The baritone ukulele uses chord shapes that are identical to GCEA uke. They are also very similar to guitar, just missing the two top strings.
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If you are studying baritone on its own you’ll have a much easier time learning these shapes than if you also play standard ukulele chords. I find that having the same shapes in both tunings is incredibly confusing.
However, if you’re able to transpose the key of the song in your mind and think of your I IV V shapes instead of the actual chord names, you’ll probably have an easier time.
GCEA chords are a perfect 4th higher than baritone chords. This means that a baritone C major is an F major on GCEA uke. Here’s a reference chart:
Baritone to Standard
C -> F C#/D# -> F#/Gb D -> G D#/Eb -> G#/Ab E -> A F -> A#/Bb F#/Gb -> B G -> C G#/Ab -> C#/Db A -> D A#/Bb -> D#/Eb B -> E
If all you have are GCEA uke chords for reference, you can also convert backwards and move up a 5th or down a 4th:
Standard GCEA to Baritone
C -> G C#/D# -> G#/Ab D -> A D#/Eb -> A#/Bb E -> B F -> C F#/Gb -> C#/Db G -> D G#/Ab -> D#/Eb A -> E A#/Bb -> F B -> F#/Gb