tuneguitar.

LESS TUNING. MORE PLAYING.

Open G Guitar Tuner.

An open G chord, waiting under your fingertips.

Tune open strings first. Fit your capo, then switch on “Check with capo on”.

Open GD G D G B D
REFERENCE TONEA4 = 440 Hz
D2
D · 6th string73.42 Hz

Choose a string below to hear its note.

PLAY A STRINGThickest Thinnest
6 strings · 3 seconds each
Sound & advanced settings

A gentle ping follows a steady note within 5 cents. Its volume follows the sound slider. Microphone audio stays on your device.

Check your intonation.

Compare one open string with the same string pressed at fret 12. Remove your capo and mute the other strings.

  1. 1. Tune and measure the open string
  2. 2. Press at fret 12 and measure again

Press just behind fret 12 with normal pressure. Do not play a harmonic. Repeat the comparison to confirm the result.

Check your six strings.

Press start, then sweep gently across all six open strings, from thickest to thinnest. Let them ring together.

Experimental: overlapping notes can be unclear. Select any result to measure that string alone in this window.

Check a known reference.

Play a steady reference from another device or instrument whose frequency you know. Enter that frequency below.

This compares your input with the reference you supply. It is not a certified calibration. Only numbers are saved, never audio.
Acoustic, electric & classicalFree. No download. Just play.

By ear: click a note, match your string, then move to the next. Keyboard: 1–6 to play · Esc to stop

KNOW YOUR TUNING

Open G: D G D G B D

Lower strings 6, 5 and 1 by a whole step from standard. Keep the D, G and B strings as they are. This is the six-string version of Open G.

The table shows the open-string setup at A4 = 440 Hz. For capo pitches, use the capo controls above.

Open G notes and frequencies from thickest to thinnest
StringNoteHzFrom standard
6 · thickestD273.42E → D, down a whole step
5G298.00A → G, down a whole step
4D3146.83D, unchanged
3G3196.00G, unchanged
2B3246.94B, unchanged
1 · thinnestD4293.66E → D, down a whole step

THE TUNEGUITAR GUIDE

Understand Open G

TuneGuitar guide · Updated 6 October 2026 · How we prepare our guides

The root is not the lowest string

This six-string Open G layout starts on D, the fifth of the G-major chord. The root G is on string 5. When an open chord sounds heavier than expected, compare a six-string strum with a strum starting at string 5. Both belong to G major, but the bass note changes the inversion. Do not remove a string merely because a particular performer uses a five-string variant.

Find the major third

String 2 remains B3, the major third above G. It is the note that distinguishes the major chord from a suspended or minor sound. Compare B3 with string 3 at fret 4, then check the open B against the tuner again. This helps separate an unfamiliar chord colour from an actual tuning error.

Open A without raising three strings

Open G with capo 2 produces E A E A C sharp E, the sounding notes of the Open A preset. Tune in Open G with the capo removed, fit it, then enable the capo check. Keep the saved open-string tuning as Open G. This route changes the available fretboard and feel, so it is a musical alternative rather than an identical physical setup.

Your string-by-string route from standard

This is a comparison of target pitches, not a recommendation to use every tuning on every guitar. Start from the tuning your instrument actually has. Use the directions and the octave labels together.

Standard → Open G
StringStartTargetAdjustment
6E2D2Lower 2 semitones
5A2G2Lower 2 semitones
4D3D3Keep this target
3G3G3Keep this target
2B3B3Keep this target
1E4D4Lower 2 semitones

Nearby tunings, compared by their actual notes

These are the three closest six-string presets by total semitone movement from this setup. The ranking describes target changes, not playing difficulty or physical suitability. A familiar name can hide a different middle-string layout.

What changes from this tuning?
Next tuningAll target notesStrings that change
DADGADD2 · A2 · D3 · G3 · A3 · D45, 2
Drop DD2 · A2 · D3 · G3 · B3 · E45, 1
Open DD2 · A2 · D3 · F♯3 · A3 · D45, 3, 2

READY FOR THE FIRST CHORD

Tune for a song.

Search 100 song setups by title or artist.

Browse all 100 songs →

GOOD TO KNOW

Questions about Open G

Do I need to remove the lowest string?

No. This preset uses all six strings. Some players use a five-string variation, but a regular six-string guitar works for the tuning shown here.

Why is the lowest string D when this is Open G?

The open strings contain a G-major chord, but this six-string version places D, its fifth, in the bass. Starting your strum on string 5 puts G underneath the chord. The tuning name describes the chord, not necessarily the lowest note.

What should stay unchanged when I leave standard tuning?

The fourth, third and second strings remain D3, G3 and B3. Lower the sixth, fifth and first strings to D2, G2 and D4. Use those unchanged middle strings as a listening reference while you work through the changed targets.

Privacy & cookies

Your guitar audio is processed entirely on your device. We do not record it, store it or upload it.

Saved guitars, setlists and your ping preference are stored in this browser on this device. You can delete each guitar in “My guitars”. Clearing site data removes these settings and the offline cache. The offline cache contains the tuner’s pages and the code that generates reference tones, never microphone recordings.

Google Analytics (G-G2RC12Y00X) loads only after you accept analytics cookies. It measures visits and usage; microphone audio is never sent to Google. Use Cookie settings in the footer to accept or withdraw consent. Analytics cookies and your choice last up to six months. Advertising uses separate consent settings. The hosting service may process routine connection data to deliver and secure the site.

This site includes the Google AdSense publisher tag. It contacts Google to connect this site to AdSense and load any consent messages published for the site. Advertising is subject to Google’s review and the publisher’s ad and consent settings. Analytics consent does not grant advertising consent. When Google’s advertising consent message is available, use Ad privacy settings in the footer to revisit it. No microphone audio is shared with AdSense.

Last updated 13 September 2026.

Read the full privacy policy

My guitars

Save the current strings, capo setup, reference sound and concert pitch for your guitar. No account needed.

Your guitars will appear here.

Saved only in this browser. Up to 20 guitars.

Share this tuning

This link includes your strings, capo, reference pitch and tuning mode.

Copy the link, then paste it into a message.

Keep your tuner close.

Use your browser’s menu and choose Install app or Add to Home Screen. On iPhone or iPad, open this page in Safari, tap Share, then Add to Home Screen.

Once the tuner shows “Ready offline”, reference tones and microphone tuning work without a connection. Microphone permission is still required.

Your own tuning.

Enter 4 to 12 notes in physical string order, from the thickest side. Include the octave, for example E2 A2 D3 G3 B3 E4. Use notes suitable for your strings and instrument.

Save your setup in My guitars, or share its link.

Your setlists.

A setlist keeps songs in playing order, with the tuning and capo for each one. Open a song’s setup in the tuner when you are ready to play.

Create your first setlist

Give your practice session a name, then add songs.

Create a setlist to start adding songs.

    Saved in this browser. Up to 10 setlists with 30 entries each. Shared lists open for review before saving.

    Your lists stay on this device. Songs are not played automatically.

    Share a correction.

    Describe the guitar part or version, the correct tuning and a source. You can copy or share the report with the site owner. It is not submitted automatically.