Minor Scales Compared: Which One to Use and Why

“Minor” is not one scale but three, and they differ only in their top two notes. Those two notes decide whether a cadence lands, whether a melody walks smoothly up to the tonic, and which chords the key can build. This page compares the three directly and tells you which one to reach for.

Hear the Change Before You Read About It

Pick a root, then switch between natural minor, harmonic minor and melodic minor while watching the row of diatonic chords underneath. Nothing in the lower half of the scale moves. The chord on the fifth degree flips from minor to major the moment the seventh is raised, and that one change is the whole story of this page. Play the v, then play the V, then resolve each of them to the tonic.

One Problem, Three Answers

The three minor scales are not three unrelated colours. They are a chain of repairs, and each one answers the problem the previous one left behind.

Natural minor leaves the tonic unguarded. Its seventh degree sits a whole tone below the root: G below A in the key of A minor. A leading tone is a half step below the tonic, and the half step is what creates urgency. The harmonic consequence is bigger than the melodic one. The triad on the fifth degree comes out minor (E, G, B), so it holds no leading tone and no tritone, and a v to i move reads as a change of colour rather than an arrival. That is exactly right for modal rock and folk, and useless when a phrase has to close.

Harmonic minor raises the seventh to repair the cadence. G becomes G♯, a half step below the tonic. The chord on the fifth degree becomes E major, and adding the seventh gives E7, whose tritone (G♯ against D) squeezes inward to A and C. The scale is called harmonic because the alteration was made for the sake of the harmony, not the melody.

That repair damages the melody. The distance from the flat sixth to the raised seventh is now three semitones, an augmented second, F up to G♯. Sing it and the line lurches. It is a marvellous sound when you want it, and it is the reason harmonic minor is associated with flamenco, Balkan music and metal, but it is not a neutral stepwise scale. The triad on the flat third also turns augmented, which puts an unstable chord in the middle of the key.

Melodic minor raises the sixth as well to close the gap. F becomes F♯, the step up to G♯ becomes an ordinary whole tone, and the top of the scale walks into the tonic. You keep the leading tone and lose the lurch. The price is that the upper half of the scale now sounds major, which is why classical practice restricts it to rising lines.

Each scale keeps what the previous one gained and pays a new price, so there is no best one. There is only the right one for the phrase in front of you.

The Three Scales Side by Side

All three shown from A, with the altered degrees in bold.

Everything up to the fifth is shared. That is why a piece can move between the three inside a single phrase without sounding as though it has changed key: only two notes are ever in question. The augmented second appears in one place only, between degrees 6 and 7 of harmonic minor.

The Chords Each Scale Generates

The practical consequences live here, not in the note lists. These are the triads each scale builds on every degree, again from A.

Four differences matter. The V against v is the one you will use every day: only the raised seventh gives a dominant chord with real pull, which is why minor key cadences in classical, flamenco and jazz almost always borrow it. The diminished ii of natural and harmonic minor becomes a plain minor ii in melodic minor, which is what makes a proper ii to V to i possible in a minor key. The augmented III is the oddity of both altered scales, rarely used as a chord in its own right and usually heard as a passing sonority. And the seventh degree turns from a friendly VII major chord into a diminished triad, which in harmonic minor extends to a fully diminished seventh chord (G♯, B, D, F). That chord exists in harmonic minor only.

Add sevenths and the tonic itself changes character: the raised seventh turns i into a minor-major seventh chord, the signature sound of both altered scales. For how these stacks are built from any scale, see Diatonic Chords: A Beginner’s Guide.

Real music mixes the three tables freely. A piece in A minor may use F natural in a falling line and G♯ in the cadence within the same bar. The tables describe what is available, not three sealed compartments.

Why Melodic Minor Changes on the Way Down

Classical theory gives melodic minor two forms:

• Ascending: A, B, C, D, E, F♯, G♯, A
• Descending: A, G, F, E, D, C, B, A

The raised sixth and seventh exist to push a line up into the tonic. Coming down there is nothing to push towards, and worse, F♯ and G♯ in a falling line sound like notes that want to turn back upwards, which drifts the ear towards A major. Restoring the flat seventh and flat sixth keeps the descent unambiguously minor. The convention is therefore a description of how a line behaves, not a fixed set of notes belonging to the key.

Jazz players ignore the descending form and use the ascending notes in both directions, a scale usually called jazz minor. The reason is that jazz treats a scale as the vertical content of a chord, not as a rule about direction. Over a minor-major seventh chord, or over an altered dominant, the question is which notes agree with the harmony sounding underneath. Switching to the flat sixth and flat seventh halfway down a line would contradict that harmony. The consistent form also generates the two modes jazz improvisers rely on: the fourth mode, Lydian dominant, and the seventh mode, the altered scale. For the modes of the major scale, see the seven modes compared.

Which Minor Scale to Reach For

The practical habit behind all of this is to stop thinking of three scales and start thinking of one minor key with two adjustable degrees. Composers do not switch scales, they raise or lower the sixth and seventh as the line and the chord require. The three names are simply labels for the three settings that come up most often.

Every Minor Scale, Key by Key

A reference index. Each key links to a full page for that scale with its notes, fingering and diatonic chords.

Natural minor: A, E, B, F♯, C♯, G♯, D, G, C, F, B♭, E♭

Harmonic minor: A, E, B, F♯, C♯, G♯, D, G, C, F, B♭, E♭

Melodic minor: A, E, B, F♯, C♯, G♯, D, G, C, F, B♭, E♭

For every other scale on the site, including the modes and the pentatonics, start from the complete scale reference.