How do I find my vocal range?
Hum or sing down to your lowest comfortable note and hold it for two seconds, then slide up to your highest easy note and hold it. Comfortable means no pushing and no cracking.
Those two notes are your working range. Compare its middle with the typical ranges of the six voice types to find your likely type.
More questions: Is there an app that checks if I'm singing in tune? · How accurate is an online pitch or vocal range test? · What is a cent in singing? · Can you learn to sing in tune? · How do I sing high notes without straining?