You are 168cm at the age of 17 how tall will be 20?

It is difficult to provide an exact prediction of your adult height based solely on your current height and age. However, there are a few general factors that can influence height growth:

- Genetics: Your genes play a significant role in determining your adult height. If your parents or close relatives are tall, you are more likely to be tall as well.

- Nutrition: Proper nutrition is essential for healthy growth and development. Eating a balanced diet that includes sufficient protein, calcium, and other essential nutrients can support optimal height growth.

- Physical Activity: Regular physical activity, especially exercises that promote bone and muscle strength, can contribute to overall growth and development.

- Puberty: The timing and duration of puberty also influence height growth. Generally, individuals who experience puberty later tend to grow taller.

Since you are still in your teens and likely still going through puberty, your height may still increase. However, it is important to note that the growth rate typically slows down after the teenage years.

If you are concerned about your height or growth, it is advisable to talk to a medical professional, such as a doctor or endocrinologist. They can assess your growth patterns and provide personalized guidance and recommendations based on your individual circumstances.