Background The ITINERIS scale on the rights of persons with intellectual disabilities (ISRPID) was developed to measure the extent to which people with intellectual disabilities (ID) exercise their rights. Method The ISRPID was produced through a virtual Delphi group with 37 professionals and relatives of people with ID from four continents and was refined in small pilot groups with persons with ID in Argentina. It has 30 items and can be self-administered or completed by a proxy. Versions in three languages (English, Spanish and Portuguese) are available. Following its development, the ISRPID was applied in Chile to 705 persons with ID and to a control group of 524 college students without ID. Results Statistical analysis showed that family relationships, community participation, living arrangements and level of disability affect the experience of rights among people with ID. Importantly, with structured supports, people with ID appear able to exercise their rights to a level comparable to that of their peers without ID. Conclusions With further development, the ISRPID may be an appropriate scale to monitor the exercise of rights contained in the United Nations Convention on the Rights of Persons with Disabilities at an individual or group level.