The average school bus in America has a fuel tank capacity of between 60 and 100 gallons. There are many different types of school buses on the road, contributing to this variance.
The largest models of school buses in service typically have the largest fuel tanks. Large 44-passenger buses typically have a fuel tank capacity of 60-100 gallons. Smaller models have fuel tanks of 30-35 gallons. Alternative fuel fleets are also becoming more popular, using fuels including natural gas or propane. Buses using these types of fuel typically have smaller fuel tank capacities because they get more miles per gallon of fuel.