HarmonyCalc

Play the keys and get the chord! HarmonyCalc is a simple tool for learning harmonies, giving you common tonal chords and a basic atonal representation of whatever you play. Other features:
*The ability to adjust black key notes to be either flat or sharp
*Hear the notes as you play them
*Hear the entire chord you've picked out
Use Chord Calculator to aid your music theory studies, check your work, or as a supplement to other theory resources.