How do you convert M2 to length?

Excuse me, but I'm a bit confused about something. Could you please explain how one goes about converting M2, which I understand to be a unit of area, into a measure of length? I'm not sure if I'm misunderstanding something here, but as I see it, area and length are two fundamentally different units of measurement. Is there a specific formula or method that I'm unaware of that allows for such a conversion? I'd really appreciate it if you could clarify this for me.