Pet Rats – Weights and Life Span

In Critterized Pet Supplies, Pet Rats, Rats - Care & Info by NUG - SoulLeave a Comment

Rat Weights and Life Span

Rats weights and life span can differ due to food, genetics and care. This is a just an average weight and life span guide 🙂

Babies

3 weeks of age
4 weeks of age
5 weeks of age
6 weeks of age
7 weeks of age
8 weeks of age
Full grown

Both

50g – 60g
90g – 100g

Males

 

140g
170g
220g
250g-270g
300g-500g

Females

 

120g
150g
180g
200g-250g
280g-350g

Things like genetics, being sick, change of food or enviroment, pregnant/nursing doe’s and lack of care can cause rats to be under these weight, but like us not all rats are the same. Some rats may be heavier then these average weight due to bone structure or over eating.
The average healthy happy rat life span is 2-3 years. Although there are stories of rats that have lived closer to 5 years. I have had a male rat that lived to just under 4 years but he was just a lap rat lol he didn’t move around all that much but loved to snuggle 🙂