There are two main ways to answer this question, depending on what context you're using:

**1. In terms of days:**

* There are 7 days in a week, so:

* **20 weeks * 7 days/week = 140 days**

**2. In terms of months (approximate):**

* A month typically has around 4 weeks, but this can vary slightly depending on the month.

* Therefore, as an estimate:

* **20 weeks / 4 weeks/month ≈ 5 months**

However, it's important to note that this is an approximation, and the actual number of months could be slightly less or more depending on the specific weeks you're considering.