Transposition Calculator

Convert notes and keys between concert pitch and B♭, E♭, F and A instruments instantly.

From To

Notes or chords (e.g. C D E F G, Bb Eb F7, F#m7 B7 Emaj7)

Result

Key signature major

How transposition works

A transposing instrument reads notes a fixed interval away from the sounding pitch. To find what a B♭ clarinettist should read for a concert part, raise everything a major second (2 semitones); for alto saxophone raise a major sixth (9 semitones); for horn in F a perfect fifth (7 semitones). The calculator applies the difference between the two instruments' transpositions and spells the result with sensible sharps or flats.

See the full transposition chart or read transposing instruments, explained.