Circle of fifths

Start by choosing a key on the outer ring. Select C major and check the 0 accidentals. The tool shows the C major scale, its relative A minor, the neighboring F major and G major keys, and the seven diatonic chords: C, Dm, Em, F, G, Am, and B°.

Try a 60-second exercise. Play the C chord first. Then activate the scale and sing or play each note in order. Finally, play C, F, and G on your instrument. You will hear the difference between the point of rest, preparation, and tension within the same key.

Next, compare the result with the inner ring. When you select A minor, you find the same key signature as C major because the two keys are relative. The tool lists the A minor chords as Am, B°, C, Dm, Em, F, and G. It also shows the harmonic V: E. This detail appears when the fifth degree receives the alteration needed to function as a major dominant.

On guitar, keep the instrument beside the widget and look for the positions of the indicated chords. Play only the root, third, and fifth if you want to hear the structure without forming a complete shape. On keyboard, play the scale with your right hand at 60 BPM and try the chord roots with your left hand. This way, you turn the list into sound before trying to memorize the names.

If you are checking a chord chart for pop, rock, country, folk, or worship music, list the chords used and compare them with the key segment. In a progression with C, G, Am, and F, for example, C major is a straightforward possibility. Confirm it by playing C at the end of the phrase and noticing whether it conveys a sense of rest.

The circle of fifths gets its name because each clockwise step moves up a perfect fifth, or 7 semitones. Starting from C, you reach G; from G, D; from D, A. The full sequence moves through C, G, D, A, E, B, F#/G♭, D♭, A♭, E♭, B♭, and F before returning to C.

This arrangement places keys that share many notes close together. C major and G major differ by only one scale note: F in C major becomes F# in G major. G major and D major also differ by one note in the key signature: D adds C#. This pattern helps explain why a key change can sound natural in an introduction, chorus, or at the end of a song.

That is why G major has 1 sharp, F#; D major has 2, F# and C#; and A major has 3, F#, C#, and G#. The sequence is not just a list of names. It shows the distance between tonal centers and offers a quick way to transpose a progression without recalculating every chord from scratch.

Counterclockwise, you move down a perfect fifth and add a flat. F major has 1 flat, B♭; B♭ major has 2, B♭ and E♭; and E♭ major has 3, B♭, E♭, and A♭. If a melody sits too high for your voice, try a key one or two counterclockwise positions away and compare the range in which you sing the chorus.

Try the exercise now: play C and G, then C and F. The distance between C and G appears in the clockwise direction. The relationship between C and F appears in the counterclockwise direction. Then play G, D, and A to hear a chain of ascending fifths.

A key signature groups the accidentals that recur in a key. It appears at the beginning of the staff and avoids repeating the same symbol before every note. In a chord chart, you usually find accidentals in chord names; in sheet music, the key signature offers an immediate clue about the scale being used.

The order of sharps is F, C, G, D, A, E, B. So G major has F#; D major has F# and C#; A major has F#, C# and G#; and E major has F#, C#, G# and D#. F# major reaches 6 sharps: F#, C#, G#, D#, A# and E#.

The order of flats is B, E, A, D, G, C, F. It is the order of sharps in reverse. F major has B♭; B♭ major has B♭ and E♭; E♭ major has B♭, E♭ and A♭; and D♭ major has B♭, E♭, A♭, D♭ and G♭. C♭ major uses all 7 flats: B♭, E♭, A♭, D♭, G♭, C♭ and F♭.

When reading a chord chart or sheet music, count the accidentals before looking for the chords. G♭ major has 6 flats: B♭, E♭, A♭, D♭, G♭ and C♭. C major has 0 accidentals. The key signature reduces repeated symbols and offers a clue about the tonal center, but it does not by itself prove that the music stayed in a single key.

To practice, choose D major in the widget and say the two accidentals out loud: F# and C#. Then choose E♭ major and recite B♭, E♭ and A♭. This exercise takes less than a minute and reinforces the order through listening and speaking.

Each major key has a relative minor with the same key signature. C major is related to A minor; G major, to E minor; F major, to D minor. The scale notes are the same, but the sense of resolution changes because the tonic is now a different note.

You can find the relative minor by descending 3 semitones from the major tonic. From C, go down to A; from G, to E; from D, to B. You can also count six scale degrees up within the major scale. In C major, the sixth degree is A, so the relative key is A minor.

The inner ring lets you compare the two keys without doing the math. E♭ major has 3 flats, B♭, E♭, and A♭, and its relative is C minor, also with 3 flats. The chords in E♭ major are Eb, Fm, Gm, Ab, Bb, Cm, and D°. The chords in natural C minor are Cm, D°, Eb, Fm, Gm, Ab, and Bb.

In a minor key, the fifth degree can be altered to create a major dominant. In A minor, the natural diatonic chords are Am, B°, C, Dm, Em, F, and G, but the harmonic V indicated by the tool is E. In G minor, the natural sequence is Gm, A°, Bb, Cm, Dm, Eb, and F, with harmonic V D.

Compare them on your instrument. Play C and then Am while keeping to the white keys on the keyboard. On guitar, alternate between the C and Am chords. The available notes are closely related, but the sense of resolution changes. This contrast helps you recognize a relative minor in a worship, pop, or ballad arrangement.

Neighboring keys occupy positions side by side on the circle of fifths. G major and D major are neighbors because G rises a fifth to D. G major has 1 sharp, F#; D major has 2, F# and C#. The only difference in the key signature is C#.

This closeness explains why a song can move from one key to the other with little preparation. The two scales share 6 of their 7 notes. A melody in G major already contains much of the material from D major. The A chord, with C#, can serve as a clear signal that D has become the tonal center.

In pop, rock, country and worship repertoire, relationships between nearby keys appear in transitions, section endings, and key changes to accommodate the singer's range. This does not mean every move between neighboring keys will be automatic. You still need to check the melody, bass line, and chord that receives the resolution.

Neighboring keys also help you identify the key of a chord chart. If you see many G, C, D, Em, and Am chords, G major is a strong possibility. If you see D, G, A, Bm, and Em, D major may be the center. Play D at the end of the progression. If the chord sounds unresolved, test G and A and listen for which resting note organizes the phrase.

To practice in 1 minute, play G–C–D–G and then D–G–A–D. The degree pattern is similar: I–IV–V–I. The material changes key, but the function of the chords remains the same.

Each position on the circle brings together the key, its relative minor, and the seven chords built on degrees I, ii, iii, IV, V, vi, and vii°. In C major, the chords are C, Dm, Em, F, G, Am, and B°. An uppercase letter indicates a major triad; m indicates minor; and ° indicates diminished.

In G major, the seven chords are G, Am, Bm, C, D, Em, and F#°. In D major, they are D, Em, F#m, G, A, Bm, and C#°. On guitar, select one of these keys and try different combinations across the six strings. On a keyboard, play the root, third, and fifth to hear each triad without relying on a specific position.

The pattern of major triads is I, IV, and V. The pattern of minor triads is ii, iii, and vi. The vii° functions as a diminished chord. In C major, this produces C, F, and G as major chords; Dm, Em, and Am as minor chords; and B° as diminished. This pattern appears in countless popular songs, but the chord order does not always need to follow I–IV–V.

For minor keys, use the corresponding slice of the inner ring. In E minor, the diatonic chords are Em, F#°, G, Am, Bm, C, and D. In B minor, they are Bm, C#°, D, Em, F#m, G, and A. If the song uses B major in E minor, compare it with the harmonic V. The third, D#, creates the strongest pull toward Em.

The chord generator helps you check shapes, inversions, and names as you build the harmonic field. Use it this way: choose a chord from the list, play the suggested position, then compare the same triad in an inversion on the keyboard. You will hear that the notes are the same, but the bass changes the chord's feeling.

Enharmonic equivalence occurs when two spellings represent the same pitch in an equal-tempered system but use different names. On the circle, the three lower positions show these alternatives. F# and G♭ occupy the same position; D♭ and C# do as well; F# and G♭ are at the bottom, in the six o'clock position; D♭ and C#, at seven o'clock; B and C♭, at five o'clock.

F# major has 6 sharps: F#, C#, G#, D#, A# and E#. G♭ major has 6 flats: B♭, E♭, A♭, D♭, G♭ and C♭. The tool displays the chords of F# major as F#, G#m, A#m, B, C#, D#m and E#°. In G♭ major, they are Gb, Abm, Bbm, Cb, Db, Ebm and F°.

The E# in F# major sounds like F on the keyboard, but it is named E# because the seventh degree must remain some type of E. The same reasoning explains the Cb in G♭ major: it sounds like B, but preserves the position of the letter C in the scale. This spelling matters when reading and analyzing scale degrees.

D♭ major has 5 flats: B♭, E♭, A♭, D♭ and G♭. Its enharmonic spelling is C# major, with 7 sharps: F#, C#, G#, D#, A#, E# and B#. In practice, D♭ major is usually easier to read for repertoire with flats. C# major can make sense when a passage already uses sharps or when the analysis maintains the same spelling as neighboring keys.

Try it on the virtual keyboard: play F# and G♭ in the same register and compare the sound. Then observe the names in the tool. The sound matches, but the choice of spelling changes how the chords and scale are read.

To transpose a song from G to D, move up a fifth and go one step clockwise. The relationship between keys makes it easier to change the key for a lower or higher vocal range. If the original form uses G, C, and D, think in terms of scale degrees I, IV, and V. In D major, the same functions become D, G, and A.

If you need to lower the song from G to F, move one step counterclockwise. G, C, and D become F, Bb, and C. The distance between the chords stays the same, but the range changes. For a voice that reaches G4 with effort in the chorus, transposing to F major lowers the highest note by 2 semitones, to F4. Check the melody within your own range before choosing the final key.

On guitar, the circle helps you choose a key that works with open chords and a capo. You can keep familiar shapes, place the capo at the right fret, and check the actual key on the circle. If you play G shapes with a capo at the 2nd fret, the actual sound is A major. Write down this difference so you do not confuse the visual shape with the key the audience hears.

To understand the I–IV–V progression and the ii–V–I progression, notice that the scale degrees involved are directly related within the key. In C major, I–IV–V is C–F–G. The ii–V–I progression is Dm–G–C. Play each sequence at 72 BPM and allow two beats for each chord. Then transpose the pattern to G major: G–C–D and Am–D–G.

To find the key of a chord chart, list the chords it uses and compare them with the seven chords in the segment. Then sing or play the chord that seems to feel like home. A chord chart with A, D, E, and F#m suggests A major, but you still need to confirm whether A works as the point of arrival. The final chord helps, but the melody may point to the relative key of F# minor.

On a keyboard, the virtual piano lets you test notes and chords. When you decide to play along with a recording in a new key, open the file you already have in the Studio to change a song’s key: moving from G major to A major is 2 semitones, and the circle tells you in advance which chords you will find there — A, Bm, C#m, D, E, F#m, and G#°.

The circle also helps you create progressions and follow music scale studies. Choose a tonic, combine I, vi, IV, and V, and record a short sequence on your instrument. In C major, try C–Am–F–G; in G major, G–Em–C–D. You will be keeping the same relationship between scale degrees in another key.

It does not choose a composition for you, but it shows harmonic paths you can experiment with. If you are just starting, consult music theory for beginners and return to the widget to connect each concept with a specific key. Set aside 5 minutes: 1 minute to choose the key, 2 to play the scale, 1 to play the chords, and 1 to write down what sounded most stable.

• Move clockwise to ascend by fifths and add sharps; move counterclockwise to descend by fifths and add flats.
• Use the inner ring to find the relative minor key and compare the same key signature.
• Read the seven chords in the order I, ii, iii, IV, V, vi, and vii° to build diatonic chord progressions.
• Compare neighboring keys when transposing, choosing chords for guitar, or checking the key of a chord chart.
• Use the order F, C, G, D, A, E, B for sharps and B, E, A, D, G, C, F for flats.
• Play the tonic, scale, and chords in the widget before taking the idea to your instrument.
• In a minor key, compare the natural fifth degree with the harmonic V chord, such as Em and E in A minor.

Final exercise: select C major, play C–F–G–C, find A minor on the inner ring, and play Am–Dm–E–Am. Then move to G major and repeat the pattern. In under 3 minutes, you will have practiced key, relative minor, dominant, and transposition.