๐ Household
Water Usage Calculator
Indoor water use in a typical home splits roughly into toilets, showers, faucets, laundry and leaks. Fixture flow rates are the biggest lever: swapping a 2.5 gallon-per-minute showerhead for a 1.8 cuts shower water by nearly a third.
How it works
People in the household
Showers per person per week
Minutes per shower
Showerhead flow rate
Toilet flushes per person per day
Gallons per flush
Laundry loads per week
Outdoor water per week
Water rate
Daily household use
Monthly household use
Monthly water cost
Yearly water cost
Gallons per person per day
Frequently asked questions
How do I use the Water Usage Calculator?
Fill in the fields above โ the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.