- How much water does a bathtub hold -

On average, a bathtub holds between 130 to 190 liters on water. That is around 80 gallons.

Bath tube water usage

If you want to know how much water your bathtub is using, you need to :

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

– Record your meter reading water consumption value

– Fill up your bathtub (have a nice and relaxing bath… with lots of bubbles)

– Record your meter reading water consumption value again

– Substract the values

Note that most probably you will have two water meter readers at home, one for cold water and another one for hot water. You will need to record both meter reading values, before and after filling your bathtub.

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.

Water usage and cost calculator

Once you know your bathtub water consumption, 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 liters 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 liters to you water units.

Convert liters to US gallons


Convert liters to UK gallons


A few other examples from our Water usage calculators page:

Water tap water usage calculator
Water tap
Dishwasher electricity usage calculator
Bath tube water usage calculator
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.

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.

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.

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.

Do you have any ideas or suggestions that you would like to share?

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