Sentence (Release Date) Calculator
Calculate a release date from a sentence length, credit for time served, and a good-time reduction percentage.
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How to use this tool
- Enter the date the sentence began and its length in years, months, and days.
- Enter any credit for time already served before sentencing.
- Enter a good-time reduction percentage if one applies, then read the estimated release date.
This calculator estimates a release date from a sentence length, any credit already earned for time served, and a good-time (good-behavior) reduction percentage. It's the same arithmetic used by many state corrections and legal-aid sites — enter your own figures to see an estimate, not a guarantee.
Frequently asked questions
- What is 'good-time' credit?
- Many jurisdictions reduce a sentence for good behavior — common examples are 'day-for-day' (50% off) or an '85% law' (15% off). Check your specific jurisdiction's rules, since they vary widely.
- Is this an official release date?
- No — this is an estimate based on the numbers you enter. Actual release dates depend on jurisdiction-specific rules, parole board decisions, and case-by-case credit calculations that only the court or corrections agency can confirm.