Chord formula
ii-V-I
Canonical guitar progression
ii-V-I is the classic cadence where the ii chord leads to the dominant V and resolves to I. On guitar it sounds smooth and directional, especially with minor 7, dominant 7, and major 7 voicings. Players use it to learn jazz harmony, turnarounds, and clean voice leading.

ii-V-I is useful theory and practice material, but it is not a four-chord StrumForge loop by itself. Use the chord family below to build a related four-slot exercise.
ii-V-I
Dm-G-C
Am-D-G
Jazz, soul, lofi, bossa, pop turnarounds
Intermediate
Use StrumForge to build a related four-slot loop from these chords. The exact ii-V-I idea is a 3-chord concept.
Use these keys as practical guitar starting points. Minor-key rows show the same sound from a minor center where appropriate.
| Key | ii | V | I |
|---|---|---|---|
| C Major | Dm | G | C |
| G Major | Am | D | G |
| D Major | Em | A | D |
| A Major | Bm | E | A |
| E Major | F#m | B | E |
| F Major | Gm | C | F |
| A Minor | Dm | G | C |
| E Minor | Am | D | G |
| D Minor | Gm | C | F |
Open chords usually sound wider and are best for acoustic strumming. Barre chords make the formula movable when the singer needs another key. Capo versions keep familiar C, G, D, A, or E shapes while changing pitch. Beginners should simplify the hardest chord first, often with a partial F, a three-string triad, or a power chord version.
Try Am-D-G or Dm-G-C first if the chords sit well under your fingers.
Use E-shape and A-shape barre chords when you need the same formula in keys that are not open-chord friendly.
Move the capo until the open-shape version supports the vocal range, then keep the same relative chord movement.
Play the top three or four strings of difficult chords and keep the strum hand in time before adding full grips.
Start at 60-90 bpm with one chord per bar, then try two beats each on ii and V.
Use ii-V-I at the end of a section, as a turnaround, or as a bridge color. Melody lines should target the third or seventh of each chord first.
For a verse, use a smaller voicing, fewer strums, or a lower register so the melody has room. For a chorus, widen the voicing, move up the neck, or increase the rhythmic density. The mood is resolved, smooth, cadential, but rhythm and register can push it brighter or darker.
A strong melody usually targets chord tones at chord changes. Hum one phrase over the first two chords, answer it over the second half, then change only the ending note if the loop feels too predictable.
StrumForge uses four chord slots, so use this page as a theory reference and build a related four-chord practice loop from the same chord family.
Short answers for players using this page as a practice or writing reference.
In C, the core chords are Dm, G, C. In G, they are Am, D, G.
It is better after basic open chords because some versions use barre or seventh-chord grips. Slow the hardest transition before adding rhythm.
Start in G, C, D, A, or E if you want open guitar shapes. Move the key or add a capo when the vocal range matters more than the original shapes.
Many songs use the same harmonic type without copying the same voicings or rhythm. Treat the progression as a shared chord-function pattern, then make the rhythm, melody, and arrangement your own.
Change one variable at a time: use triads higher on the neck, add sus or seventh colors, change the strum pattern, add a passing bass note, or move the capo to keep open strings ringing.