How much fuel does a cruise ship use?

== Dollars and Cents== To put it in perspective, the fleet of U.S. flagged ships sailing interisland Hawaiian cruises (spending 96 hours of the week idle in port) run a price tag of nearly $250,000 a week to fuel each vessel, lifeboats and tender boats. These ships range from about 70,000 tons - 93.000 tons. Most cruise ships are at sea much more than this, and use more fuel from week to week. Much depends on itinerary, sea conditions, weight and other variables. It depends on how large the cruise ship is, what weight it carries (other than passengers) etc. It can be less than 80,000 gallons or more.