Scale Helper
Find what key and scale your notes belong to. Click the piano, hear each note, and we'll match your selection against every common key and mode, then show you the diatonic chords to play with.
Click keys to add notes. Click again to remove.
How does this scale finder work?
You give us the notes you're using, by clicking a piano or typing them, and we compare your selection against every common key and scale: major, minor, harmonic minor, the seven modes (Dorian, Phrygian, Lydian, Mixolydian, Locrian), pentatonic, and blues. Each candidate is ranked by how many of your notes fit and how fully it covers your selection.
Wondering "what key am I in?" or "what scale are these notes?", pick the top match and you'll see the full scale, hear it, and play through its diatonic chords. Switch to Exploreto study any key/scale combination from scratch.
Everything runs in your browser. No upload, no signup, no limits. Built for songwriters, producers and students who need fast answers in the middle of a session.
Looking to turn your key into chord ideas? Try the free Chord Progression Generator.