Online Mandolin Tuner

Mandolin string notes and frequencies

The four courses, from lowest to highest, are G3 D4 A4 E5, the same notes as a violin. Frequencies below use A4 = 440 Hz.

How to tune a mandolin

1. Press Start Tuning and allow microphone access when your browser asks.
2. Play one note. Pluck a single string or play one key, close to the microphone, and let it ring.
3. Read the display. The big letter is the nearest note. The bar shows how far off you are: left is flat (tune up), right is sharp (tune down).
4. Turn until it goes green. Inside your tolerance (±3 cents by default) the display turns green and the string gets a check mark.

Tips

• Tune one string of a pair at a time. Mute the other with a finger.
• After both strings read green, play them together and listen for a slow “wobble”. No wobble means they match.