How many hours is CST behind CLT?
As abbreviations, CLT is always 2 hours ahead of CST: CST is UTC−6 and CLT is UTC−4. To convert, add 2 hours.
Check which label you actually need: CLT (Chile Time is on UTC−3 today). A time written with an abbreviation that is not in use is usually meant as the local time, so convert between the places instead: right now CLT is 3 hours ahead of CST.
When the CST to CLT time difference changes
For most of the year CLT is 1 hour ahead of CST. From 1 November to 31 December 2026, CLT is 3 hours ahead of CST instead, because the two places change their clocks on different dates. Meetings booked by the usual gap land an hour off in those weeks.
| Dates | CLT vs CST | Length |
|---|---|---|
| 1 November 2026 to 31 December 2026 | 3 hours ahead | 61 days |
| 1 January 2027 to 13 March 2027 | 3 hours ahead | 72 days |
| 14 March 2027 to 3 April 2027 | 2 hours ahead | 21 days |
| 4 April 2027 to 4 September 2027 | 1 hour ahead | 154 days |
| 5 September 2027 to 6 November 2027 | 2 hours ahead | 63 days |
| 7 November 2027 to 31 December 2027 | 3 hours ahead | 55 days |
Best time for a meeting between CST and CLT
- When CLT is 1 hour ahead of CST: 7 shared office hours, 09:00 to 16:00 in CST (10:00 to 17:00 in CLT).
- When CLT is 3 hours ahead of CST: 5 shared office hours, 09:00 to 14:00 in CST (12:00 to 17:00 in CLT).
- When CLT is 2 hours ahead of CST: 6 shared office hours, 09:00 to 15:00 in CST (11:00 to 17:00 in CLT).