CalculatorCritical
Shower Water Usage Calculator
For consumers, students & professionals. Result, assumptions, chart, comparisons and recommendations.
Unit system— all inputs and outputs convert automatically
Inputs
Enter your data — results update live.
Shower water use
72
L/day
Notes
- • A 6 L/min low-flow head cuts water & heating energy by ~33%.
Breakdown chart
Visual comparison of each component (L).
- Per shower
- 72.00 L
- Per week
- 504.00 L
- Per year
- 26280.00 L
- Water-heating energy
- 2.33 kWh/day
- Annual heating cost @ $0.16/kWh
- 136.00 $
Methodology & sources
Formula
Litres = duration × flow × showers/day; Energy = m·c·ΔT / ηSources
- • US EPA WaterSense
- • DOE Water Heating Guide