John 2:6 New English Translation

⁶Now there were six stone water jars there for Jewish ceremonial washing,^[a] each holding twenty or thirty gallons.^[b]

John 2:6 tn Grk “for the purification of the Jews.”
John 2:6 tn Grk “holding two or three metretes” (about 75 to 115 liters). Each of the pots held 2 or 3 μετρηταί (metrētai). A μετρητῆς (metrētēs) was about 9 gallons (40 liters); thus each jar held 18-27 gallons (80-120 liters) and the total volume of liquid involved was 108-162 gallons (480-720 liters).sn Significantly, these jars held water for Jewish ceremonial washing (purification rituals). The water of Jewish ritual purification has become the wine of the new messianic age. The wine may also be, after the fashion of Johannine double meanings, a reference to the wine of the Lord’s Supper. A number have suggested this, but there does not seem to be anything in the immediate context which compels this; it seems more related to how frequently a given interpreter sees references to the sacraments in John’s Gospel as a whole.

New English Translation (NET)