Open E guitar tuner online
Open E guitar tuning is E2 B2 E3 G♯3 B3 E4, from sixth string to first. Those open notes form an E-major chord. Compared with standard tuning, raise string 5 from A2 to B2, string 4 from D3 to E3 and string 3 from G3 to G♯3.
Open-string notes and frequencies
Open E guitar tuner: default open-string targets, lowest to highest. A4=440 Hz.
| String / course | Note | Frequency (Hz) |
|---|---|---|
| 6 | E2 | 82.41 |
| 5 | B2 | 123.47 |
| 4 | E3 | 164.81 |
| 3 | G♯3 | 207.65 |
| 2 | B3 | 246.94 |
| 1 | E4 | 329.63 |
How to use it
- Remove any capo and select open E.
- Allow the microphone and check the unchanged sixth-string E2.
- Raise the fifth and fourth strings gradually to B2 and E3.
- Raise the third string a semitone to G♯3, then verify B3 and E4.
- Recheck all six strings before strumming the open chord.
Help and explanations
The remaining E2, B3 and E4 stay at their usual pitches. This page starts in open E and includes open D and standard tuning in the selector, making it easier to check which strings change when you switch layouts.
Three E notes, two B notes and one G♯
A letter alone does not establish the right target. E2 is an octave below E3, and E4 is another octave higher. B2 and B3 are also an octave apart. Use those relationships as an ear check after measuring individual strings. G♯ is the chord’s major third: leaving that string at G produces a different open chord, even if the other five strings are correct.
Open E increases tension on three strings relative to standard tuning. Check the maker’s guidance for your instrument and gauges before raising them. Open D has the same interval pattern a whole step lower: D2 A2 D3 F♯3 A3 D4. With a capo at fret 2 it gives the sounding open-E pitches. Tune open D without the capo first, fit it gently and recheck the sounding notes. For slide playing, set the open strings with the slide clear; pressure or a misplaced slide affects the note you are measuring.
Tips
- Read G♯3 carefully: the third string rises only one semitone.
- After raising three strings, revisit the unchanged strings as well.
- Tune one open string at a time before using a full chord as the final check.
Frequently asked questions
What are the notes for open E tuning?
E2 B2 E3 G♯3 B3 E4, sixth to first. Together they spell an E-major chord.
Which strings change from standard to open E?
The fifth rises A2 to B2, fourth D3 to E3 and third G3 to G♯3. Strings six, two and one retain E2, B3 and E4.
Is open E the same as E standard?
No. E standard is E2 A2 D3 G3 B3 E4. Open E changes three strings to make an open major chord.
Can I use open D with a capo instead?
Yes. Open D is the same interval layout a whole step lower, so a capo at fret 2 produces open-E sounding pitches.
Is open E useful for slide guitar?
Yes. The open major chord gives a straight slide a major-chord layout. Keep the slide off the strings while setting open-string tuning.
Can raising the strings increase tension?
Yes, the three raised strings become tighter. Confirm appropriate gauges and the instrument’s tuning guidance before changing.