I let my monkey brain come up with a reasonable estimate after evaluating what is required. Then i just add in some random amount of time (If my estimate is around 3 days i just randomly say it'll take me 3 days, 3 hours, 21 minutes and 50 seconds). It usually cracks up people during meetings and ends up getting me more time because they like to round it up xD

Studied for 9 years in a degree, decided to quit because the math related subjects were to hard for me. Got a job anyways. TL;DR; a degree doesn't really atleast. not if you find the right company.