The Florida Department of Corrections makes inmate information available to the public through their official offender search tool. You can look up your friend's record, current facility, and projected release date directly on their website.
Use this link to search: http://www.dc.state.fl.us/OffenderSearch/Search.aspx
You can search by name or DC number, which is the inmate's Florida DOC identification number. The results will show you their current custody status, the facility where they are housed, their offense information, and their tentative release date if one has been calculated.
A few things worth knowing when reading the results. The release date listed is typically the tentative release date based on the sentence with good time credits applied. It can change if the inmate picks up disciplinary infractions that result in loss of gain time, or in the other direction if additional credits are applied. It is an estimate based on current standing, not a guaranteed date.
If the search does not return results or the information looks outdated, it is possible your friend is still in the classification and intake process, particularly if they were recently sentenced or transferred. In that case checking back in a few days usually resolves it.
For additional help locating an inmate in Florida or any other state, InmateAid's inmate locator is another resource worth bookmarking.