How Much Does Water Weigh? | Scientific Answer & Practical Examples #3368255 (License: Personal Use)

Water weighs approximately 1 kilogram per liter at 4°C (its densest point), but this value shifts with temperature, pressure, and dissolved substances. For instance, a US gallon of pure water weighs about 8.35 lbs (3.79 kg), while seawater is heavier due to salinity. This image humorously highlights the common confusion around the question using a meme-style overlay referencing pop culture.

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