Circle of Fifths — Interactive Wheel & Guitar Guide

The circle of fifths is a wheel that organises all twelve major keys in a ring, each a perfect fifth above the last. Keys that sit next to each other share nearly all their notes, so the diagram answers three practical questions at a glance: how many sharps or flats a key has, which minor key goes with each major, and which chords sound at home together. Click any segment of the wheel above to select a key — the readout shows its signature and its seven diatonic chords, and every chord plays when you click it.

Printable PDF: Download the circle of fifths chart — twelve major keys on the outer ring, relative minors inside, and every key signature on one print-friendly page.

How to read the wheel

Start at the top with C major: no sharps, no flats. Move clockwise and each step adds one sharp — G has one (F♯), D has two (F♯, C♯), A three, E four, B five — until F♯/G♭ at the bottom with six. Move anticlockwise from C instead and each step adds one flat — F has one (B♭), B♭ has two, E♭ three, A♭ four, D♭ five. The bottom of the wheel is where the two sides meet: F♯ major (six sharps) and G♭ major (six flats) sound identical and are written as one segment with both names.

The inner ring holds the relative minors. Every major key shares its key signature with exactly one minor key, built from the sixth degree of its scale. C major pairs with A minor, G major with E minor, F major with D minor, and so on around the ring. Selecting an inner segment switches the tool to that minor key and rebuilds the chord list around the natural minor pattern instead.

Two habits make the wheel stick. First, notice that neighbours differ by exactly one accidental: C–G differ only on F vs F♯, G–D only on C vs C♯. Modulation between adjacent keys therefore sounds smooth, which is why songs drift to the next segment for a lift. Second, opposite sides of the wheel are the most distant keys — C major and F♯/G♭ major share almost nothing — so jumping across the wheel sounds dramatic and needs careful handling.

Every key at a glance

Major	Relative minor	Sharps	Flats
C	Am	0	0
G	Em	1 (F♯)	0
D	Bm	2 (F♯, C♯)	0
A	F♯m	3 (F♯, C♯, G♯)	0
E	C♯m	4 (F♯, C♯, G♯, D♯)	0
B	G♯m	5 (F♯, C♯, G♯, D♯, A♯)	0
F♯ / G♭	D♯m / E♭m	6	6
D♭	B♭m	0	5 (B♭, E♭, A♭, D♭, G♭)
A♭	Fm	0	4 (B♭, E♭, A♭, D♭)
E♭	Cm	0	3 (B♭, E♭, A♭)
B♭	Gm	0	2 (B♭, E♭)
F	Dm	0	1 (B♭)

Guitarists meet the sharp side first — G, D, A and E are the open-chord keys — while flat keys like B♭ and E♭ turn up wherever horns and keyboards lead. The wheel above spells every chord to match its key, so B♭ major’s chords read with flats (B♭, Cm, Dm, E♭) rather than awkward sharp equivalents.

Diatonic chords: the families every key owns

Each key contains seven chords built from its own scale, with qualities that never change. In a major key the pattern is I–ii–iii–IV–V–vi–vii° (major, minor, minor, major, major, minor, diminished). Here it is for C major, the key with no accidentals to hide behind:

Chord	Notes	Quality	Role
C (I)	C E G	Major	Tonic — home
Dm (ii)	D F A	Minor	Supertonic
Em (iii)	E G B	Minor	Mediant
F (IV)	F A C	Major	Subdominant
G (V)	G B D	Major	Dominant — pulls home
Am (vi)	A C E	Minor	Submediant — the relative minor
Bdim (vii°)	B D F	Diminished	Leading tone — tense, resolves up

The minor pattern, shown here for A minor, is i–ii°–III–iv–v–VI–VII:

Chord	Notes	Quality	Role
Am (i)	A C E	Minor	Tonic — home
Bdim (ii°)	B D F	Diminished	Supertonic
C (III)	C E G	Major	Mediant
Dm (iv)	D F A	Minor	Subdominant
Em (v)	E G B	Minor	Dominant (natural minor keeps it minor)
F (VI)	F A C	Major	Submediant
G (VII)	G B D	Major	Subtonic

Compare the two tables and a useful truth falls out: C major and A minor contain exactly the same seven chords in a different order. That is what “relative” means in practice — the same material, a different home. Select C on the wheel, play I–vi–IV–V (C–Am–F–G), then flip to the relative minor and hear how Am–F–C–G leans on the same chords with a darker centre of gravity.

How guitarists actually use it

Finding a song’s key. Most pop, rock, folk and country songs live on three or four neighbouring chords. If you hear G, C, D and Em, the wheel confirms all four belong to G major — G is I, C is IV, D is V, Em is vi. That single lookup replaces guessing through all twelve keys, and it tells you the seventh chord (F♯dim) is the one to avoid unless you want tension.

Transposing with a capo. Suppose a song in G uses G–C–D–Em but the singer needs it a whole step higher, in A. A capo on fret 2 with the same G shapes does it — and the wheel explains why the result is correct: G major and A major are neighbours, so every shape keeps its function (I stays I, IV stays IV). Transposing up a fifth works the same way: capo 7 turns G shapes into D shapes, one more step clockwise.

Chord families and common progressions. The progressions guitarists play most are wheel neighbours. I–V–vi–IV in G is G–D–Em–C: open G and C shapes, a D that rings against them, and Em as the soft centre. I–vi–IV–V (G–Em–C–D) is the same family reordered. The 12-bar blues in A (A–D–E) is I–IV–V with dominant sevenths, and the Andalusian i–VII–VI–V in E minor (Em–D–C–B) walks down the minor side. The Set on the fretboard button below opens the Virtual Guitar Lab, so you can move from hearing the family to fretting it with real voicings. For the shapes themselves, the beginner chords guide and the printable chord chart cover fingerings in detail, including the F barre and B minor shapes beginners meet first. The Progressions group below the chord buttons plays three of these loops — a pop I–V–vi–IV in G, a jazz ii–V–I in C with seventh-chord colours, and a 12-bar blues in A — using the same guitar voice and highlighting each chord as it sounds; picking another key stops the loop.

Writing bridges and key changes. A bridge that moves one segment clockwise (say, from a G-major verse to a D-major lift) adds exactly one new sharp and sounds like sunrise. Moving to the relative minor darkens a bridge without changing the signature at all. Both moves are visible on the wheel before a single note is played.

Circle of fifths piano

Everything above holds on piano, and pianists get one extra visual gift: the circle of fifths piano layout maps directly onto key colour. C major is all white keys. Each clockwise step adds one black key (G needs F♯, D needs F♯ and C♯), and each anticlockwise step trades a white key for a flat. That is why piano teachers introduce G and F before D and B♭ — the hand learns one black key at a time. Try the same key on both instruments: select D major here, play its I–vi–IV–V, then find those chords on the Virtual Piano and feel how the two-sharp signature sits under the fingers.

Circle of fifths bass clef

Bass lines love fifths because the interval is stable under almost any chord: root–fifth movement (C–G, A–E) anchors the harmony without cluttering it. The wheel is literally a map of those jumps — every clockwise step is the fifth above. Walking roots around the wheel (C–G–D–A–E…) is a standard fingerboard drill. When reading standard notation, using the circle of fifths bass clef key signatures works identically to treble clef, so the readout above functions as printed. Tune up with the online guitar tuner first if you are on a bass with guitar-style machine heads, and keep time with the metronome while drilling the cycle at 60 BPM.

Practise routine and printable chart

A ten-minute routine with the wheel above: pick a major key, play its I–IV–V slowly, then its vi and ii, naming each roman numeral aloud; flip to the relative minor and repeat i–VI–VII; move one segment clockwise and start over. Two weeks of that across the sharp-side keys (C, G, D, A, E) teaches transposition by ear rather than by memorised shapes.

Download the printable PDF to keep the wheel on your music stand: twelve majors outside, relative minors inside, every key signature on one page. Pair it with the fretboard map in the fretboard notes guide when you are ready to connect each key to its positions on the neck.

Related tools

• Virtual Guitar Lab — fret the chords from any key on a playable neck
• Guitar Tuner — standard EADGBE tuning before you practise
• Virtual Piano — hear the same keys and signatures on keys
• Metronome — keep steady time while drilling key changes