how much does a bottle of water weigh? May 2, 2022 by Anirban Share via: Facebook Twitter LinkedIn Mix More How Much Does A Gallon Of Water Weigh? A 16.9 fluid ounce or 500 ml bottle weighs 500 grams, which is equal to 500/454 = 1.1 pounds. How much does one gallon of water weigh? Share via: Facebook Twitter LinkedIn Mix More