Shower water & energy
Enter your numbers — the results update instantly.
Water per year32.76 m³
Energy per year952.32 kWh
Worked example
Given: Shower length = 10 min; Flow (L/min) = 9; Showers per week = 7; Water heated by (°C) = 25
Result: Water per year = 32.76 m³; Energy per year = 952.32 kWh
How it is calculated
1. Enter the values you know. 2. The calculator converts them to base units and applies the formula. 3. The result is shown in the unit you choose.
Frequently asked questions
How do I calculate it?
Given: Shower length = 10 min; Flow (L/min) = 9; Showers per week = 7; Water heated by (°C) = 25. Result: Water per year = 32.76 m³; Energy per year = 952.32 kWh.
Is the calculator free and private?
Yes. It is free, needs no sign-up and runs in your browser — the numbers you type stay on your device.