The circle of fifths explained simply
The circle of fifths arranges the 12 keys like a clock. Learn to draw it, read key signatures and relative minors with it, and use it in practice.
The circle of fifths is a diagram that arranges the 12 major keys like the hours on a clock. C sits at the top; each clockwise step moves up a perfect fifth (C, G, D, A, E…) and adds one sharp to the key signature. Going the other way (F, B♭, E♭…), each step adds one flat. The relative minor keys go in an inner ring.
It has three very practical uses: knowing which sharps or flats belong to each key, finding chords that sound good together, and transposing a song without getting lost. Here, we explain how to draw it and use it.
In short
- Moving clockwise, each key is a perfect fifth above the previous one and has one more sharp.
- Moving counterclockwise, each key is a fifth below the previous one and has one more flat.
- Order of sharps: F, C, G, D, A, E, B. Flats follow the reverse order.
- Each major key shares a key signature with its relative minor, three half steps below.
- The main chords in a key (I, IV and V) are the chord of that key and those of its two neighbors on the circle.
What the circle of fifths is and how to draw it
A perfect fifth spans seven half steps, as between C and G: counting both endpoints, C-D-E-F-G gives you five notes. Repeat that leap twelve times and you pass through all twelve notes before returning to C. The circle maps that journey. If the idea of distance between notes is new to you, start with what a musical interval is.
- Draw a clock and write C at 12.
- Move clockwise, going up a fifth at each hour: G (1), D (2), A (3), E (4), B (5).
- At 6, write F♯ / G♭: the same key can have two names.
- Return to C and move counterclockwise, going down a fifth each time: F (11), B♭ (10), E♭ (9), A♭ (8), D♭ (7).
- Inside the circle, write each major key’s relative minor beside it: A minor beside C, E minor beside G, D minor beside F, and so on.
Drawing it from memory once a day for a week is the quickest way to stop needing a paper copy.
Key signatures on the circle of fifths
| Position | Major | Relative minor | Key signature |
|---|---|---|---|
| 12 | C | A minor | No sharps or flats |
| 1 | G | E minor | 1 sharp: F♯ |
| 2 | D | B minor | 2 sharps: F♯, C♯ |
| 3 | A | F♯ minor | 3 sharps: F♯, C♯, G♯ |
| 4 | E | C♯ minor | 4 sharps: F♯, C♯, G♯, D♯ |
| 5 | B | G♯ minor | 5 sharps: F♯, C♯, G♯, D♯, A♯ |
| 6 | F♯ / G♭ | D♯ minor / E♭ minor | 6 sharps (F♯ major) or 6 flats (G♭ major) |
| 7 | D♭ | B♭ minor | 5 flats: B♭, E♭, A♭, D♭, G♭ |
| 8 | A♭ | F minor | 4 flats: B♭, E♭, A♭, D♭ |
| 9 | E♭ | C minor | 3 flats: B♭, E♭, A♭ |
| 10 | B♭ | G minor | 2 flats: B♭, E♭ |
| 11 | F | D minor | 1 flat: B♭ |
Sharps always appear in the same order: F, C, G, D, A, E, B, each a fifth above the previous one, just as on the circle. Flats go in reverse: B, E, A, D, G, C, F. There are also C♯ major (7 sharps) and C♭ major (7 flats), which sound the same as D♭ and B, respectively.
Two quick ways to read a key signature
- With sharps: the last sharp is the leading tone; the tonic is a half step above it. With three sharps, the last is G♯, so the key is A major.
- With flats: the second-to-last flat is the tonic. With B♭, E♭ and A♭, the second-to-last is E♭: E♭ major. The only one you need to memorize is F major, which has just one flat.
Relative keys: major and minor with the same key signature
Each key signature serves two keys: a major key and its relative minor, which is three half steps lower and uses the same notes. With no sharps or flats, it could be C major or A minor; with one sharp, G major or E minor. We explain this in detail in major and minor scales.
How can you tell which of the two it is? Musicians use three clues:
- Look at the last melody note and the last bass note: they are almost always the tonic.
- Look for accidentals: if G♯ keeps appearing in a piece with no sharps or flats in its key signature, it is the leading tone of A minor.
- Listen to the overall mood and the opening chord: they usually confirm what the first two clues suggest.
How to find the chords in a key
This is where the circle becomes practical. Find your key: that gives you the I chord. Its neighbor on the right is V (dominant), and its neighbor on the left is IV (subdominant). Their relative minors give you vi, iii and ii. Those six chords form the basis of a huge number of songs.
| Key | IV – I – V | ii – vi – iii (relative minors) |
|---|---|---|
| C major | F – C – G | Dm – Am – Em |
| G major | C – G – D | Am – Em – Bm |
| D major | G – D – A | Em – Bm – F♯m |
| A major | D – A – E | Bm – F♯m – C♯m |
That is why G – D – Em – C sounds so natural: these are I, V, vi and IV in G major, all neighbors on the circle. You can play it using basic guitar chords. The missing chord, built on the 7th degree, is diminished and used less often.
With those chords you already have material to write with: how to write a song from scratch shows you how to go from a progression to a complete song.
Other practical uses for the circle of fifths
- Transposing: if a song in E (E – A – B) is too high for you to sing, lower it to D: the pattern of neighbors stays the same, giving you D – G – A.
- Understanding modulation: neighboring keys differ by just one note (C and G differ only in F and F♯). That is why moving between them sounds so smooth.
- Progressions by fifths: the familiar ii – V – I (in C: Dm – G – C) moves counterclockwise around the circle. Longer sequences, such as E – A – D – G – C, appear in many boleros and jazz standards.
- Organizing scale practice: following the circle adds one new sharp or flat each time.
- Understanding your instrument: the guitar’s open strings make sharp keys (E, A, D, G) comfortable to play; wind bands often play in flat keys (B♭, E♭, F) because many of their instruments are pitched in B♭ or E♭.
Exercises to learn it by heart
- Draw the whole circle from memory, including relative minors, and compare it with the table.
- Ask someone to name a random key and say its key signature aloud. Then reverse the exercise: key signature first, then key.
- Play the I – IV – V – I cadence in every key, moving around the circle.
- Take a song you know and transpose it to both neighboring keys.
In music theory lessons, you work through these exercises on your instrument using actual repertoire. That is where the circle becomes a tool you can use.
Frequently asked questions
Why is it called the circle of fifths rather than fourths?
Because each clockwise step goes up a fifth. Going the other way, each step goes up a fourth, which is why some jazz musicians call it the circle of fourths. It is the same diagram viewed from the other direction.
Which keys should you learn first?
Those with few sharps or flats: C, G, F and D, along with their relative minors. Then learn the ones your instrument uses most: E and A on guitar; B♭ and E♭ on wind instruments.
What are enharmonic keys?
They are keys that sound the same but are written differently, such as F♯ major (six sharps) and G♭ major (six flats). They appear at the bottom of the circle, where the sharp and flat sides meet.
Can you use the circle of fifths to compose?
Yes. It shows which chords belong to the key, which neighboring keys allow modulation and which bass movements sound strongest. It does not compose for you, but gives you a map for trying ideas with purpose.
Sources
We checked the facts in this article against these sources on October 22, 2026.