How many piano chords are there roughly?

The number of possible piano chords is vast. There are 12 notes in the chromatic scale, and each of these notes can be played as the root of a chord. There are then three main types of chords: major, minor, and diminished. Each of these types of chords can be further divided into various inversions, which creates even more possibilities.

To give a rough estimate, there are approximately 12 (notes) * 3 (types of chords) * 4 (inversions) = 144 different piano chords. However, this number does not include the possibility of using extended chords, such as seventh chords, ninth chords, eleventh chords, and so on. When including these extended chords, the number of possible piano chords becomes even larger.

In conclusion, there are roughly 144 basic piano chords, but the actual number of possible chords is much larger when considering extended chords.