Kūlgrinda is a folk music group from Vilnius, Lithuania, established in 1989 by Inija and Jonas Trinkūnas.

The band was founded in 1989 by Jonas Trinkūnas and his wife Inija Trinkūnienė who also were the leaders of the modern Pagan movement Romuva.

Some of the recorded material has functioned as "musical scriptures" for the Romuva members and the band has regularly participated as an integral part of the movement's events.

It has specialised on sutartinės, a traditional form of polyphonic song-chant where several vocalists perform interlocking melodies that through rhythmic repetition create a pattern of musical expression.

The musicologist Daiva Račiūnaitė-Vyčinienė has compared this technique to the weaving of a multicoloured cloth.