Trunks as a babyAdded by BeadtmdcTrunks was born in Age 766 to Vegeta and Bulma, thus making him a Saiyan and Human hybrid.
#How old was trunks when he became a super saiyan movie
Because of his maternal side of the family being scientists, he also possesses a significantly huge amount of knowledge about biological and scientific-related knowledge from a young age, as demonstrated in the movie Dragon Ball Z: Bio-Broly, when he correctly identifies what the Culture Tank equipment is used for at age eight, as well as correctly defining two-thirds of what biotechnology is (the only thing he was not able to answer is what genetic-engineering is). He does not act like this however during his battle with Goten, because Goten is his best friend or it could be because it is a battle he could possibly lose. During and in between his battles at the World Martial Arts Tournament, he acts just like his father does, calm when he fights and insults his opponents. In his later years, Trunks adopts a personality similar to his future counterpart's. Trunks tends to usually take control over the younger Goten, stating to him numerous times how he is both older and stronger (during childhood). He is shown to be loving towards his parents and grandparents, and will not think twice about defending his family. Later on, Trunks does gain more respect for Goku after seeing Goku's Super Saiyan 3 power in action when holding off Majin Buu. This is shown when he disrespects Goku when they first meet, and for a long time after, as Trunks believes he is not as strong as his father, and nowhere near as reliable. He refuses to respect someone he does not like, another trait he shares with his father. Trunks has a combination of both of his parents' personalities: cocky and proud like his father, and spoiled and selfish like his mother. Present Trunks as a child during the Majin Buu arc is shown to be quite cocky and stingy, as well as mischievous, most likely due to the fact that this Trunks grew up with his father Vegeta and enjoyed the luxuries of peace, while Future Trunks grew up without Future Vegeta and in an apocalyptic world, causing him to be much more serious and cautious. Present Trunks wears a dark green gi, an orange belt, orange wristbands, and the same golden boots that Future Trunks wears. He has his father's eye shape, facial features and tanned skin, and his hair turns blond and eyes turn (pupil-less) green when he becomes a Super Saiyan.
Trunks has his grandfather's lavender hair color, and his mother's blue eyes. 3.3.3 Super 17, The Ultimate AndroidEdit.3.3.1 Quest for the Black Star Dragon BallsEdit.