He has a total of 65 points, including 24 goals, in 48 games since December 1.
This gives him an average of 1.35 points per game since December. If he had played 82 games, Sidney Crosby would have finished with a total of 111 points. This would be his second best campaign in 17 NHL seasons. In 2006-07, he had 36 goals and 84 assists for 120 points.
If we take his entire season, Crosby is averaging 1.24 points per game so he would finish with 102 points in 82 games.