What are the frequencies of standard guitar tuning?

Standard EADGBE at A4 = 440 Hz is E2 ≈ 82.41 Hz, A2 = 110.00 Hz, D3 ≈ 146.83 Hz, G3 = 196.00 Hz, B3 ≈ 246.94 Hz and E4 ≈ 329.63 Hz, from the lowest to the highest string.

How is drop D different from standard?

Drop D lowers only the 6th string from E2 to D2, leaving the other five strings unchanged. It makes power chords on the low strings playable with one finger.

What notes are in DADGAD tuning?

DADGAD tunes the strings, low to high, to D A D G A D. It is an open Dsus4-style tuning popular in Celtic and fingerstyle playing for its ringing, modal sound.

What is open G tuning?

Open G tunes the strings to D G D G B D, so strumming the open strings sounds a G major chord. It is widely used for slide guitar and in rock by players like Keith Richards.

What is half-step down tuning?

Half-step down (E♭ A♭ D♭ G♭ B♭ E♭) lowers every string by one semitone from standard. It slightly slackens the strings and drops the overall pitch, common in rock and blues.

Why can I change the A4 reference from 440 Hz?

A4 = 440 Hz is modern concert pitch, but some orchestras and players tune to 441-443 Hz, or to 432 Hz. Adjusting the reference rescales every string frequency proportionally so the table matches your chosen pitch.

Is this an audio tuner?

No — it is a reference table of target frequencies. Use it alongside a tuner or your ear. No microphone or network access is used.

Guitar Tuning Reference

This reference lists the note names and exact frequencies for the most common guitar tunings: standard (EADGBE), drop D, half-step down, DADGAD and open G. For each tuning it shows every string from the low 6th to the high 1st, with an adjustable A4 reference — handy for tuning by ear, by a separate tuner, or for understanding how alternate tunings differ.

How it works

Each string is defined by a musical note (a MIDI note number), and its frequency is derived using 12-tone equal temperament from your chosen A4 reference:

frequency = A4 × 2^((MIDI − 69) / 12)

A4 (MIDI 69) defaults to 440 Hz concert pitch, but you can change it — set 432 Hz or 442 Hz and every string rescales proportionally. Because each semitone is a factor of the twelfth root of 2, dropping a string by one semitone multiplies its frequency by about 0.9439.

Example

Standard tuning EADGBE at A4 = 440 Hz, low to high:

String	Note	Frequency
6th (low)	E2	82.41 Hz
5th	A2	110.00 Hz
4th	D3	146.83 Hz
3rd	G3	196.00 Hz
2nd	B3	246.94 Hz
1st (high)	E4	329.63 Hz

Switching to drop D changes only the 6th string from E2 (82.41 Hz) to D2 (≈ 73.42 Hz); the other five are unchanged. All frequencies are computed entirely in your browser.