memory alpha

A pascal (or Pa) was a unit of pressure equal to 1/100 millibar.

The warp core pressure aboard Intrepid-class starship was measured in both kilopascals or megapascals. (VOY: "Caretaker", "Twisted")

Comparative list of pressure

Kilopascal = 1 thousand pascals
Since Federation starships were kept at 1 atm, the atmosphere of a Borg cube was therefore kept at just over 103 kilopascals, or approximately 1.02 atm.
Megapascal = 1 million pascals

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