This site has a nice layout, but is sort of confusing to navigate. They have bunches of content on DBZ (almost as much as me ^_^ LOL)

Layout: 9/10
Content: 7/10
Overall: 8/10

                
Dragonball Character Ages Master Roshi was 307 years old when Goku was born.

Master Roshi began to go perverted at 123 years old, when he began buying porno magazines.

Grandpa Gohan was 79 years old when he found Goku in the forest.

Krillin is 1 year older than Goku.

Yamcha and Tenshinhan (Tien in America) are 4 years older than Goku.

Bulma was 16 years old when she met Goku (4 yrs older than him).

Goku told Bulma that he was 14 years old when they met. In the first Tournament, he confessed that he was really 12 years old and that he didn't know how to count before.

Trunks was 6 years old at the beginning of the Buu Saga.

Goten is 1 year younger than Trunks.

Pan was 5 years old when Dragonball Z ended. At the beginning of Dragonball GT, she was 14

Bra was 4 years old when Dragonball Z ended.

The first Tenkaichi Budoukai was held 87 years before Goku was born.

Gohan was 4 when he was first introduced (5 and a half in the American dubbed version of Dragonball Z said). He trained under Piccolo for one year, then went to Planet Namek for another year. By the time Future Trunks arrived, Gohan was 7. In the Cell Series, Gohan trained for three years in preparation of the androids. At 10, he trained for another year in the Room of Spirit and Time in Sky Palace. At 11, Gohan killed Cell. At 16, Gohan entered Orange Star High School.

Dende was 5 years old when he first appeared.

Kami was over 900 years old when he fused with Piccolo.

The Buu Series takes place 7 years after the Cell Series.