Kristoffer Karlsson has officiated 418 matches on record, averaging 2.7 cards and 18.1 fouls per game — a lenient official. A player is dismissed roughly once every 6 games, and the spot is pointed to 0.15 times per match. Home teams win 49% of matches under him, drawing 22% and losing 29%. Most active in the Allsvenskan (288 matches). 30% of his bookings come after the 75th minute, with the first card around the 34'. He cards more than 78% of Allsvenskan 2026 referees.