In the Bible, how old was Jeremiah when he became a prophet?

Jeremiah was around 20 years old when he received his prophetic calling. This age is inferred from Jeremiah 1:6, where he expresses his reluctance to fulfill the role by saying, ‘Ah, Sovereign Lord, I do not know how to speak; I am too young.’ While the exact age is not explicitly stated, the context suggests he was a youth, likely in his late teens or early twenties at the time he began his ministry.