, Electric 400 0  
Blender 200 0  
Bread Maker 600 2300  
Broiler 1350 0  
Broom , Electric 500 0  
CD player & Speaker 100 0  
Clothes Dryer, Gas 650 720  
Clothes Dryer, Electric 750 1800  
Coffee Maker 550 1000  
Computer & Monitor 720 0  
Computer & Large Monitor 900 0  
Computer Network Equipment 100 0  
Computer Printer Inkjet 350 0  
Computer Printer Laser 720 0  
Computer UPS , Personal 500 850  
Computer UPS , Large 3000 6500  
Converter 600 0  
Copy Machine 1600 0  
Dehumidifier 650 800  
Dishwasher, Cool Dry 700 1400  
Dishwasher, Hot Dry 1450 1400  
Freezer 700 2200  
Fry Pan, Electric 1300 0  
Furnace Fan, gas or fuel, 1/8 HP 300 500  
Furnace Fan, gas or fuel, 1/6 HP 500 750  
Furnace Fan, gas or fuel, 1/4 HP 600 1000  
Furnace Fan, gas or fuel, 1/3 HP 700 1400  
Furnace Fan, gas or fuel, 1/2 HP 875 2350  
Garage Door Opener, 1/4 HP 550 1100  
Garage Door Opener, 1/3 HP 725 1400  
Hair Dryer 900 0  
Heat Pump 4800 10800  
Hot Tub Heater 1700 1700  
Hot Tub Pump 800 950  
Iron 1000 0  
Lights, Incandescent 100 0  
Lights, Fluorescent 90 125  
Lights, Flood 500 0  
Lights, Low Voltage 25 0  
Microwave Oven 625 800  
Range, Electric, 6-inch elements 1500 0  
Range, Electric, 8-inch elements 2100 0  
Refrigerator 700 2200  
Slow Cooker 130 0  
Toaster, 2-slice 1050 0  
Toaster, 4-slice 1650 0  
Other Appliances or Devices, 1      
Other Appliances or Devices, 2      
Other Appliances or Devices, 3      
Oven 3410 0  
Radio or Stereo 350 0  
Pump, Sump, 1/3 HP 800 1300  
Pump, Sump, 1/2 HP 1050 2150  
Pump, Well, 1/3 HP 750 1500  
Pump, Well, 1/2 HP 900 2000  
Pump, Well, 3/4 HP 15000 3000  
Pump, Well, 1 HP 2000 4000  
Pump, Well, 1 - 1/2 HP 2500 5000  
Pump, Well, 2 HP 3750 7500  
Pump, Well, 3 HP 5000 10000  
Pump, Well, 5 HP 7500 15000  
Pump, Well, 7 - 1/2 HP 10000 20000  
Pump, Well, 10 HP 15000 30000  
Radio 200 0  
Security System (Alarm Panel) 200 0  
Sewing Machine 200 0  
Space Heater 800 0  
Television, Color 300 0  
Toaster 900 0  
VCR 200 0  
Vacuum Cleaner, Standard 800 0  
Vacuum Cleaner, Heavy Duty 1100 0  
Washer & Dryer 2000 3000  
Water Heater, Electric 2000 3000  
Household Totals            
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 Contractor Volts Phase Run Amps
(If known)		 Running Wattage Starting Wattage kW / kVA
Set All Set All Calc Watts Typical Specific Typical Specific
Air Compressor, 1/2 HP 1000 2000  
Air Compressor, 1 HP 1500 4500  
Air Compressor, 1-1/2 HP 2200 6000  
Air Compressor, 2 HP 2800 7700  
Battery Charger 3000 0  
Chainsaw, Electric, 12 ", 1/2 HP 900 0  
Chainsaw, Electric, 14 ", 2 HP 1100 0  
Cultivator, Electric, 1/3 HP 7000 1400  
Drills, 1/4 inch 3 amps 300 400  
Drills, 3/8 inch 4 amps 440 600  
Drills, 1/2 inch 5.4 amps 600 900  
Floor Polisher, 16 ", 3/4 HP 1400 3100  
Floor Polisher, 20 ", 1 HP 1600 4500  
Grinder, Bench, 6 " 720 1000  
Grinder, Bench, 8 " 1400 2500  
Grinder, Bench, 10 " 1600 3600  
Hammer, Demolition 1900 3300  
Hedge Trimmer, Electric, 18 " 400 0  
Impact Wrench 1/2 " 750 1200  
Impact Wrench 3/4 " 950 1400  
Impact Wrench 1 " 1400 2400  
Lights, Flood 1500 0  
Mixer, Drum, 55 gallons, 1/4 HP 700 1200  
Other Tools, 1      
Other Tools, 2      
Other Tools, 3      
Pump, Submersible, 400 GPH 200 400  
Pump, Submersible Centrifugal, 900 GPH 500 400  
Saw, Band, 14 " 1100 1400  
Saw, Circular, Heavy-duty, 6 1/2 " 800 1200  
Saw, Circular, Heavy-duty, 7 1/4 " 1400 2300  
Saw, Circular, Heavy-duty, 8 1/4 " 1800 3000  
Saw, Miter, 10 amp 1100 2000  
Saw, Miter, 15 amp 1650 3000  
Saw, Saws All, Heavy-duty 750 1400  
Saw, Table and Radial, 9 " 1500 3000  
Saw, Table and Radial, 10 " 1800 4500  
Saw, Worm Drive, 7 1/4" (Skill Saw) 1800 2600  
Trimmer, Electric, Standard, 9" 350 0  
Trimmer, Electric, Heavy-duty, 12" 500 0  
Vacuum, Wet and Dry, 1.7 HP 900 0  
Vacuum, Wet and Dry, 2 1/2 HP 1300 0  
Washer, High-pressure,  5/8 HP 900 2700  
Washer, High-pressure, 1 HP 1200 3600  
Washer, High-pressure, 1-1/2 HP 1450 4300  
Washer, High-pressure, 3 HP 3125 9300  
Contractor Totals            
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 Industrial Motors Volts Phase Run Amps
(If known)		 Running Wattage Starting Wattage kW / kVA
Set All Set All Calc Watts Typical Specific Typical Specific
Capacitor Start Induction Motors, 1/3 HP 720 1300  
Capacitor Start Induction Motors, 1/2 HP 975 2100  
Capacitor Start Induction Motors, 3/4 HP 1400 3100  
Capacitor Start Induction Motors, 1 HP 1600 4500  
Capacitor Start Induction Motors, 1-1/2 HP 2200 6000  
Capacitor Start Induction Motors, 2 HP 2850 7700  
Capacitor Start Induction Motors, 3 HP 3900 12,000  
Capacitor Start Induction Motors, 5 HP 6800 16,500  
Fan Duty Motors, 1/8 HP 400 600  
Fan Duty Motors, 1/6 HP 550 850  
Fan Duty Motors, 1/4 HP 650 1200  
Fan Duty Motors, 1/2 HP 800 1600  
Fan Duty Motors, 3/4 HP 1100 2400  
Household & Office, Single Phase            
Household & Office, Three Phase            
Household & Office TOTAL            
             
Contractor, Single Phase            
Contractor, Three Phase            
Contractor TOTAL            
             
Industrial Motors, Single Phase            
Industrial Motors, Three Phase            
Industrial Motors TOTAL            
             
TOTAL, Single Phase            
TOTAL, Three Phase            
TOTAL            
 
Maximum Rating Required            
Minimum Rating Required            
             

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