I saw there wasen't one and I thought it could be helpful to some :) There is some I'm not sure of, that's why I've written release year ^^
The list isen't finished yet, there is some missing!
Note: Most of the movies are arguably non-canonical due to conflicts such as the appearance of a tail, being able to go SSJ etc. Example: The movie ''Cooler's Revenge'' would had to have taken place right after the Freiza/Freeza saga, since he'd been defeated. But it would also have had to have taken place after the Trunks saga since Goku was there. But that's impossible because Gohan had short hair during that saga, yet it's long in the movie. I read a theory that they don't have a definite timeline, and instead we're just given a general idea of when they take place. That theory seems to be right. Therefore the episode numbers I've written may not be intirely correct, but it's around there.
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Dragon Ball (1986-1989)
Dragon Ball: Curse of the Blood Rubies (1986) Between episode 43-44
Dragon Ball: Sleeping Princess in Devil's Castle (1987) Between episode 70-71
Dragon Ball: Mystical Adventure (1988)
Dragon Ball Z: (1989-1996)
Dragon Ball Z: Dead Zone (1989) Between episode 11-12
Dragon Ball Z: The World's Strongest (1990) Between episode 39-40
Dragon Ball Z: The Tree of Might (1990) Between episode 54-55
Dragon Ball Z: Lord Slug (1991) Between episode 82-83
Dragon Ball Z: Cooler's Revenge (1991) Between episods 99-100
Dragon Ball Z: Return of Cooler (1992) Between episode 130-131
Dragon Ball Z: Super Android 13! (1992) Between episode 147-148
Dragon Ball Z: Broly - The Legendary Super Saiyan (1993) Between episode 177-178
Dragon Ball Z: Bojack Unbound (1993) Between episode 192-193
Dragon Ball Z: Broly - Second Coming (1994) Between episode 220-221
Dragon Ball Z: Bio-Broly (1994) Between episode 234-235
Dragon Ball Z: Fusion Reborn (1995) Between episode 258-259
Dragon Ball Z: Wrath of the Dragon (1995) Between episode 270-271
Dragon Ball GT (1996-1997)
Dragon Ball: Yo! Son Goku and His Friends Return!! (2008)
Specials
Dragon Ball Z: Bardock - The Father of Goku (1990) Between episode 63-64
Dragon Ball Z: The History of Trunks (1993) Between episode 174-175
I haven't added Kai since it's a remake of Z.
nice timeline. i could have used this when i was in middle school like 15 years ago lol.
Nice list! The movies from the Dragon Ball series can be watched at any time since they are a retelling of the story depicted in the anime series. Best to watch those after the series and before Dragon Ball Z starts.
Those Dragon Ball Z movies are a lot harder to place.