Online Guitar Tuner
Standard Guitar Tuning
Tune a guitar to standard E A D G B E online and learn the six string notes, frequencies, interval pattern, tuning order, and when to use standard tuning.
How to use this online guitar tuner
Choose the tuning you need, listen to one string at a time, and use the cents meter to make small, accurate adjustments.
Choose a tuning
Keep Guitar selected, then choose Standard or an alternate tuning from the grouped Tuning menu. The six target notes around the headstock update immediately to match your selection.
Select a string and start the microphone
Select the note beside the matching tuning peg, then press Start tuning and allow microphone access. The selected button, peg, and string turn blue so you can see which string to adjust.
Play a clear, sustained note
Pluck only the selected string and let it ring while muting the others. Keep the guitar near the microphone and avoid loud background noise so the tuner can identify the fundamental pitch.
Follow the cents meter
A red marker on the left means the string is low and should be tuned up; on the right it is high and should be tuned down. Make small adjustments until the marker turns green, then continue with the next string.
Standard Guitar Tuning Explained
Standard tuning is the reference setup used for most guitar lessons, chord shapes, scales, songs, and notation. Here is how its notes, frequencies, and interval pattern work.
What is standard guitar tuning?
Standard guitar tuning sets the six open strings, from the thickest and lowest string to the thinnest and highest string, to E2, A2, D3, G3, B3, and E4. It is usually written E A D G B E. Numbering runs in the opposite direction: the low E is the 6th string and the high E is the 1st string.
What are the standard frequencies of the six strings?
With concert pitch set to A4 = 440 Hz, the open-string targets are 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. A tuner compares the measured frequency with these targets and reports the difference in cents.
Why does standard tuning use E A D G B E?
Most adjacent strings are separated by a perfect fourth: E–A, A–D, D–G, and B–E. The exception is G–B, which is a major third. This pattern balances compact chord shapes, practical scale fingerings, a useful range, and manageable left-hand stretches across the fretboard.
How should each string be tuned?
Start with the 6th-string E2 and continue through A2, D3, G3, B3, and the 1st-string E4. Pluck one open string, mute the others, and make small adjustments. If the cents marker is left of center the string is flat and needs to be tightened; if it is right of center the string is sharp and should be loosened.
When should standard guitar tuning be used?
Use standard tuning unless a song, teacher, or score requests another setup. It matches the chord diagrams, scale patterns, method books, tablature, and fretboard references used in most beginner and general guitar material. Alternate tunings are useful for specific sounds, but they change familiar note locations and chord shapes.