There are approximately 18.9271 liters in one 5-gallon bucket. To convert gallons to liters, you can use the conversion factor where 1 gallon is approximately 3.78541 liters. So, for 5 gallons:
\[ 5 \text{ gallons} \times 3.78541 \text{ liters/gallon} \approx 18.9271 \text{ liters} \]