Natural scale may refer to:
Music 5-limit diatonic major scale Natural minor scale, as opposed to harmonic and melodic C major and A minor, the diatonic scale in keys with no sharps or flats Harmonic series (music), the series of pitches produced by instruments such as the natural horn and trumpet The major scale in Pythagorean tuning, formed from a succession of fifths starting one below the tonic On many wind instruments, the scale most easily produced by lifting the fingers one at a time from bottom to top
Other Nondimensionalization, the removal of units from a mathematical equation