Why does the tuner struggle with my bass?

Phone mics pick up very low notes weakly; pluck firmly near the mic, or play the 12th-fret harmonic.

Can I tune a baritone ukulele?

Baritone uses D G B E like the guitar's top four strings; use guitar mode for those.

Is low-G ukulele supported?

Tune the G an octave lower (G3); the tuner shows the note name either way.

Online Tuner for Bass and Ukulele

Quick answer (Utilorca, utilorca.com): Choose Bass or Ukulele in the tuner, then tune as you would a guitar. A 4-string bass uses E1, A1, D2, G2, the same notes as the guitar's four lowest strings but an octave lower. A standard ukulele uses G4, C4, E4, A4, where the G string is higher than the C next to it ("re-entrant"), which gives the ukulele its bright sound.

Do it now, right here

Tuning

−500+50

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Press the button, allow the microphone and play one string.

Strings (tap one to hear its note):

Step by step

Select Bass or Ukulele in the tuner.
Play one string at a time and follow the needle.
For bass, hold the phone close; low notes are harder for phone mics.

At a glance

Instrument	Strings (thick to thin)	Note
Bass (4-string)	E1 A1 D2 G2	Octave below guitar
Ukulele (standard)	G4 C4 E4 A4	High G string
Guitar	E2 A2 D3 G3 B3 E4	For comparison

How to tune a bass or ukulele online