Guitar Chord & Music Key Transposer
Transpose guitar chords, musical keys, and chord progressions across semitones and capo fret positions with diatonic scale degrees.
Key & Progression Setup
Diatonic Scale Degrees & Chord Comparison
About this tool
How to use it
- Select your original musical key and target destination key, or pick a standard chord progression preset (Pop, Doo-Wop, Jazz 2-5-1, Blues, or Canon).
- Optionally choose a guitar capo fret position (Fret 1 through 7) to find open chord shapes that match your target pitch.
- Type or paste your chords into the chord box (supports major, minor, 7ths, maj7, suspended, diminished, and slash bass chords like G/B).
- Read the transposed chord progression, semitone shift interval, capo fingerings, and diatonic scale degree comparison table.
Why it matters
Transposing songs to fit a singer's vocal range or replacing difficult barre chords with comfortable open shapes often leads to confusing accidental errors (# vs b). This tool handles chromatic pitch transposition, preserves chord extensions and slash chords, and computes exact capo fret positions.
When to use it
Use when learning a new song on guitar, accommodating a vocalist who needs a song raised or lowered by a few half-steps, or collaborating with keyboardists and brass players who read in concert pitch.
Good to know
Enharmonic note spelling (e.g. F# vs Gb) defaults to standard circle-of-fifths key signatures but can be manually overridden to force sharps or flats.
Common questions
How do I transpose guitar chords to use a capo?
Select your desired sounding target key, then choose a Capo fret position in the dropdown. The tool will calculate the lower open chord shapes you should finger on the fretboard so that the capo raises the pitch back to your target key.
Can I transpose complex chord extensions like 7ths, sus4, and slash bass notes?
Yes. The parser recognizes chord qualities such as m, maj7, 7, m7, sus2, sus4, dim, aug, and m7b5, as well as slash bass notes (e.g. C/E or G/B). Both the root note and the bass note are transposed by the exact same interval.
What is the difference between sharp (#) and flat (b) keys?
Sharps and flats are enharmonically equivalent in pitch on modern 12-tone equal temperament instruments. However, standard musical notation assigns sharps to keys like G, D, A, and E Major, and flats to keys like F, Bb, Eb, and Ab Major to ensure every letter name appears once per scale.
How many semitones do I transpose to go from G Major to C Major?
Transposing from G Major to C Major is an upward shift of 5 semitones (or a downward shift of 7 semitones). For example, a G - Em - C - D progression becomes C - Am - F - G.
What are the Roman numerals in the diatonic scale comparison?
Roman numerals represent diatonic chord scale degrees. Uppercase numerals (I, IV, V) represent major chords, lowercase numerals (ii, iii, vi) represent minor chords, and vii° represents the diminished chord built on the 7th scale degree.