I'm alone at home, so I may just scare my neighbors by seeing how high I can get. Using this http://www.seventhstring.com/tuner/tuner.html
And it's official, my voice ranges from Eb2 to B5 on this day. The conclusion, I was right in that my voice sucks today.
That's still not too bad for a 'sucky voice'. All I know is, mine either goes low(ish), high or not at all.
The lowest note I know I've hit is a C#2 and the highest one is an Eb6. But both of those notes I've hit only once (actually two Eb6s in a row), lol.