Vocal-range key finder
Which key fits your voice, and stays playable — the capo advisor's question with the singer's constraint added.
This app has no way to know a song's melody from a chord sheet — so you supply your comfortable range and the song's range yourself, and the answer below is exact arithmetic on those four notes, nothing guessed.
Your lowest comfortable note
Your highest comfortable note
The song's lowest note
The song's highest note
Fill in all four notes above to see which keys fit your voice.