The HVS valuation manual hosted by eCornell defines a room night using one occupied room for one night, with one or more people in it. It is a unit of lodging demand. Two rooms occupied for three nights each represent six room nights. Source: HVS: Room night definition, page 9

Separate rooms from people

Keep room counts, night counts and guest numbers in separate columns when reviewing a group itinerary. Calculate each room’s nights before adding the total. This makes the accommodation requirement clear without treating a person and a room as interchangeable units.

State what the total represents

Label a report to show whether it concerns booked, occupied or available room nights and include the date range. Agree how cancellations are handled. This gives a colleague the information needed to interpret the number and compare it with another report.

Written and updated by Travelgenix. Sources checked on 19 October 2026. Practical advice and examples are Travelgenix editorial guidance.