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Home > Resource Conservation > Heat > Water Heaters > Water Heating Cost Calculator  

Resource Conservation: Heat: Water Heaters: Water Heating Cost Calculator

water heating
     This page is devoted to providing you with an easy way to calculate your costs to heat a gallon of water to a set temperature. This is for Gas and Electric water heaters. Tankless efficiencies will be more like .99 for electricity and 0.76 for gas.

 

Water Heat Cost Calculator

Useful information for calculators:

Temperature Map
This is a basic map of water temperatures across the nation. Click on it to see an average in your area (EPA Site).
Typical elements for Water heater (electric): 1,500 Watt, 2,000 Watt, 3,000 Watt, 3,800 Watt, 4,500 Watt and 5,500 Watt.

1 Therm is approx equal to 100 CCF of Gas.

Most water heaters are set to 120 deg F from the factory (but you can adjust them).

ELECTRICITY:
Water Inlet Temp (F) Hot Temp Setting (F)
Efficiency Factor (EF) Cost Per KWHR ($)
Results:
Shower Water (100 F) $/gal Warm Water Cycle (40% hot water) $/gal
Faucet Water (50% hot water) $/gal Dishwasher (100% hot water) $/gal

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GAS:
Water Inlet Temp (F) Hot Temp Setting (F)
Efficiency Factor (EF) Cost Per Therm ($)
Results:
Shower Water (100 F) $/gal Warm Water Cycle (40% hot water) $/gal
Faucet Water (50% hot water) $/gal Dishwasher (100% hot water) $/gal

See how we Make the calculations.