Antonsson, who is currently top scorer in Sweden’s top flight, will have a medical with United on Monday, Kalmar confirmed this afternoon.
Kalmar president Mattias Rosenlund refused to name the club who have bid in the region of £1m for Antonsson and insisted the deal was not complete but he said an agreement was in place for the 25-year-old Swede to move to England from his homeland.
Antonsson has attracted attention with 10 goals in 12 games in Sweden’s Allsvenskan division this season.
He joined Kalmar from Swedish lower league side Halmstad last year and has averaged close to a goal from every two matches during his time in the top flight.
His arrival in West Yorkshire would be the first stage of United’s attempt to strengthen the attacking end of a squad who struggled in the Championship last season, producing just 50 goals in 46 games.
Leeds and Aston Villa have both been linked with Antonsson in the past month. Swedish website www.fotbolldirekt.se claimed today that United have all but secured his signature.
Kalmar president Roselund told Swedish media: “We are in agreement with a club.
“He will undergo a medical on Monday to check that nothing interferes with the process. That is what we are waiting for.
“We are satisfied with the agreement, that much I can say about it. It will be good for all parties. We’ve agreed and Antonsson has agreed with the club. Formally it is not completed yet.”