The Bible doesn't explicitly state Paul's age during his conversion on the road to Damascus. However, we can make some inferences:
* He was likely a young adult: In the book of Acts, Paul is described as a "young man" at the stoning of Stephen (Acts 7:58). This suggests he was likely in his late 20s or early 30s around that time.
* The conversion happened shortly after: The conversion on the road to Damascus occurred not long after Stephen's death.
Therefore, it's generally believed that Paul was likely in his late 20s to early 30s when he experienced his transformative encounter on the road to Damascus.