Online Bass Tuner
Tune 4, 5 and 6-string bass guitars with your microphone. Includes standard EADG, drop D, drop C, BEAD, tenor and high-C tunings, with deep, clear reference tones.
- Free, no sign-up
- 4, 5 & 6 strings
- Low-frequency detection
- Private, on-device
Reference pitch (A4)
Hz
Lower it in noisy rooms
Press Start tuning, then play a string
0/4 tuned
Standard notes
A4 = 440 Hz| String | Note | Frequency |
|---|---|---|
| 4 | E1 | 41.20 Hz |
| 3 | A1 | 55.00 Hz |
| 2 | D2 | 73.42 Hz |
| 1 | G2 | 98.00 Hz |
Tuning a bass guitar
Standard bass tuning is E A D G, one octave below the four lowest strings of a guitar. Low notes take a moment to settle, so let each string ring for a second before you read the needle.
Tip: play the harmonic at the 12th fret for a cleaner signal, especially on phone and laptop microphones.
Keyboard shortcuts
- Space Start or stop the microphone
- 1–9 Play a string’s reference note
- M Switch Auto / Manual mode
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Start the tuner
Press Start tuning and allow access to the microphone. Hold your bass 20–50 cm from the mic.
-
Play one string
Pluck one string and let it ring. Auto mode shows the closest string. To stay on one string, switch to Manual.
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Adjust the tuning machine
If the needle is on the left, tighten the string to raise the pitch. If it is on the right, loosen it. Stop when the needle is in the middle and turns green.
Frequently asked questions
What are the notes on a bass guitar?
A 4-string bass is tuned E A D G (E1, A1, D2, G2), exactly one octave below the four lowest guitar strings. A 5-string adds a low B (B0), and a 6-string adds a high C as well.
My laptop mic can’t hear the low E. What can I do?
Small microphones have trouble hearing notes below 50 Hz. Play the natural harmonic at the 12th fret instead. It sounds an octave higher, so the tuner hears it much more easily. Lock the string in Manual mode, and the tuner will ignore the octave difference.
How do I tune to drop D on bass?
Choose Drop D in the tuning menu, then lower the E string a whole step until the needle centres on D. The other strings stay at A D G.
Can I tune a fretless or upright bass here?
Yes. Fretless basses use the same tunings. For upright bass, try our double bass tuner, which has bowed reference tones.
All bass tunings
More tuners
- Guitar Tuner Acoustic, electric and 12-string with 45 tunings. E A D G B E
- Ukulele Tuner Soprano, concert, tenor and baritone ukulele. G C E A
- Violin Tuner G D A E with bowed reference tones. G D A E
- Viola Tuner C G D A, a fifth below the violin. C G D A
- Cello Tuner C G D A, an octave below the viola. C G D A
- Double Bass Tuner Upright bass in orchestral and solo tuning. E A D G
- Banjo Tuner Open G, double C, sawmill, tenor and Irish tenor. G D G B D
- Mandolin Tuner Mandolin, mandola and octave mandolin. G D A E
- Chromatic Tuner Any instrument or voice, with B♭/E♭/F transposition.
Music tools
- Metronome Accurate online metronome with accents and subdivisions.
- Tone Generator Play any frequency from 20 Hz to 20 kHz.
- Tuning Fork 415, 432, 440, 442 and 444 Hz forks.
- Pitch Detector See the exact note and frequency you play. C
- Custom Tuning Tuner Build any tuning with 3 to 12 strings. E A D G B E
- Tune Guitar by Ear Repeating reference notes for every string. E A D G B E