If you have an old toilet, most probably it is using high amounts of water.

- How much water does a toilet use -

If you want to know how much water your toilet is using, you just need to take some simple steps.

Dual Flushing Toilet water consumption

– First make sure that nobody else is using water at home (e.g. tap water, washing machine,…)

– Take note of the value on your meter

– Flush the toilet

– Take note again of the new value on your water meter

– Substract the values

If you need more information about what a water meter is or how to read a water meter, have a look to this post or the video below.

How to read a water meter

Water usage and cost calculator

Once you know your toilet’s water consumption per flush, you can estimate the daily water usage based on how often the toilet is being used. 

After you have found out your toilet’s daily water usage, you can use the calculator below to estimate the water usage and water cost over a year.

You just need to adjust the values in the PARAMETERS section to your requirements and the calculator will automatically display the RESULTS section.


We know that not everyone uses litres so if you are from the US or UK you can have a look to our water consumption calculators page for calculators that will convert litres to your water units.

Convert liters to US gallons


Convert liters to UK gallons


A few other examples from our Water usage calculators page:

Dishwasher electricity usage calculator
Water tap water usage calculator
Water tap
Shower head water usage calculator
Shower head
Toilet water usage calculator

Additional information

If you are interested on learning how to reduce your bathroom’s water consumption, have a look this post and this other video on how to reduce your shower’s water consumption by installing a flow reduction valve.

How to install a flow regulation valve

All our videos can be found in YouTube, in both English and Spanish languages.

Additionally, you may want to have a look the the post where we review what is more efficient, if washing the dishes by hand or using the dishwasher.

Dishwasher electricity and water usage

Water conservation - Save and conserve water

Water conservation can be defined as the decision and the act of using less water 

Water conservation both benefit you and the environment 

The act of saving and conserving water does benefit you because you will be paying less on your water bills. 

And it also does benefit the environment because conserving water prevents any unnecessary waste of natural resources.

Now, at individual level it may not look worth to try to save a few litres or gallons here or there. 

Still, every little counts and if hundreds or thousands of us do save a little every time, it will make an important contribution towards conserving our natural resources.


For example, if 9000 households would manage to save as little as 5 litres of water per day:

> Collectively, we would be saving over 16,000,000 litres of water per year!

> Collectively, assuming a cost of 2 euro per cubic meter of water, we would be saving nearly 33,000 euro per year.

It is clear that small water savings do really count when looking into the bigger picture.

If you are looking for ideas to save water at home, have a look to this YouTube video were we show some useful tips to reduce the water usage at home and decrease the water bill. 

How to save water at home

We hope that you have found the information on this page informative and of value. 

If so, please consider to share or subscribe to our newsletter.

We dedicate a considerable amount of time and effort to create content and your support and engagement will encourage us to keep moving forward.

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Effiworkx blog

For more useful energy and water saving information and advice, have a look to our blog.

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