—I can help locate that exact publication. Otherwise, the above covers the standard OWCP impairment rating process and what a “paper calculator” would typically be.

The OWCP impairment rating formula is based on the AMA Guides and involves the following steps:

The OWCP Impairment Rating Calculator is a tool designed to assist healthcare providers and claims examiners in calculating the impairment rating of a claimant's condition under the Federal Employees' Compensation Act (FECA) and the Office of Workers' Compensation Programs (OWCP) guidelines.