Free Online Flute Tuner
Play a note — see exactly how in tune you are.
Allow microphone access to begin
How to use this tuner
Click Start Tuning and allow microphone access. Play a note — the tuner detects pitch in real time and shows how sharp or flat you are in cents.
The bar spans −50 to +50 cents. Zero is perfectly in tune. The history line shows where you’ve been — useful for spotting whether upper-register notes consistently run sharp or whether pitch drifts as air speed varies.
Concert Pitch is selected — no transposition needed for flute. The note shown is exactly the pitch the ensemble hears. For piccolo or alto flute, select the appropriate instrument from the dropdown.
Default is A440. Tap + / − to match your ensemble — A441–442 is common in orchestras, A415 for historical pitch.
The flute plays at concert pitch — no transposition. Flute intonation is controlled almost entirely through embouchure: the angle of the air stream across the embouchure hole, how much of the hole is covered by the lower lip, and air speed. Rolling the headjoint inward (covering more of the embouchure hole) lowers pitch; rolling outward raises it. High notes tend sharp when overblown and benefit from a more focused, slightly faster air stream at a lower angle; low notes go flat with insufficient air or an overly relaxed embouchure aperture. The third octave — particularly high C, D, and above — requires an adjusted embouchure shape that can introduce pitch inconsistencies until the technique is stable. Temperature affects the flute significantly: a cold headjoint plays flat, which is why blowing warm air into the tube before tuning matters. The headjoint cork position controls overall pitch range; pull it slightly out to lower pitch, push in to raise. The pitch history display makes register drift visible — whether your second octave consistently sits above your first, or whether specific notes spike sharp before settling.
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