Shower Water Usage Calculator
Shower Water Usage Calculator: See Where the Water Goes
Shower length is one of the biggest levers in household water use, and it's easy to underestimate how much a longer shower adds up to over a week. This calculator converts your shower duration and showerhead flow rate into actual liters used.
The Formula
Liters per Shower = Shower Minutes × Flow Rate, Liters per Week = Liters per Shower × Showers per Week
Worked Example
An 8-minute shower with a 9.5 L/min low-flow showerhead, showering 7 times a week.
Liters per Shower = 8 × 9.5 = 76 L, Liters per Week = 76 × 7 = 532 L
How to Use This Calculator
- Enter your typical shower duration in minutes.
- Optionally adjust your showerhead's flow rate (9.5 L/min is a common low-flow standard).
- Enter your showers per week.
- Click Calculate to get water usage per shower and per week.
Related Calculations
Compare against the Water Usage Calculator for a full-household water consumption view.