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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

Three or four baths a week?

479 replies

christonapushbike · 13/03/2026 14:51

When we redid our bathroom we got a lovely big deep tub with the intention of using it as a nice treat approx once every 2-3 months. DSD enjoys using it 3-4 times a week and complains that her ensuite shower isn't usable as the pressure in her shower is 'too low' (its fine- not a power shower but totally usable!). Am I unreasonable to feel this is completely ungrateful attitude and an ensuite is a massive privilege (only she has one in our house) she spends up to 2 hours bathing in our bath and I've worked out each bath costs £3.50 in gas and water (it's 300 litre capacity). When challenged on why she refuses to use her own bathroom she just shrugs/ scowls. Her ensuite is a shower room with a toilet (no bath) for reference.

OP posts:
InveterateWineDrinker · 13/03/2026 17:02

likelysuspect · 13/03/2026 16:39

Yes I think we need some proper maths applied to this, I simply dont believe OP's estimate.

OP's maths is plausible.

The specific heat capacity of water is 4,200 Joules per kilogram degree centigrade. One litre of water is, of course, one kilo.

If you assume that the mains water coming in is 8 degrees and is heated to 40, then to heat up 300 litres of water by 32 degrees would require 300 x 4200 x 32 = 40,320,000 Joules of energy.

There are 3,600,000 Joules in a kilowatt hour (the unit we use for energy tarriffs - a watt is the consumption of one Joule per second) so the 40,320,000 Joules works out at 11.2kWh.

Current electricity price cap is 27.69p per kWh so that's just over £3.10 if 300 litres is heated using electricity.

United Utilities - other water companies are available - prices metered water at 0.475p per litre including foul charges. (Earlier I used 0.365 but that was the 2024/25 rate - thanks Google AI for getting it wrong and putting it as my top search result). So 300 litres on a UU meter would be £1.43.

The overall cost of a 300l bath in these circumstances is actually over £4.50 so assuming the bath isn't filled to the brim £3.50 is certainly in the right ballpark.

Wingingit73 · 13/03/2026 17:03

You must hate her and guess she.knows now.

Octavia64 · 13/03/2026 17:03

Mumstheword1983 · 13/03/2026 16:42

Sorry if this question has been a answered. We have a jacuzzi bath. It's used every night pretty much (4 kids) they bath every other night. Two have eczema and hate the feeling of showers. Is this costing me £3.50 a go? Surely not. It's a normal sized jacuzzi bath (recently moved, we didn't install it).

OP I think if it is costing that then once a week is maybe reasonable?

Edited

If you tell me how big the bath is and what sort of system you have for heating your water I can calculate it!

(on a smart meter just look at the total before the hot water goes on for the bath and again as you run it)

2O26 · 13/03/2026 17:04

I read books, write exams for my students. email etc. in the tub. Could be in there for 4 to 5 hours. My sanctuary from the world. OP, would you feel the same way if it was your own daughter as opposed to your step-daughter spending hours in the tub?

Sally2791 · 13/03/2026 17:04

Bonkers.
poor child. Why on earth did you put it in??

likelysuspect · 13/03/2026 17:05

InveterateWineDrinker · 13/03/2026 17:02

OP's maths is plausible.

The specific heat capacity of water is 4,200 Joules per kilogram degree centigrade. One litre of water is, of course, one kilo.

If you assume that the mains water coming in is 8 degrees and is heated to 40, then to heat up 300 litres of water by 32 degrees would require 300 x 4200 x 32 = 40,320,000 Joules of energy.

There are 3,600,000 Joules in a kilowatt hour (the unit we use for energy tarriffs - a watt is the consumption of one Joule per second) so the 40,320,000 Joules works out at 11.2kWh.

Current electricity price cap is 27.69p per kWh so that's just over £3.10 if 300 litres is heated using electricity.

United Utilities - other water companies are available - prices metered water at 0.475p per litre including foul charges. (Earlier I used 0.365 but that was the 2024/25 rate - thanks Google AI for getting it wrong and putting it as my top search result). So 300 litres on a UU meter would be £1.43.

The overall cost of a 300l bath in these circumstances is actually over £4.50 so assuming the bath isn't filled to the brim £3.50 is certainly in the right ballpark.

Is OP heating with electric though?

MooFroo · 13/03/2026 17:05

Why did she get the en suite and not you as the couple of the house?

Iocanepowder · 13/03/2026 17:05

Yeah sorry op, i’m all for saving water and energy as i work in utilities, but you lost me at ‘she is only allowed to have 4 baths a year’

Jellycatspyjamas · 13/03/2026 17:07

SunshineAndSandalsMakeMeHappy · 13/03/2026 16:54

It’s terrible service tbh, sometimes I need to phone him if he’s downstairs. He really needs to up his game. He draws the line at bowls of crisps though, I don’t therm refilled, he thinks I’m weirdo for eating snacks in the bathroom.

A gin and tonic with a bowl of crisps is the ultimate in bath time luxury - my kids gave me a bath shelf for mothers day to facilitate bath time snacks.

YerMotherWasAHamster · 13/03/2026 17:08

No child should have to be grateful for being allowed to bathe in their home.

Sunbeam18 · 13/03/2026 17:11

You put a bath in to use as a treat every few months?!

LoveItaly · 13/03/2026 17:14

I seem to be in the minority here as I think it’s a bit unreasonable to take over the family bathroom for up to two hours at a time when you have your own en-suite shower. Anyone having a bath for that long should check first that no one else needs to use the bathroom for quite some time.

Theonebutnotonly · 13/03/2026 17:15

Jellycatspyjamas · 13/03/2026 17:07

A gin and tonic with a bowl of crisps is the ultimate in bath time luxury - my kids gave me a bath shelf for mothers day to facilitate bath time snacks.

Quite right too.

I also sometimes FaceTime from the bath. It sounds a bit echoey and you have to be careful where the iPad camera is pointing, but apart from that it’s great!

itsthetea · 13/03/2026 17:15

YerMotherWasAHamster · 13/03/2026 17:08

No child should have to be grateful for being allowed to bathe in their home.

A shower is bathing , the bath is luxury for many people

Muffinmam · 13/03/2026 17:17

Remove the tap when she stays over.

Bikergran · 13/03/2026 17:17

Tell her no more than one a week. Get a plumber to install a pump on her shower.

ChillingWithMySnowmies · 13/03/2026 17:18

This reply has been deleted

Message deleted by MNHQ. Here's a link to our Talk Guidelines.

ChillingWithMySnowmies · 13/03/2026 17:18

Nickyknackered · 13/03/2026 14:53

I take it you don't like her?

nailed it in the first post.

HonoraCausa · 13/03/2026 17:18

I usually have two baths every day. You are being totally unreasonable.

Muffinmam · 13/03/2026 17:20

InveterateWineDrinker · 13/03/2026 17:02

OP's maths is plausible.

The specific heat capacity of water is 4,200 Joules per kilogram degree centigrade. One litre of water is, of course, one kilo.

If you assume that the mains water coming in is 8 degrees and is heated to 40, then to heat up 300 litres of water by 32 degrees would require 300 x 4200 x 32 = 40,320,000 Joules of energy.

There are 3,600,000 Joules in a kilowatt hour (the unit we use for energy tarriffs - a watt is the consumption of one Joule per second) so the 40,320,000 Joules works out at 11.2kWh.

Current electricity price cap is 27.69p per kWh so that's just over £3.10 if 300 litres is heated using electricity.

United Utilities - other water companies are available - prices metered water at 0.475p per litre including foul charges. (Earlier I used 0.365 but that was the 2024/25 rate - thanks Google AI for getting it wrong and putting it as my top search result). So 300 litres on a UU meter would be £1.43.

The overall cost of a 300l bath in these circumstances is actually over £4.50 so assuming the bath isn't filled to the brim £3.50 is certainly in the right ballpark.

I admire your ability to explain this sort of math. We were never taught this in high school.

Isthateveryonethen · 13/03/2026 17:20

How petty are you working the cost! It’s only 3.50! Let her enjoy it

SunshineAndSandalsMakeMeHappy · 13/03/2026 17:21

Jellycatspyjamas · 13/03/2026 17:07

A gin and tonic with a bowl of crisps is the ultimate in bath time luxury - my kids gave me a bath shelf for mothers day to facilitate bath time snacks.

I have a lovely bath shelf too, the refilling of snacks needs to be discussed as I can be in there for a couple of hours, DH really is failing in this respect 🤣

ShakeNCake · 13/03/2026 17:21

Muffinmam · 13/03/2026 17:17

Remove the tap when she stays over.

Ideas for reducing bath occurances:

Shark
Pigeon spikes
Set the plumbing up to sound like a crying baby when the taps are on
Do a big poo at the times when she really wants to bathe
Train a crow to peck the bathroom window incessantly

Charlize43 · 13/03/2026 17:22

I can spend hours in the bath, candles, lovely relaxing music, Prosecco in ice bucket by the side, good book... simple pleasures.

ChillingWithMySnowmies · 13/03/2026 17:24

Who the fuck complains about someone having a bath a few times a week?
YABU and frankly being weird about it (yes i will repeat it for which ever snowflake reported my post for saying it in that one. get a life)

Get her a power shower if you're that bothered. it might be cheaper in the long run.