The Kadmat Island is long and narrow. It is only 0.57 km wide at the broadest point having maximum length of 11 km. It lies between 11° 10' and 11° 16' N latitude and 72° 45' and 72° 48' E longitude, having an area of 3.20 sq km. This island is at a distance of 407 km (220 nautical mil from Kochi and located between Amini Island in the south and Chetlat Island in the north.