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Reference
Interval Reference
All 12 intervals — fretboard positions relative to root. From Guitar Atlas.
All 12 intervals from Guitar Atlas page 11. Each shows its fretboard position relative to a root note on a 2-string window.
R0 semitones
Unison
Octave
perfect
♭21 semitone
Minor 2nd
minor
22 semitones
Major 2nd
major
♭33 semitones
Minor 3rd
minor
34 semitones
Major 3rd
major
45 semitones
Perfect 4th
perfect
♭56 semitones
Tritone
Aug 4th / Dim 5th
diminished
57 semitones
Perfect 5th
perfect
♭68 semitones
Minor 6th
Aug 5th
minor
69 semitones
Major 6th
major
♭710 semitones
Minor 7th
minor
711 semitones
Major 7th
major