GuitarTuner.online

6-String Guitar tuner – Open F

C-F-C-F-A-F · Open

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Microphone off
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Press “Start tuner” – the browser will ask for microphone access. Sound is analysed on this device and never uploaded.

This free online tuner listens through your microphone and shows how close each string of your 6-String Guitar is to Open F tuning (C-F-C-F-A-F). Play a string, watch the needle, and turn the peg until the meter glows green. If you prefer tuning by ear, tap any string card to hear its reference tone.

About Open F tuning

Compared with Standard E, Open F moves 6 strings. Some strings go up and others go down, so the total tension stays close to Standard E while the shape of the fretboard changes completely.

How Open F differs from Standard E, string by string.
StringStandard EOpen FChange
1E2C2down 4 semitones
2A2F2down 4 semitones
3D3C3down 2 semitones
4G3F3down 2 semitones
5B3A3down 2 semitones
6E4F4up 1 semitone

Played open, the strings sound C-F-C-F-A-F – from C2 at the bottom to F4 at the top, a span of 2 octaves and 5 semitones. Step by step across the neck the intervals are a fourth, a fifth, a fourth, a major third, a minor sixth, and that is what decides how chord shapes fall under the hand.

Strummed open, with nothing fretted, the strings spell F. That is what makes a tuning like this useful for slide playing and drones – a full chord is one straight barre away at any fret. See F shapes in this tuning →

Dropping 4 semitones takes the tension down noticeably. A heavier set – or at least a heavier bottom string – keeps the intonation honest and stops the low string buzzing.

History

Where the Open F tuning comes from

Open F is a relatively rare open tuning, closely related to open G and open C: it spells an F major chord with a low C in the bass. It has no famous originator and is used mainly by fingerstyle and slide players who want an open chord between the more common tunings.

History of the instrument: 6-String Guitar →

Other 6-String Guitar tunings

Standard

Standard E E-A-D-G-B-EHalf Step Down (Eb) D#-G#-C#-F#-A#-D#Whole Step Down (D) D-G-C-F-A-DB Standard B-E-A-D-F#-BPlus 1 (F) F-A#-D#-G#-C-FPlus 2 (F#) F#-B-E-A-C#-F#

Drop

Drop D D-A-D-G-B-EDouble Drop D D-A-D-G-B-DDrop C# C#-G#-C#-F#-A#-D#Drop C C-G-C-F-A-DDrop B B-F#-B-E-G#-C#Drop A A-E-A-D-F#-BDrop G# G#-D#-G#-C#-F-A#Drop G G-D-G-C-E-ADrop F# F#-C#-F#-B-D#-G#Drop E E-B-E-A-C#-F#

Open

Open C C-G-C-G-C-EOpen D D-A-D-F#-A-DOpen Dm D-A-D-F-A-DOpen E E-B-E-G#-B-EOpen Em E-B-E-G-B-EOpen F C-F-C-F-A-FOpen G D-G-D-G-B-DOpen Gm D-G-D-G-A#-DOpen A E-A-C#-E-A-EOpen A 2 E-A-E-A-C#-EOpen Am E-A-E-A-C-EOpen B B-F#-B-F#-B-D#CGDGBD (Open G Low C) C-G-D-G-B-DFACGCE (Fmaj7) F-A-C-G-C-EWahine (G) D-G-D-F#-B-D

Modal

DADGAD (D Modal) D-A-D-G-A-DG Modal D-G-D-G-C-DOrkney C-G-D-G-C-D

Alternative

Double Daddy D-A-D-D-A-DAll Fourths E-A-D-G-C-FNew Standard (NST) C-G-D-A-E-GNashville (High Strung) E-A-D-G-B-EEADF#BE E-A-D-F#-B-EOstrich D-D-D-D-D-D

Chords for this tuning

CGDAEFAll 6-String Guitar chords →
How do I tune my 6-String Guitar to Open F?

Allow microphone access, pluck a string, and the tuner will detect it automatically. The needle shows whether the string is flat or sharp – adjust until the reading is within ±5 cents (C-F-C-F-A-F).

Which notes are used in Open F tuning?

Open F tuning for 6-String Guitar uses the notes C-F-C-F-A-F, listed from the lowest string to the highest.

Can I tune without a microphone?

Yes. Every string card plays a reference tone – tap it and match your string to the sound by ear.