Estimating age by weight?

I have a male that is a decent eater (not good, not bad) and he weighs 1600 grams at 9-years-old. Just trying to help. :)

I feed my balls every 5 - 7 days a meal about the same girth as the snake. After reviewing my record I can state that my balls put on average 70-90g weight each month, these stats are for my balls who have not skipped a meal:gj:

Note that the weight gains Ive talked about above are for my balls aged 6 months or more, my ball which are less than 6 months put on about 50g or so per month:cool: