Assuming their number designation could be a hint to their approximate age when they were introduced, as they were kidnapped as children, this would make both Android 17 and 18 in their late 20's or early 30's by the end of the Dragon Ball Super anime.
Well, people tend to forget that Android 18 is actually Later in the series (set several years after the "Cell" saga), it is implied that she might be in her mid-30s. In human years, that would make her around 23 or 24 when Trunks first meets her.
Android 18 (Japanese: 人造人間18号, Hepburn: Jinzōningen Jū Hachi Gō, lit. "Artificial Human #18") is a fictional character in the Dragon Ball manga series created by Akira Toriyama. Android 18 makes her debut in Chapter #349 "The Androids Awake!", first published in Weekly Shōnen Jump on November 12, 1991.
Android 17 is a half-human, half-machine created by the evil scientist Dr. Gero. Android 18 is actually his twin sister, and when they were still regular humans their names were Lapis and Lazuli. Both are fitted with perpetual energy reactors, meaning they have effectively infinite stamina.
9 Krillin (44 Years Old)
His height and lack and hair make him look like he's still in his 20s!
Krillin : ... Yes, I do! I would like you to change Android 17 and 18 into human beings, so they can live out their lives in peace!
Assuming their number designation could be a hint to their approximate age when they were introduced, as they were kidnapped as children, this would make both Android 17 and 18 in their late 20's or early 30's by the end of the Dragon Ball Super anime.
Android 18 isn't exactly an android, she's specifically a cyborg. She was human once but Dr.Gero remodeled her and added cybernetics. Gero left her human enough to conceive a child. And so she did with Krillin. This is actually referenced in DBZ Abridged.
Android 19 is an antagonist in Dragon Ball and the nineteenth Android created by Dr. Gero to kill Son Goku. Unlike all the other Androids, he seems to only exist in the present timeline. He was a major antagonist in the Android Saga of Dragon Ball Z and a minor antagonist in the Super 17 Saga of Dragon Ball GT.
Future Trunks claimed that Android 17 & 18 were stronger than their future counterparts.
Son Goku (孫 悟空, Son Gokū), born Kakarotto (カカロット, Kakarotto), is a Saiyan from Universe 18 whom for many decades has been regarded as Earth's savior.
Saiyan 18 has the ability to turn Super Saiyan thanks to her heritage. Having obtaining this form from training with Vegeta. Her power increases 50 times over from her regular level.
Android 17 ( 人 じん 造 ぞう 人 にん 間 げん １７ 号 ごう , Jinzōningen Jū Nana-Gō), Lapis (ラピス, Rapisu) when he was an ordinary human, is the younger twin brother of Android 18 and Dr. Gero's seventeenth android creation, designed to serve Gero's vendetta against Goku.
Doctor Gero created Androids 17 and 18 from two twins he kidnapped as children. Here's why the two siblings were targeted by the mad scientist. Among the most powerful fighters in the entire Dragon Ball franchise are the formidable twins Androids 17 and 18.
Another notable change is death. The biggest example is Goku, who was dead for seven years, causing him not to age, thus making him physically the same age he was when he died upon his return to Earth, and this is clearly noted.
When Super Buu escapes the Hyperbolic Time Chamber Android 18 is killed, along with her family, by Super Buu, who turns her into chocolate and eats her (interestingly making this the second time that she is ingested by a super-villain in Dragon Ball Z).
18 fell for Krillin because she admired his bravery as well as him being a loving husband and a good father but in Super, she keeps complaining about how he's not manly enough which then leads to him having to save her all the time.
Android 21 reveals in a private talk with the player that while she may have the appearance of an adult, she is actually less than ten years old, and regrets not having an adolescence, finding it awkward when small children call her "ma'am".
In most states in the United States, a child becomes an adult legally when they turn 18 years old1. However, “adults” can mean different things when you ask different people. Let's find out what it means to become an adult according to parents, the law, and science.
It is illegal in most places for a 15 year old and a 18 year old to have sex. There are no specific laws about the pregnancy.
Upon his resurrection through the Dragon Balls, Goku remains physically 23 but chronologically ages to 24 when he helps drive Vegeta from the Earth.
In the 7 years between the Cell saga and the Buu saga, Android 18 and Krillin got married and had a kid. Until Dragon Ball Super, they apparently lived with Master Roshi in the Kame house. Whatever the reason for this strange dynamic, we'll never know.