How long does a 100 gallon tank last for a generator?

The duration a 100-gallon tank lasts for a generator depends on the generator's fuel consumption rate, typically measured in gallons per hour. For instance, if a generator consumes about 0.5 gallons per hour, a 100-gallon tank would last approximately 200 hours. However, if the generator uses 1 gallon per hour, the tank would last around 100 hours. Therefore, the actual duration will vary based on the specific generator's efficiency and load.