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LESS TUNING. MORE PLAYING.

C Standard Guitar Tuner.

All six strings, two whole steps below standard.

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

C standardC F B♭ E♭ G C
REFERENCE TONEA4 = 440 Hz
C2
C · 6th string65.41 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.
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By ear: click a note, match your string, then move to the next. Keyboard: 1–6 to play · Esc to stop

KNOW YOUR TUNING

C standard: C F B♭ E♭ G C

Lower every string four semitones from standard. Chord shapes keep their usual relationships. For regular use, choose strings and a setup suitable for the lower tension.

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

C standard notes and frequencies from thickest to thinnest
StringNoteHzFrom standard
6 · thickestC265.414 semitones lower
5F287.314 semitones lower
4B♭2116.544 semitones lower
3E♭3155.564 semitones lower
2G3196.004 semitones lower
1 · thinnestC4261.634 semitones lower

THE TUNEGUITAR GUIDE

Understand C standard

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

All six strings move together

C standard is four semitones below regular standard. An E-shape chord sounds C; an A shape sounds F; a D shape sounds B flat. The pattern of fingerings survives because every interval between neighbouring strings stays the same. When writing a setlist, record both the tuning and the sounding key to avoid handing another player the wrong chord names.

A C in the bass does not identify the tuning

Drop C has G2 on string 5 and C3 on string 4. C standard has F2 and B flat2 there. These middle targets are the fastest way to distinguish the presets. After changing from Drop C, strings 5 through 1 all need to move down a whole step even though the lowest C stays put.

Check normal playing pressure

With the same string set, a four-semitone drop substantially lowers tension. Tune with a moderate attack and test a fretted note using the pressure you actually play with. If fretting or picking produces excessive sharpness, consider whether the instrument needs a setup appropriate to this register. Do not use a false reference frequency to hide that behaviour.

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 → C standard
StringStartTargetAdjustment
6E2C2Lower 4 semitones
5A2F2Lower 4 semitones
4D3A♯2Lower 4 semitones
3G3D♯3Lower 4 semitones
2B3G3Lower 4 semitones
1E4C4Lower 4 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
Baritone B standardB1 · E2 · A2 · D3 · F♯3 · B36, 5, 4, 3, 2, 1
C♯ standardC♯2 · F♯2 · B2 · E3 · G♯3 · C♯46, 5, 4, 3, 2, 1
Drop BB1 · F♯2 · B2 · E3 · G♯3 · C♯46, 5, 4, 3, 2, 1

READY FOR THE FIRST CHORD

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GOOD TO KNOW

Questions about C standard

How is C standard different from Drop C?

C standard is C F B flat E flat G C. Drop C is C G C F A D. They share a low C but have different intervals above it.

How far below standard is C standard?

Every string is four semitones lower. An E-major shape sounds C major, while an A-major shape sounds F major. The relative string intervals stay standard even though the pitch and string feel change.

What would capo 4 do on a C-standard guitar?

It restores the standard sounding pitches E A D G B E by adding four semitones to each open target. Keep C standard selected and set capo 4 for the comparison. This changes the vibrating length and does not make the uncapped setup identical to standard tuning.

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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.

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Last updated 13 September 2026.

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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.

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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.

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Give your practice session a name, then add songs.

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