Chord TheoryLevel 4 — Roman Numerals

The I-IV-V Progression

Understand the three most important chords in any major key using Roman numerals.

Start Lesson in Chord8 →

Instructions

  1. Set Level 4 on Guitar. Select C Major chord.
  2. Set the key to C Major (tap "Set Key" in the display settings).
  3. Look at the Roman numeral row — C is labeled "I" (the one chord).
  4. Click "IV" in the Roman numeral row to select F Major — the four chord.
  5. Click "V" to select G Major — the five chord. I-IV-V = C-F-G in the key of C.
  6. Add C Major, F Major, and G Major to the Chord8 practice loop, then play the I-IV-V sequence until you can hear each function.
TIP

The I-IV-V progression works in every key. In G major: I=G, IV=C, V=D. In D major: I=D, IV=G, V=A.

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