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Hot Water Calculator
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Hot Water Usage Calculator

Enter the number of times per week each event occurs in your household.


long showers minutes liter/minute flow
short showers minutes liter/minute flow
running water minutes liter/minute flow
baths liters
wash basin use liters
kitchen sink used liters
dishwasher loads liters
loads of laundry liters
other activity liters

Weekly hot water usage: liters
Average hot water usage liters/day

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The above javascript tool can be used to help estimate your daily household hot water usage.

Notes:

  • 1 US Gallon is approximately 4 liters.
  • Low-flow shower heads typically have flow rates marked on them.  If your shower head does not have the flow rate marked you can likely use the default rate provided by the form.
  • running water can be used to track hot water used while shaving, to rinse suds off of dishes, etc.
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