have you tried the online calculator ?jaytarun said:I will be eligible in April 2017, can some one suggest how long should I wait before applying for citizenship to be on safe? I was out of the country for almost 1.5 years( there was a family emergency)
If you are 100% sure of your travel dates , entries and exits , you can apply but a buffer is always safe and highly stress-relieving because if later on you realize you forgot to mention a trip or were mistaken on dates then all the time spent waiting will be lost and your application will end up being rejected and may be subject to more scrutiny when you will reapply.
Plus you were out of canada for more than a year which would likely trigger an RQ . You'd better be playing on the safe side by leaving a couple of days /weeks after you are eligible to apply .At the end of the day , it's your call . Some applied at 1460 days and were 100% sure of dates and had documentation to back that up such as flight tickets , hotel reservations etc...
My guess is applying right on 1460 and having spent 18 months out of Canada is subject to residence compliance scrutiny from case officers .