How this calculator helps
Shower duration and water flow rate are both important. Multiplying litres per minute by minutes and household usage gives an estimate of annual volume.
Before you decide
The result excludes the energy required to heat the water. It is also unsuitable for estimating unmetered bills, which are not charged solely by volume.
A practical example
At 9 litres per minute, an eight-minute shower uses approximately 72 litres. Your actual flow may differ. Some water suppliers quote combined water and wastewater charges per cubic metre.
Frequently asked question
Does a shorter shower always save the displayed amount?
No. Savings depend on your actual flow rate, tariff, number of showers and heating arrangement.
What next?
Change the figures and see the estimate update instantly. For another practical check, browse our free tools library or try the daily challenge.