Multiple choice 1000 litres is equal to ____ U.S. gallons. 226 264 290 330 Reveal answer Fill a bubble to check yourself B Correct answer Explanation 1 US gallon equals approximately 3.785 liters. To convert 1000 liters to US gallons: 1000 / 3.785 = 264.2 gallons. The answer 264 is the closest approximation. 226, 290, and 330 are incorrect conversions.