Flute Tuner
Tune your flute online with your microphone: play a long, steady note and see how many cents you are flat or sharp. The flute is a C instrument, so the note you read is the note you hear. Most bands tune to A or B♭.
Press Start and allow the microphone
Your browser will ask to use the microphone. Choose Allow.
✓ All strings in tune
Tap a string to hear it and tune only that string. Audio is analysed on this device and never uploaded. How it works →
- What it does
- Shows the note you play, its Hz and cents
- What it does not do
- Record or upload audio · detect chords
- Reference pitch
- A4 = 440 Hz, adjustable 415–466 Hz
- Tested with
- 58 studio recordings of 11 instruments (right note on about 95% of frames at normal volume) and test tones from B0 to C6
- Made by
- The Appcellent team
- Updated
- November 2026
Tuner not hearing you?
- Allow the microphone. If you blocked it: in Chrome or Edge, click the icon left of the address bar → Microphone → Allow, then reload. In Safari on iPhone, tap aA → Website Settings → Microphone → Allow. In Firefox, click the crossed-out microphone in the address bar. On a Mac, also check System Settings → Privacy & Security → Microphone for your browser.
- Open the page in Safari or Chrome. In-app browsers (Instagram, Facebook, TikTok) often block the microphone.
- Play one note at a time, louder. Point the microphone toward the bell or the instrument from about an arm’s length. A quiet room helps.
- Wrong octave or jumping notes? Let the attack fade for a moment — the reading settles once the note is steady.
- No microphone at all? Tap a reference note button to hear its note and tune by ear.
Flute tuning notes
Reference notes at A4 = 440 Hz. Tap a note under the tuner to hear it.
| Concert pitch | Frequency |
|---|---|
| A4 | 440.00 Hz |
| B♭4 | 466.16 Hz |
How to tune your flute
- Warm up for a minute first — a cold flute plays flat.
- Press Start tuner and play a long A or B♭ at a comfortable volume.
- If you are sharp, pull the headjoint out a little. If you are flat, push it in.
- Check a few other notes across the range, then mark the headjoint position.
Why your flute is out of tune
Pitch depends on temperature, how hard you blow and how much the lip covers the embouchure hole. Blowing harder or rolling out raises the pitch; rolling in lowers it. Tune with your normal playing tone, not a soft or forced one.
Questions
What note should I tune my flute to?
A (440 Hz) or B♭ are the usual tuning notes. Follow your band or orchestra.
How do I make my flute less sharp?
Pull the headjoint out slightly from the body, then check again.