Indonesia’s coal reserves have increased slightly as of the end of 2019. If annual production remains around current levels, the reserves will last until 2090. Total coal reserves at the end of 2019 stood at 37.56 billion mt, up slightly from 37.34 billion mt at the end of 2018. Total reserves of low-calorific value coal stood at 14.4 billion mt at the end of last year, while reserves of mid-CV coal were at 20.3 billion mt. But reserves of high-CV coal stood at just 2.72 billion mt. Out of the 37.56 billion mt, 20.5 billion mt is classified as proven mineable reserves, with the remainder classified as estimated reserves. The bulk of the mineable reserves are located in Kalimantan province, with a total volume of 24.7 billion mt.

Coal reserves refer to coal that is currently extractable with current mining infrastructure, as opposed to coal resources, which refer to coal in areas that have yet to be developed.