How to check visa length

Hi guys, Im trying to work out how i find out how long ive stayed in brazil...Ive had multipe entries this year and im looking to stay for 180days ...How do you find out as im aware ypu can only stay 180day max in one year does this start from first entry?

Only allowed 90 days. Check your passport as to exit and entry stamps and subtract days in BR. Best way, you can go to the PF office and know for sure and ask for an extension at same time. Yes many get the extra 90 days, but it is not automatic, you have to go to PF for the extension.
Do not wait for last day.

Thanks for the reply, im in the process of recieving a new passport.. will my days be logged in the system...how does the 90-180 days in one year work... is it from time of first entry to brazil..?

It is from the first entry. You have 90 days from entry after 60 I would go to PF for another 90 with a reason.  Be sure to travel with old passport that has stamps.