TimeandTool

GMT to CST Converter

Greenwich Mean Time (UTC+1:00) → Central Standard Time (UTC-5:00)

GMT (Greenwich Mean Time)

04:04:55 PM

Sat, May 2, 2026

UTC+1

6 hours behind

CST (Central Standard Time)

10:04:55 AM

Sat, May 2, 2026

UTC-5

Time Difference

GMT offset
UTC+1:00
CST offset
UTC-5:00
Difference
6 hours behind
Best overlap
3 PM–4 PM / 9 AM–10 AM

Time Comparison

GMT (Greenwich Mean Time)Greenwich Mean Time4:04 PM
CST (Central Standard Time)Central Standard Time10:04 AM
12am
1am
2am
3am
4am
5am
6am
7am
8am
9am
10am
11am
12pm
1pm
2pm
3pm
NOW4pm
5pm
6pm
7pm
8pm
9pm
10pm
11pm
MAY 16pm-1d
7pm-1d
8pm-1d
9pm-1d
10pm-1d
11pm-1d
MAY 212am
1am
2am
3am
4am
5am
6am
7am
8am
9am
10am
11am
12pm
1pm
2pm
3pm
4pm
5pm
BusinessMorning/EveningDawn/DuskNight

24-Hour Conversion Table

Based on standard time (Jan 15 reference). Actual times may differ during DST transitions.

GMTCST
1:00 AM7:00 PM-1 day
2:00 AM8:00 PM-1 day
3:00 AM9:00 PM-1 day
4:00 AM10:00 PM-1 day
5:00 AM11:00 PM-1 day
6:00 AM12:00 AM
7:00 AM1:00 AM
8:00 AM2:00 AM
9:00 AM3:00 AM
10:00 AM4:00 AM
11:00 AM5:00 AM
12:00 PM6:00 AM
1:00 PM7:00 AM
2:00 PM8:00 AM
3:00 PM9:00 AM
4:00 PM10:00 AM
5:00 PM11:00 AM
6:00 PM12:00 PM
7:00 PM1:00 PM
8:00 PM2:00 PM
9:00 PM3:00 PM
10:00 PM4:00 PM
11:00 PM5:00 PM
12:00 AM6:00 PM-1 day

Highlighted rows indicate business hours (9 AM–5 PM) in GMT.

What is GMT?

Full name
Greenwich Mean Time
UTC offset
UTC+1:00
IANA timezone
Europe/London
Observes DST
Yes

What is CST?

Full name
Central Standard Time
UTC offset
UTC-5:00
IANA timezone
America/Chicago
Observes DST
Yes

Countries observing GMT

  • •United Kingdom (winter)
  • •Iceland
  • •Ghana
  • •Senegal
  • •Gambia
  • •Sierra Leone

Countries observing CST

  • •United States (Central)
  • •Canada (Prairie provinces)
  • •Mexico (most regions)

Frequently Asked Questions

GMT stands for Greenwich Mean Time. It is at UTC+1:00 and is observed in United Kingdom (winter), Iceland, Ghana.
CST stands for Central Standard Time. It is at UTC-5:00 and is observed in United States (Central), Canada (Prairie provinces), Mexico (most regions).
CST is 6 hours behind GMT. GMT is at UTC+1:00 and CST is at UTC-5:00.
GMT is 6 hours ahead CST.
Yes, GMT (Greenwich Mean Time) observes Daylight Saving Time. The UTC offset changes seasonally.
Yes, CST (Central Standard Time) observes Daylight Saving Time. The UTC offset changes seasonally.
GMT (Greenwich Mean Time) is used in: United Kingdom (winter), Iceland, Ghana, Senegal, Gambia, Sierra Leone.
The best overlap of business hours between GMT and CST is approximately 3 PM–4 PM / 9 AM–10 AM.

Related Converters

GMT to UTCGMT to ISTGMT to ESTGMT to PSTUTC to CSTIST to CSTEST to CSTPST to CST

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