The invention proposes a blocking calculation module (1) configured to calculate blocking data of an ophthalmic lens member (2) on a blocking element (3) of a blocking station (4), comprising:—receiving means (11) configured to receive input data from a remote device, the input data comprising optical data related to the ophthalmic lens member,—calculation means (15) configured to calculate the blocking data from the input data, and—transmitting means (17) configured to make the blocking data available to the blocking station.