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Home Energy Costs and Emissions Calculator

Use this calculator to:

• Calculate the annual cost difference between natural gas and electricity
  at varying prices and efficiency factors
• Compare annual operating costs between standard- and high-efficiency equipment
• Compare the environmental impact of natural gas and electricity

Energy costs
Natural gas price per therm	$
Electricity price per kWh	$
Furnace
Select your home size	<2000 sq. ft. 2000-3000 sq. ft. 3000-4000 sq. ft. >4000 sq. ft.
Current furnace efficiency	70 % 80 % 92 % 94 %
Water heater
Number of showers per day	1 2 3 4 5
Minutes per shower	5 10 15 20 25 30
Automatic dishwasher loads per week	1 3 5 7
Hand-washed dish loads per week	0 2 4 6 8 10 12
Automatic laundry loads per week	0 1 2 4 6 8 10
Hand and face washes per day	1 2 5 10 15
Water heater efficiency	Standard (.54 EF) High-efficiency (.62 EF)
Clothes dryer
Number of laundry loads dried per week	1 2 4 6 8 10
Minutes you operate your dryer per load	10 20 30 40 50 60
Range
Stove top meals you prepare each day	1 2 4 6 8 10
Minutes you operate your stove top per meal	5 10 15 20 25 30