CST to GMT Time Converter - Live World Clock

Convert time between Central Standard Time (CST) and Greenwich Mean Time (GMT). See current time with live clocks.

United States (CST)

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12:27:44 PM
Thursday, August 20, 2026

United Kingdom (GMT)

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06:27:44 PM
Thursday, August 20, 2026

Current Time Difference

CST is -6 hours behind GMT

(-6 hours during Daylight Saving Time)

What is CST (Central Standard Time)?

Central Standard Time (CST) covers central North America, UTC-6:00.

Countries and Regions Using CST

Primary Country:

  • United States
  • States: Texas, Illinois, Wisconsin, Tennessee, Missouri

Also Used By:

  • Mexico
  • Canada - Manitoba, Saskatchewan

Key Facts about CST:

  • ✓ Second largest US timezone
  • ✓ Major business centers in Chicago and Houston
  • ✓ DST observed March-November
  • ✓ Major Cities: Chicago, Houston, Dallas, San Antonio, Austin
  • ✓ UTC Offset: -6:00 (-5:00 during CDT)

What is GMT (Greenwich Mean Time)?

Greenwich Mean Time (GMT) is the reference point for world time zones, UTC+0:00.

Countries and Regions Using GMT

Primary Country:

  • United Kingdom

Also Used By:

  • Ireland
  • Portugal

Key Facts about GMT:

  • ✓ Prime meridian reference point
  • ✓ London financial center
  • ✓ Historical timekeeping standard
  • ✓ Major Cities: London, Manchester, Birmingham, Leeds, Glasgow
  • ✓ UTC Offset: +0:00 (+1:00 during BST)

CST to GMT Time Difference

Standard Time Difference:

CST is -6 hours behind

During Daylight Saving Time:

CST is -6 hours behind

Common Use Cases:

  • • Business meetings between United States and United Kingdom
  • • International collaboration across timezones
  • • Scheduling calls and conferences

Frequently Asked Questions

Which countries are in CST time zone?

United States is the primary country using CST (-6:00). Other countries include: Mexico, Canada.

Which countries are in GMT time zone?

United Kingdom is the primary country using GMT (+0:00). Other countries include: Ireland, Portugal.

How many hours is CST ahead of GMT?

CST is -6 hours behind GMT. During Daylight Saving Time, the difference is -6 hours.

Does United States observe Daylight Saving Time?

Yes, United States observes Daylight Saving Time. During DST, CST changes to CDT (Central Daylight Time) with UTC offset of -5:00.