Shower Water Usage Table: Water used by Shower flow rate
Reference table of water used for Shower Water Usage across a range of shower flow rate values — exact, engine-computed figures you can read off at a glance.
Shower Water Usage Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Water used
72.0
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Shower Water Usage Calculator
The Shower Water Usage Calculator works out your water used in an instant. Enter shower flow rate and shower length and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the shower flow rate.
- Enter the shower length.
- Read off your water used — the calculator updates automatically, with no button to press.
Formula
The Shower Water Usage Calculator uses the formula:
Water used = Shower flow rate × Shower length
Worked example
For example, with shower flow rate of 9 litres/min and shower length of 8 minutes, the water used is 72.0.
| Shower flow rate | 9 litres/min |
|---|---|
| Shower length | 8 minutes |
| Water used | 72.0 |
|---|
Results are estimates for educational use, not professional advice.
Frequently asked questions
Multiply the flow rate by the time. A 9 litre-per-minute shower for 8 minutes uses 72 litres.
Standard heads use about 9 to 12 litres per minute; low-flow heads can be 6 or less.
Fit a low-flow head, take shorter showers, and turn the water off while soaping.
A bath often uses 80 to 150 litres, so a short, efficient shower usually uses less.
The Shower Water Usage Calculator uses the formula: Water used = Shower flow rate × Shower length. For example, with shower flow rate of 9 litres/min and shower length of 8 minutes, the water used is 72.0.
Enter the shower flow rate. Enter the shower length. Read off your water used — the calculator updates automatically, with no button to press.
Related guides
How to Calculate Shower Water Usage: Formula, Steps & Examples
Learn how to calculate Shower Water Usage — the formula explained step by step, with worked examples and a free calculator to check your answer.