The standard symbol for "square miles" is "sq mi." "m²" or "m ^ 2" universally refers to square meters (unless you've established unambiguously that you're tal

The standard symbol for "square miles" is "sq mi." "m²" or "m ^ 2" universally refers to square meters (unless you've established unambiguously that you're talking about miles — and even if you have it should still be "sq mi").