If rounding is enabled on the Extra Payments and Rounding option page (under the Scoring section in the category tree of the Preferences dialog box), the points are rounded off or up to nearest ten before and/or after doubles (for the latter, points can be rounded off or up to nearest hundred, as well), and either before or after adding the final payment doubles.
Traditionally, including the default European Classical rules, the points are rounded off to nearest ten after the doubles (but before adding the final payment doubles).
For more information, see Scoring variations Rounding.
Basic scheme of calculation
Basic tile points
Scores for basic sets
Scores for Flowers and Seasons
Scores for patterns based on Chows
Scores for patterns based on Pungs and Kongs
Scores for patterns based on the whole hand
Scores for miscellaneous patterns
Scores for winning
Limit and Special hands Classical
Limit and Special hands Serpents
Limit and Special hands Pairs
Limit and Special hands Special ways of going out
Limit and Special hands American hands
Limit and Special hands Miscellaneous
Printing scoring items
Renaming scoring items
Resetting the names of scoring items
Inclusion and scoring of hands and patterns