Major tenth interval on C

Major tenth interval on C.

A tenth is the diatonic interval of a compound third, in other words, an octave plus a third. A major tenth interval is the distance from any note to a note sixteen half-steps away, either ascending or descending, i.e., a perfect octave plus a major third. The various different types of diatonic tenths are, in order of size from smallest to largest: diminished tenth, minor tenth, major tenth, and augmented tenth.