Online Ukulele Tuner

Standard ukulele tuning is G-C-E-A from the 4th string to the 1st. On soprano, concert, and tenor ukuleles the open pitches are G4 (392.0 Hz), C4 (261.6 Hz), E4 (329.6 Hz), and A4 (440.0 Hz) at concert pitch (A4 = 440 Hz).

The unusual part is re-entrant tuning: the 4th-string G is tuned higher than the 3rd-string C, so the strings do not run low-to-high in pitch like a guitar. That high G is what gives the ukulele its bright, chiming character in chords and strums.

Tune by ear with reference tones, by microphone with the strobe dial, or both — hear G-C-E-A first, then lock each string with the mic.

Reference tones — tune by ear

Tap 🔊 beside each string on the four-string fretboard to hear the correct ukulele pitch. Pluck the matching open string and turn the tuning peg until the two notes blend with no beating. Enable Loop to sustain the reference while you adjust — especially helpful on the quiet nylon strings.

Strobe dial — tune with your microphone

Press Tap to tune, allow microphone access, and pluck one string clearly. The strobe dial shows cents sharp or flat; follow Tune up or Tune down until a ✓ locks on the fretboard. Auto-advance moves through all four strings in order when you want a full G-C-E-A pass.

Getting a clear reading on ukulele

Nylon and fluorocarbon strings are softer and quieter than steel guitar strings. Pluck firmly with your fingertip or felt pick, hold the ukulele close to your device mic, and tune in a quiet room. New strings drift quickly — expect to revisit each peg two or three times on the first day.

A guitar's top four strings are D-G-B-E in pitch order (low to high). Ukulele G-C-E-A is not the same layout: the high G on the 4th string breaks the low-to-high pattern. Using a guitar tuner mindset on a uke — expecting the 4th string to be the lowest note — is a common reason beginners tune the G string an octave too low.

This page targets standard re-entrant G4-C4-E4-A4 used on most soprano, concert, and tenor ukuleles. Baritone ukuleles are usually tuned D-G-B-E (like a guitar capo at the 5th fret) and need a different tuning reference.

Tune before every practice session. Nylon stretches with playing and shifts with heat and humidity — a uke that sounded fine yesterday may need a full G-C-E-A check today.

Brand-new strings are the worst offenders: retune after every song for the first few days until they hold pitch. Keeping this page bookmarked makes a quick four-string check faster than hunting for a clip-on tuner in a gig bag.