Here is a link to the table showing ranges. Remember that singers in each range can sing above and below these notes, too. They are not limited to what is shown on this scale. The table is provided as an aid for composers when writing parts for voices. Vocal Ranges, at a Yale site Here is the page for composers this table is linked to music cataloging at Yale.

Many people don't know they can sing above the range of the speaking voice, and the best notes can be those that are more brilliant once you have learned how to reach them. Last week I met another singer who had been told he was a baritone, and had performed as a baritone in three Gilbert and Sullivan productions. He was used to pushing the voice (like belting) to get that volume as a baritone, but when I heard him sing higher, I said, I bet you are really a tenor. One guest conductor who had visited the town where he used to live had told him he was really a tenor. We went to my teacher, because I want to learn some duets to perform together, and she said to him, you are definitely a tenor. Now, he just needs to learn to sing with more relaxation throughout his whole range so he can connect the baritone range with the tenor range, where his voice really opens up to some brilliant tones. By learning not to push for volume, he can back off and blend his voice more with mine in harmonies.