Guitar Tuner
- E2
- A2
- D3
- G3
- B3
- E4
- Frequency
- —Hz
- Deviation
- —cents
Standard tuning is E2 82.41 Hz, A2 110 Hz, D3 146.83 Hz, G3 196 Hz, B3 246.94 Hz and E4 329.63 Hz. Play one string at a time: the tuner reports the nearest of the six, so two ringing strings can point at the wrong one.
A guitar tuner built around the six open strings
Standard tuning is six known frequencies, so the guitar tuner can do more than name a pitch: it picks the string you are closest to and measures the distance to it. Play a string, watch the meter settle on that string, and adjust until it centers.
The six strings in a row
E2, A2, D3, G3, B3 and E4 are listed low to high, and the guitar tuner highlights the one your pitch is nearest.
Cents to the nearest string
The deviation is measured against the string you are closest to, not a fixed target, so the number is always the adjustment still to make.
In tune inside five cents
A string is marked in tune within five cents of its target, which is closer than most ears can hear on a single string.
How it works
Tune a guitar in three steps
Start the microphone
Press start and allow microphone access. The guitar tuner reads the audio in the browser and never records it.
Play one open string
Pluck a single string and let it ring. The nearest of the six is highlighted and the meter moves with your pitch.
Adjust until it centers
Tune toward the center: flat reads negative, sharp reads positive, and the string is in tune inside five cents.
Strings, range and tolerance
E2 82.41 Hz, A2 110 Hz, D3 146.83 Hz, G3 196 Hz, B3 246.94 Hz and E4 329.63 Hz, listed low to high.
The span of standard tuning, which sits inside the tuner's wider 50 Hz to 1500 Hz search band.
A string is marked in tune within five cents of its target frequency.
The guitar tuner reads a single pitch, which is why muted neighbours or a ringing chord confuse it.
Who uses a guitar tuner
Guitarists tuning without a clip-on
Pluck each string and read the nearest of the six on a phone or a laptop instead of hunting for a hardware tuner.
Beginners learning the strings
See the six string names in order and which of them you are actually playing, one pluck at a time.
Players checking a stored instrument
Confirm a guitar that has sat in its case is still at pitch, string by string, before a session starts.
Guitar Tuner FAQ
Tune any note, not just the six strings
Reach for the chromatic tuner when the note is off the six-string map, or measure the range of a voice instead.