--- title: "Calculation of a term of imprisonment" citation: "18 U.S.C. § 3585" authority_id: "AUTH-USC-18-3585" authority_type: "statute" jurisdiction: "federal_nationwide" precedential_status: "binding" official_url: "https://www.govinfo.gov/link/uscode/18/3585" url: "https://jason93.com/legal/federal-process/authorities/AUTH-USC-18-3585/" legal_review: "2026-08-25" links_checked: "2026-10-15" links_available: 1 links_checked_count: 1 license: "CC BY 4.0" --- # Calculation of a term of imprisonment ## Holding or rule used Federal sentence commencement and qualifying prior-custody credit without double credit. ## Material limitation Use only for the bounded proposition and limitations in the linked canonical modules. Individual custody, computation, program, placement, administrative, circuit, and remedy facts remain separate. ## Official source and pinpoints 18 U.S.C. § 3585, § 3585(a)–(b): ## Used in - [BOP Designation, Sentence Commencement, Aggregation, and Prior-Custody Credit](https://jason93.com/legal/federal-process/modules/80-sentence-execution-and-bop/designation-sentence-computation-and-prior-custody-credit.md) - [18 U.S.C. § 3632 — First Step Act Time Credits](https://jason93.com/legal/federal-process/modules/80-sentence-execution-and-bop/first-step-act-time-credits.md)