French equivalent of "just in case"?

Question

I'd like to know how a French speaker might express this, especially when nothing specific follows it, e.g.> One of these things is usually enough, but I've bought a second one, just in case.> Un seul de ces machins suffit normalement, mais j'en ai acheté un deuxième, …

Answer 1

"au cas où" :)

Answer 2

In France we will say: "au cas où" = "just in case"

Answer 3

A typical expression the French will use is, "au cas où" (the "s" from "cas" should tie with "où" and sound like a "z").

Answer 4

One expression I have heard is "en cas où" which means pretty much, just in case. I hope that this helps!

Jacki