The PMID : PMCID Converter is a new  tool on PubMed that allows for entry of a PubMed Indentifier number (PMID) for a work that is in PubMed Central in oder to find the associated PubMed Central Identifier number (PMCID), or vice versa.  The PMID : PMCID Converter also allows for entry of mulitple numbers as a batch process.

This tool will be useful for NIH-funded investigators in order to meet the requirements of the NIH Public Access Policy. Effective as of 25 May 2008, investigators are required to note the PMCID for any work that falls under the NIH Policy in NIH proposals, applications and progress reports.