In order to answer this question, there are a few factors that need to be considered.
First, we need to know the approximate size of Mr. Sponge Bob. Unfortunately, Bikini Bottom doesn't seem to use standard measurements so we can only estimate by proxy. The only decent approximation of Sponge Bob's relative size comes from his brief escapade at shell beach in his full length animated film. Judging from screen captures of Sponge Bob being held by hero and all-around swell guy David "The Hoff" Hasselhoff, I would estimate that he was no more than 4 inches tall and approximately 1/2 inch thick.
Given the only available data on sponge growth gives an approximate rate of 0-7 centimeters per year (or 2.75590 inches a year), Spongebob could not be less than 2 years. If we take an average and assume he grew consistently at 1.378 inches per year, that would make him 2.9 years old at the time the movie was filmed.
He's a kitchen sponge, so lets call it 17 years (he drives and has a job) and call it a night.
Actually, as seen on his drivers license, he is 23 years old.
SpongeBob's parents are sea sponges, and SpongeBob is a kitchen sponge.
it is about a sea sponge named spongebob squarepants it is on nickelodion spongebob is a friendly sponge who is an adult but acts a lot like a 6 year old kid
Mystery Was The Name Of SpongeBob's Sea Horse. =]
a sponge that lives in the sea
Sponge bob squarepants
no, spongebob is a sea sponge.
He is set in sponge!! under the sea
sponge bob is square because a sponge is square and he is a sea sponge ITS A JOKE that's why he's square :) ;) B)
Sponge bob is a sea sponge, that means he's an animal. :)
SpongeBob is a sea sponge even though he is shaped like a synthetic kitchen sponge.
Hes a sea sponge...
Sponge bob lives under the sea so a Maltese sponge must live in Maltese sea.
SpongeBob is a yellow sponge who's lives in a pineapple under the sea.
Its based on a sea shanty