The Whole Horn
The Whole HornTransposition › Flute
Transposition · Woodwind

What key is the flute in?

Quick answer. The flute is in C — it is a non-transposing, concert-pitch instrument. A written C sounds concert C. Nothing has to be worked out: when your band director calls “concert B♭,” the flute reads and plays a written B♭. It is reading the same pitch as the piano, the oboe and the trombone.

What that means on the page

A transposing instrument is one whose written notes do not match the concert pitch that sounds. The flute is not one of them. Read a written C and the audience hears concert C — the two are the same thing.

Instruments that read at concert pitch are sometimes called “C instruments,” and they are the ones a pianist can read alongside without converting anything.

Concert pitch to what the flute reads

For a concert-pitch instrument the table is the least interesting one in the band, and that is exactly the point — every row is the same note twice:

When the director says “concert ___,” the flute reads and plays:
Concert pitch (sounds)Flute reads
Concert B♭B♭
Concert E♭E♭
Concert FF
Concert CC
Concert A♭A♭
Concert GG
Concert DD

This is why the flute is the instrument a director will ask to sound a tuning note or demonstrate a passage: what it plays is what everyone else has to match, with nothing to convert.

Why the flute is written this way

The flute is a concert-pitch instrument, so there is nothing to work out: a written C is concert C. The alto flute in G and the bass flute in C an octave lower are the transposing members of the family, but the ordinary C flute every band player holds is not one of them.

Written range

The standard written range of the flute is B3 to C7, written and sounding the same. That is the range parts are scored in and the range these pages and the app both use.

Why this matters for practice

The flute reads at concert pitch, which makes it the reference the rest of the band tunes and transposes against. The fastest way to build fluency is to practise the twelve major scales in the instrument’s own written pitch, hearing each note as it truly sounds. See the flute scale-practice page, or read the method behind mastering all twelve keys.

Frequently asked

What key is the flute in?

The flute is in C. It is a concert-pitch instrument, so a written C sounds concert C.

Is the flute a transposing instrument?

No. Written pitch and sounding pitch are the same, so no transposition is needed to play from a concert-pitch part.

What does the flute play for “concert B♭”?

A written B♭ — the same note the director names, because the flute reads at concert pitch.

Can the flute read piano music?

Yes, as far as pitch goes: piano music is written at concert pitch and so is the flute part. Only the range and the clef need checking.

What is the range of the flute?

The standard range is B3 to C7, written and sounding the same.

Practice every key in your instrument’s pitch.

The Whole Horn plays all twelve major scales in the flute’s own pitch, with the fingering for every note.

Get the app → The full transposition chart

By Thomas Hornig — Henri Selmer Paris artist · Professor of Saxophone, Lebanese National Higher Conservatory of Music.
Related: Vibrato Practice — free vibrato trainer · Flute scale practice · The full band transposition chart · The method · Flute range