How long before I reach stages 4 and 5?

Question:

If I’m tanner stage 3.7, how many years or months would it take for me to reach tanner stage 4 and tanner stage 5?

Answer:

Each stage (from 2 to 4) lasts about two years. At stage 3.7 you are roughly 3/4 or a year and a half through stage 3. You have another 6 months before you reach stage 4. You’ll be in stage 4 about 2 years before you reach stage 5.