The conservation status of an ecosystem can be measured by its ecological value. As part of a series of regulations within the framework of the National Environmental Impact Assessment System, the Environment Ministry of Peru has published the methodologie to calculate the ecological value of highland ecosistems in the "Complementary Guide for Environmental Compensation: High Andean Ecosystems”. Currently, there are guides for assessing the status of conservation of certain types of ecosystems; however, there is still no guide that defines the ecological indicators and attributes for coastal wetlands. This study proposes eight indicators, considered as suitable for calculating the ecological value of coastal wetlands in Peru, selected through a suitability index. As an application example, the ecological value of four wetlands in Lima and Callao were calculated: Pantanos de Villa, Vent...