Chordz - Calculate Chords

Choose your root note and chord progression to see the complete breakdown:

Root Note:

Chord Progression:

Examples: I-IV-V, vi-IV-I-V, i-VI-III-VII (lowercase = minor)

💡 Quick Tips

Uppercase = Major, Lowercase = Minor: Use uppercase Roman numerals (I, IV, V) for major keys, lowercase (i, iv, v) for minor keys
Auto-detection: The scale type is automatically detected from your first Roman numeral
Natural chords (I, ii, iii, IV, V, vi, vii°) use skip-pick-skip-pick from your scale
Borrowed chords (like VI instead of vi) use interval formulas and will be highlighted in orange
Start simple: Try I-V-vi-IV in C, or i-VI-III-VII in A - both use all white keys!
Common major progressions: I-V-vi-IV, I-IV-V, vi-IV-I-V
Common minor progressions: i-VI-III-VII, i-iv-VII-VI, i-VI-VII