Prison Sentence Calculator

Estimate federal or state prison sentence ranges plus actual time to serve after good time credits, First Step Act credits, and RDAP.

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Step 1

Federal or state case?

Federal sentencing uses the USSG points table. State cases use each state's own grid, points, or offense-class system.

Federal vs. state prison sentences

Federal cases use one national framework — the U.S. Sentencing Guidelines. State cases vary: North Carolina, Pennsylvania, Minnesota, Washington, and Kansas use structured grids; other states rely on statutory ranges with judicial discretion. Required time-served percentages also differ by state and offense type.

For raw federal ranges see the Federal Sentencing Guidelines Chart, or estimate credits with the Good Time Calculator.

Frequently asked questions

How much time will I actually serve in prison?

Most federal inmates serve about 85% of the imposed sentence after Good Conduct Time, and less with First Step Act credits and RDAP. State time-served percentages vary — some states require 50%, 85%, or 100% depending on offense type.

Does this calculator work for state cases?

Yes. Select your state on the first step. Structured-grid states like North Carolina, Pennsylvania, Minnesota, Washington, and Kansas use published grids; other states use statutory ranges with a required time-served percentage.

What's the difference between jail and prison sentences?

Jail typically refers to short-term county custody (usually under one year) while prison refers to state or federal custody for longer sentences. This calculator focuses on prison sentence ranges from federal and state guidelines.

Can a judge sentence outside the calculated range?

Yes. Federal ranges are advisory since United States v. Booker (2005) — judges can vary above or below with reasons. State judges may depart from grid recommendations for aggravating or mitigating factors.

Educational estimate only — not legal advice. See Terms & Sources.