Any instrument or voice
Chromatic tuner.
A chromatic tuner for any instrument or voice: it shows the nearest note and how far off you are, at any A4.
Tuner · Any tuning
Tune any note.
Pluck a string and the meter shows how far off it is. Tap any string to hear it at its true pitch and tune by ear.
- Pick any instrument and tuning
- Shift it down or up by half steps
- Set A to anything: 440, 432, 442…
Any note, any instrument or voice
Check string tension →The sound never leaves your device.
Keys: Space start or stop · ← → half step · ↑ ↓ A (Shift: bigger steps) · 1–9 string · M mode · R hear · − + volume · L copy link · Esc done
Ready
Any instrument or voice
Strings 1 → 6
3 times each
Tap Start, then play or sing a note.
Your browser asks once · nothing is recorded
Strings · tap to hear
Instrument
Try uke, bari, 5 string, cello…
Tuning
E Standard (E2)
Shape
Shift
Standard pitch
Higher or lower
Fine-tune
Moves every string a little, for example to match a recording.
Custom tuning
Any strings, any notes
One row for each string. The top row is the top string, usually the thickest.
Start from
Strings
+ adds a lower string at the top. − takes the top string away.
Notes from C0 to C8. Type a note like D2, F♯3 or B♭1, or use − and +.
Save and use keeps it on this device (up to 8 tunings). Use without saving tunes with it for now.
Reference A
Slider 380–500 Hz. Type any value from 300 to 600 Hz.
More pitches
Sound
Violin, viola, cello and double bass start with Bowed, the rest with Acoustic.
Note length
Match a recording Beta
Find the A a song was recorded at, then tune to it and play along.
…listening
Play the song, loud and clear.
Result
This recording sits on A 440
The tuner already matches it: nothing to change.
A recording is only known within a half step: if the song is a half step down, also change the tuning.
Beta: tested on real records and synthetic songs. Check the result by ear.
Nothing is uploaded: the sound is measured on this device.
Settings
Mode
Guided: one string at a time, from the thickest.
Meter
Bar: a slider with a mint in-tune zone.
Note length
How long a tapped string and Hear sound. Repeat plays the string again every few seconds, Continuous holds it: tap it again to stop.
Reference sound
Violin, viola, cello and double bass start with Bowed, the rest with Acoustic. A sound you pick stays.
Volume
Phone speakers play very low notes an octave up.
Note names
Sharps and flats
Octave numbers (E2, E4)
Tells the two E strings apart: E2 is the low one, E4 the high one.
Frequencies (Hz)
Each string's pitch in hertz, such as 82.4 Hz.
In tune within
Precise is not used with harmonics: Normal ±3 applies.
Harmonic mode
For one low string: play its 12th-fret harmonic (×2) or its 5th-fret one (×4).
Pro view
The pitch heard in Hz, tenths of a cent and the input picker. Turns on octave numbers and frequencies.
Device names appear after you allow the microphone.
Input channel
Auto picks the channel with sound. Interfaces: choose the input your instrument is plugged into.
Background
Night ocean, cosmos, forest and more.
The sound never leaves your device. No account, no cookies.
Any instrument or voice
About the chromatic tuner
Chromatic mode has no strings. Play or sing any note, and the tuner shows the nearest note name, its octave, and how many cents sharp or flat you are.
It works for winds, brass, keyboards, voice, and any string instrument without a preset.
Tip. Wind instruments play flat when they are cold. Warm up for a minute before you tune.
How close it gets
- ≤ 0.2 ¢largest error on a clean tone, anywhere from A0 to E5
- ≤ 1 ¢through a phone-mic model, E2 and up
- ≤ 2 ¢through a phone-mic model at A0 (27.50 Hz) and B0 (30.87 Hz), the deepest bass notes
A4 = 440 Hz
Note frequencies at A4 = 440 Hz
| Note | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
|---|---|---|---|---|---|---|---|---|---|
| C | 16.35 | 32.70 | 65.41 | 130.81 | 261.63 | 523.25 | 1046.50 | 2093.00 | 4186.01 |
| C♯ / D♭ | 17.32 | 34.65 | 69.30 | 138.59 | 277.18 | 554.37 | 1108.73 | 2217.46 | 4434.92 |
| D | 18.35 | 36.71 | 73.42 | 146.83 | 293.66 | 587.33 | 1174.66 | 2349.32 | 4698.64 |
| D♯ / E♭ | 19.45 | 38.89 | 77.78 | 155.56 | 311.13 | 622.25 | 1244.51 | 2489.02 | 4978.03 |
| E | 20.60 | 41.20 | 82.41 | 164.81 | 329.63 | 659.26 | 1318.51 | 2637.02 | 5274.04 |
| F | 21.83 | 43.65 | 87.31 | 174.61 | 349.23 | 698.46 | 1396.91 | 2793.83 | 5587.65 |
| F♯ / G♭ | 23.12 | 46.25 | 92.50 | 185.00 | 369.99 | 739.99 | 1479.98 | 2959.96 | 5919.91 |
| G | 24.50 | 49.00 | 98.00 | 196.00 | 392.00 | 783.99 | 1567.98 | 3135.96 | 6271.93 |
| G♯ / A♭ | 25.96 | 51.91 | 103.83 | 207.65 | 415.30 | 830.61 | 1661.22 | 3322.44 | 6644.88 |
| A | 27.50 | 55.00 | 110.00 | 220.00 | 440.00 | 880.00 | 1760.00 | 3520.00 | 7040.00 |
| A♯ / B♭ | 29.14 | 58.27 | 116.54 | 233.08 | 466.16 | 932.33 | 1864.66 | 3729.31 | 7458.62 |
| B | 30.87 | 61.74 | 123.47 | 246.94 | 493.88 | 987.77 | 1975.53 | 3951.07 | 7902.13 |
Set a different A4 in the tuner and every note moves with it. Charts for A = 432, A = 442 and A = 415 are on their own pages.
Questions
Does it work for transposing instruments?
It shows concert pitch. A B♭ trumpet playing a written C shows B♭, and an E♭ alto sax playing a written C shows E♭.
What do the cents mean?
A cent is one hundredth of a half step. Within about 5 cents most people hear no difference on a single note; in chords, a few cents can already cause a slow wobble.
Which A4 should I use?
Use 440 Hz unless your group, piano or recording uses something else. Many orchestras use 442 or 443, and baroque ensembles often use 415.