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
9:25
Chicago
CST
3:25
GMT and Chicago are on daylight savings right now, shown as BST and CDT.
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How the GMT to Chicago time difference works
Chicago is 6 hours behind GMT. Greenwich Mean Time (GMT) is the time zone of the United Kingdom and Ireland. Chicago (CST) is a city in United States. For example, 9:00 AM GMT is 3:00 AM Chicago. Scroll the timeline above to convert any moment, or use the chart below for a quick reference.
Time difference
6 hours
Daylight saving
Both observe
GMT offset
UTC+0
Chicago offset
UTC-6
GMT to Chicago conversion chart
| Greenwich Mean Time (GMT) | Chicago (CST) |
|---|---|
| 12:00 AM | 6:00 PM -1 day |
| 1:00 AM | 7:00 PM -1 day |
| 2:00 AM | 8:00 PM -1 day |
| 3:00 AM | 9:00 PM -1 day |
| 4:00 AM | 10:00 PM -1 day |
| 5:00 AM | 11:00 PM -1 day |
| 6:00 AM | 12:00 AM |
| 7:00 AM | 1:00 AM |
| 8:00 AM | 2:00 AM |
| 9:00 AM | 3:00 AM |
| 10:00 AM | 4:00 AM |
| 11:00 AM | 5:00 AM |
| 12:00 PM | 6:00 AM |
| 1:00 PM | 7:00 AM |
| 2:00 PM | 8:00 AM |
| 3:00 PM | 9:00 AM |
| 4:00 PM | 10:00 AM |
| 5:00 PM | 11:00 AM |
| 6:00 PM | 12:00 PM |
| 7:00 PM | 1:00 PM |
| 8:00 PM | 2:00 PM |
| 9:00 PM | 3:00 PM |
| 10:00 PM | 4:00 PM |
| 11:00 PM | 5:00 PM |
Best time to meet
A standard 9 to 5 workday overlaps from 3:00 PM to 5:00 PM GMT (9:00 AM to 11:00 AM 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 6 hours behind GMT. So 9:00 AM GMT is 3:00 AM Chicago, and 5:00 PM GMT is 11:00 AM 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 6:00 AM Chicago in Chicago.
How many hours difference is there between GMT and Chicago?
There is a 6 hours difference. Chicago (CST) runs 6 hours behind Greenwich Mean Time (GMT).
Do GMT and Chicago observe daylight saving time?
Both Greenwich Mean Time and Chicago observe daylight saving time, but they switch on different dates, so the gap briefly shifts by an hour around the spring and autumn changeovers.
What is the best time to schedule a meeting between GMT and Chicago?
A standard 9-to-5 workday overlaps from 3:00 PM to 5:00 PM GMT (9:00 AM to 11:00 AM 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).