Record Group Explorer Data
About the Record Group Explorer Numbers
The Record Group Explorer data visualization is based on a count of the scans of textual pages available through the National Archives Catalog and an estimate of the total number of textual pages currently in NARA's holdings. Numbers will be updated monthly to reflect new additions to the Catalog and future iterations of the Explorer will provide additional data on records types other than textual records.
How Record Group Explorer Numbers are Calculated
The number of scans online uses file counts accessed via the National Archives Catalog API.
The estimated total pages in each Record Group is calculated by taking the volume of textual records (in cubic feet) and multiplying by an average of 2,500 pages of records per cubic foot. The 2,500 page average coming from historical capacity estimates for a Federal Records Center (FRC) box used to store archival documents.
The percent of scanned textual pages online equals scans online / estimated total pages
This table provides the full set of data powering the Record Group Explorer (Learn more about these numbers). Clicking on the column headers sorts the data and the entire table is searchable. Record Group titles only have an active link when there is material online in the National Archives Catalog.