Leviticus 25:52

Context
25:52 but if only a few years remain ¹  until the jubilee, he must calculate for himself in keeping with the remaining years and refund it for his redemption.

Leviticus 27:3

Context
27:3 the conversion value of the male ²  from twenty years old up to sixty years old ³  is fifty shekels by the standard of the sanctuary shekel. ⁴ 

Leviticus 27:5

Context
27:5 If the person is from five years old up to twenty years old, the conversion value of the male is twenty shekels, and for the female ten shekels.