Weight supported by a bath

[wordyone]

Does anyone know what is the maximum body weight that the average household bath will support, complete with a tub full of water? I have to confess to being rather heavy and last time I had a bath I am sure I heard some creaking noises and felt some vibrations from the bath. I have stuck with a shower ever since!! And I feel rather nervous about having a bath again.

[jake-the-peg]

An average bath is apparently about 80 litres and as a litre's 1Kg about 80Kg.

So it's a bit like having another person sit in the bath with you with no water

Does that help?

[woodchopper]

If ti were a plastic bath I may be concerned - but if it is a metal one, no.

[ConfusedJohn]

A full bath weighs a fixed amount. Put a person in the bath (regardless of weight) and fill it to the brim and the total will weigh the same. This is because the water displaced by the larger person will be taken up by the person's body. A thinner person will displace less water but will need more water to reach the same level.

[wordyone]

Thank you all three of you for your answers. With regard to Jake the Peg's answer - does 80kg mean person with water? If so then my rough calculation translates 80kg into 12.5 stones - not especially heavy really. And I have to confess I am heavier than that!
I think my bath is plastic which is why I am more nervous than if it were a metal one.
I was never much good at physics but I think I can understand ConfusedJohn's answer which seems to suggest that no-one is too heavy - as long as you can actually fit into the bath! I hope he is right because I might give a bath another try sometime soon.