how old is spongebob now
Well, SpongeBob has a date of birth: July 14, 1986. If we assume that the series takes place in our times, that would make him 28. However, Bart and Lisa Simpson have been 8 and 10 for more than 20 years now. So if we assume that his age is constant in the show (which premiered in July 17, 1999), that would make him 13.