Musical Scale Finder – Show Me a Scale on Piano

A musical scale is a sequence of notes ordered by pitch, typically spanning one octave. Scales form the foundation of melodies, harmonies, and chord progressions in virtually all musical traditions. The most common scales in Western music are the major and minor scales, each with a distinct pattern of whole and half steps (semitones).

The primary difference lies in the pattern of intervals. A major scale follows the pattern W-W-H-W-W-W-H (where W=whole step, H=half step) and typically sounds bright or happy. A natural minor scale follows W-H-W-W-H-W-W and sounds darker or more melancholy. The third scale degree (the "mediant") being lowered by a half step in minor scales is largely responsible for this emotional contrast.

Modes are scales derived from the major scale by starting on a different degree. For example, Dorian starts on the 2nd degree of the major scale, Phrygian on the 3rd, Lydian on the 4th, Mixolydian on the 5th, Aeolian (natural minor) on the 6th, and Locrian on the 7th. Each mode has a unique sound and is used extensively in jazz, rock, film scoring, and various world music traditions.

A pentatonic scale contains only five notes per octave (compared to seven in major/minor scales). The major pentatonic scale uses scale degrees 1-2-3-5-6 (omitting the 4th and 7th), while the minor pentatonic uses 1-♭3-4-5-♭7. Pentatonic scales are among the most universal scales, found in folk music across cultures worldwide. They're also heavily used in blues, rock, pop, and jazz improvisation.

The blues scale is a six-note scale based on the minor pentatonic with an added "blue note" — the flattened 5th (♭5), also called the tritone. This chromatic passing tone gives the blues scale its distinctive, expressive sound that's central to blues, rock, jazz, and R&B music. The pattern is: root, ♭3, 4, ♭5, 5, ♭7.

To identify a song's key, listen for the note that feels like "home" or the tonal center — the note the melody keeps returning to. Then use this scale finder to test different scales starting from that root note. Play the scale and see which one matches the song's notes. Often, the chords used in the song (especially the first and last chords) will also point to the key.

The harmonic minor scale (with its raised 7th degree) creates a strong leading tone that pulls toward the tonic. It's commonly used in classical music for creating tension and resolution, particularly in minor-key chord progressions. The distinctive 1½-step gap between the 6th and 7th degrees gives it an exotic, Middle Eastern-inspired sound.