Sentencing Advocacy Group · Federal planning tools
Federal Sentence Calculator
Estimate good-conduct time and explore First Step Act credit arithmetic, with the assumptions visible.
Read the assumptions before relying on a date.
Good-conduct time may be up to 54 days per year of the imposed sentence for eligible terms longer than one year, other than life. This estimate prorates sentence months at 54/12 and extra days at 54/365, rounds down, and subtracts your entered disallowance. Calendar months are added to the start date; end-of-month dates are clamped. The commencement day counts as a day served. BOP’s official anniversary and partial-year computation can differ.
FSA credits are separate. The 15-day rate requires qualifying minimum/low-risk assessments; offense exclusions and application rules also matter. Credits applied to supervised release are capped at 12 months. Prerelease custody uses separate conditions. RDAP and community placement are not automatically subtracted here.
Does a guilty plea automatically give me one day of custody credit?
No. This tool starts at zero. Use only qualifying custody credit supported by the record and BOP’s computation; the same detention time generally cannot be credited to another sentence as well.
Can this tell me when I will go to a halfway house or home confinement?
No. Prerelease custody and release from custody are different events. Placement decisions, eligible credits, available arrangements and individual circumstances require separate review. Use the RDAP preparation check and discuss release planning.
Sources & methodology
Source review: September 24, 2026. Check the linked official rules for updates and case-specific requirements.
From information to preparation
What does this mean for your situation?
A tool can organize a question. A defined engagement addresses the record, the next deadline and the work your circumstances require. Work directly with Joseph De Gregorio on sentencing preparation, pre-surrender planning or post-sentencing support.
Request a Private Case ReviewCall Joseph directly · (646) 588-8182
SAG provides consulting and preparation services, not legal representation. Legal advice and court filings require qualified counsel. No outcome is guaranteed.
These educational tools do not determine eligibility, predict a judge’s decision or replace the Bureau of Prisons’ official computation. Your tool inputs are processed in this page; this tool does not send the answers to SAG or add them to its analytics events.