In addition to Kärra HF, 69 other teams from 12 different countries played in Girls 18. They were divided into 11 different groups, whereof Kärra HF could be found in Group 10 together with Raelingen HK, Ottestad IL, HC Treia/Jübek, Vorup FB and LIF Lindesberg. Kärra HF continued to A-Play-off after reaching 1:st place in Group 10. In the playoff they made it to 1/8 Final, but lost it against Skanderborg HB with 21-26. In the Final, IK Sävehof 2 won over Skanderborg HB and became the winner of A-Play-off in Girls 18. Kärra HF also participated in Girls 18 during Partille Cup 2018. They reached the 1/4 Final in G18 B-Play-off, but lost it against Lugi HF 2 with 10-18.