8-String Guitar Tuner
Tune an 8-string guitar with your microphone in standard F♯ B E A D G B E or drop E. The tuner picks up even the lowest strings.
- Free, no sign-up
- 8-string tunings
- Detection down to E1
- Private, on-device
Reference pitch (A4)
Hz
Lower it in noisy rooms
Press Start tuning, then play a string
0/8 tuned
8-String Standard notes
A4 = 440 Hz| String | Note | Frequency |
|---|---|---|
| 8 | F♯1 | 46.25 Hz |
| 7 | B1 | 61.74 Hz |
| 6 | E2 | 82.41 Hz |
| 5 | A2 | 110.00 Hz |
| 4 | D3 | 146.83 Hz |
| 3 | G3 | 196.00 Hz |
| 2 | B3 | 246.94 Hz |
| 1 | E4 | 329.63 Hz |
Bass-like low end
Standard 8-string tuning is F♯ B E A D G B E. It adds a low F♯1 (46.2 Hz) and B1 below standard tuning. Drop E lowers the 8th string to E1, the same note as the low E on a bass guitar.
For the lowest strings, play the 12th-fret harmonic and lock the string in Manual mode.
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 8-string guitar 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
How is an 8-string guitar tuned?
Standard tuning is F♯1 B1 E2 A2 D3 G3 B3 E4. Drop E lowers the 8th string to E1.
Why can’t my phone hear the 8th string?
The lowest strings sit at 41–46 Hz, which is too low for small microphones to hear well. Play the 12th-fret harmonic, which sounds an octave higher, and lock the string in Manual mode.
Do I need special strings for drop E?
Usually yes. Drop E needs a heavier 8th string than a standard 8-string set has. Otherwise the string flaps and buzzes.
All guitar tunings
Standard & down-tuned
Drop
Open
Alternate
7-string
8-string
12-string & guitalele
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Music tools
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