GMT to Chicago Time Converter
Convert Greenwich Mean Time to Chicago instantly.
Scroll the timeline to check any hour of the day.
Greenwich Mean Time
GMT
6:06
Chicago
CST
1:06
Chicago is on daylight savings (CDT) right now, while GMT stays at UTC+0 all year.
Search any city, build a custom world clock, and plan across more time zones and options in the FlutterTime app. Free.
How the GMT to Chicago time difference works
Chicago is 5 hours behind GMT. Greenwich Mean Time (GMT) is the fixed UTC+0 reference time, used by the United Kingdom and Ireland in winter. Chicago (CST) is a city in United States. For example, 9:00 AM GMT is 4:00 AM Chicago. Scroll the timeline above to convert any moment, or use the chart below for a quick reference.
Time difference
5 hours
Daylight saving
Chicago only
GMT offset
UTC+0
Chicago offset
UTC-6
GMT to Chicago conversion chart
| Greenwich Mean Time (GMT) | Chicago (CST) |
|---|---|
| 12:00 AM | 7:00 PM -1 day |
| 1:00 AM | 8:00 PM -1 day |
| 2:00 AM | 9:00 PM -1 day |
| 3:00 AM | 10:00 PM -1 day |
| 4:00 AM | 11:00 PM -1 day |
| 5:00 AM | 12:00 AM |
| 6:00 AM | 1:00 AM |
| 7:00 AM | 2:00 AM |
| 8:00 AM | 3:00 AM |
| 9:00 AM | 4:00 AM |
| 10:00 AM | 5:00 AM |
| 11:00 AM | 6:00 AM |
| 12:00 PM | 7:00 AM |
| 1:00 PM | 8:00 AM |
| 2:00 PM | 9:00 AM |
| 3:00 PM | 10:00 AM |
| 4:00 PM | 11:00 AM |
| 5:00 PM | 12:00 PM |
| 6:00 PM | 1:00 PM |
| 7:00 PM | 2:00 PM |
| 8:00 PM | 3:00 PM |
| 9:00 PM | 4:00 PM |
| 10:00 PM | 5:00 PM |
| 11:00 PM | 6:00 PM |
Best time to meet
A standard 9 to 5 workday overlaps from 2:00 PM to 5:00 PM GMT (9:00 AM to 12:00 PM Chicago). Schedule inside that window to catch both coasts during business hours.
Cities in each time zone
Greenwich Mean Time (GMT)
LondonDublinLisbonEdinburghManchester
Chicago (CST)
HoustonDallasAustinSan AntonioFort WorthLincoln (Nebraska)
GMT to Chicago questions
Is Chicago ahead of or behind GMT?
Chicago is 5 hours behind GMT. So 9:00 AM GMT is 4:00 AM Chicago, and 5:00 PM GMT is 12:00 PM Chicago.
What time is it in Chicago when it is 12:00 PM GMT?
When it is 12:00 PM (noon) GMT in Greenwich Mean Time, it is 7:00 AM Chicago in Chicago.
How many hours difference is there between GMT and Chicago?
There is a 5 hours difference. Chicago (CST) runs 5 hours behind Greenwich Mean Time (GMT).
Do GMT and Chicago observe daylight saving time?
Chicago observes daylight saving time but Greenwich Mean Time does not, so the difference between them changes by an hour twice a year. The United Kingdom and Ireland use GMT only in winter; from late March to late October they switch to British Summer Time (BST), one hour ahead of GMT.
What is the best time to schedule a meeting between GMT and Chicago?
A standard 9-to-5 workday overlaps from 2:00 PM to 5:00 PM GMT (9:00 AM to 12:00 PM Chicago). Scheduling inside that window keeps the call during business hours in both Greenwich Mean Time and Chicago.
Which cities use GMT and Chicago?
Greenwich Mean Time (GMT) covers cities such as London, Dublin, Lisbon, Edinburgh, Manchester. Chicago (CST) covers cities such as Houston, Dallas, Austin, San Antonio, Fort Worth, Lincoln (Nebraska).