How much time is left on the sentence?

Time in custody before sentencing often counts against the sentence, and many states add good-time credit on top. Enter the sentence, the days already served, and the rate that applies to see roughly how much time is left.

Include time held before sentencing if the court credited it.
Commonly 1. Enter 0 if the offence earns no credit.
A percentage of credited time. Often 0-15%. Enter 0 if none applies.

This tool runs entirely in your browser. Nothing you enter is transmitted or stored.

How this works

Three things reduce a sentence: time served in custody before sentencing, any statutory credit the state awards for that time, and good-time credit earned while in custody.

Credit rules are set by state law and by the sentence itself. Some offences earn no credit at all, some earn day-for-day, and a few earn more. Good-time credit is usually a percentage of time served and can be forfeited for disciplinary infractions.

Months are converted at 30.4375 days, the average month length across a year. That is accurate enough for planning and not accurate enough to rely on for a legal deadline.

Where the defaults come from

Every rate in this tool is editable. The starting values are the most common figures we could source, and you should replace them with the actual figures that apply to your jurisdiction.

Frequently asked questions

Does time in jail before sentencing count toward the sentence?

In many jurisdictions, yes. The sentencing court usually applies credit for time served, but whether it applies and at what rate is set by state law or by the court at sentencing. Some offences are excluded.

What is good-time credit?

A reduction earned for complying with prison rules, usually expressed as a percentage of time served. It can be forfeited for disciplinary infractions and is not available for every offence.

Is this the release date the prison will use?

No. This is arithmetic on the figures you entered. The corrections department calculates the actual date using its own records, statutory credits and any court orders, and its figure governs.

Why 30.4375 days per month?

That is the average month length across a 365.25-day year. Using a flat 30 would drift by several days a year, which matters over a multi-year sentence.

What if the sentence is in years rather than months?

Multiply the years by twelve and enter that. For example, a four-year sentence is 48 months.

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