Building Water in EVE Online

What it takes to make Water, straight from the game's own blueprint data: every material and how many of each. The calculator above prices that list at one region's orders and draws the whole chain as a graph.

What goes into one run of Water

20 units per run - this one is made on a planet, not in a station
Material	Per run	Can be built too
Aqueous Liquids	3,000	no - buy or mine it

Production runs in whole batches. One run of Water gives 20 units, so asking for fewer than that still means one full run - the game has no half runs, and rounding down would quietly tell you to buy the missing pieces.

For what Water actually is - mass, volume, attributes and the description from the game - see its item page, and for what it trades at right now, its market page.