MST to GMT Time Converter - Live World Clock
Convert time between Mountain Standard Time (MST) and Greenwich Mean Time (GMT). See current time with live clocks.
United States (MST)
United Kingdom (GMT)
Current Time Difference
MST is -7 hours behind GMT
(-7 hours during Daylight Saving Time)
What is MST (Mountain Standard Time)?
Mountain Standard Time (MST) used in western North America, UTC-7:00.
Countries and Regions Using MST
Primary Country:
- United States
- States: Colorado, Arizona, Utah, New Mexico
Also Used By:
- Canada - Alberta
- Mexico
Key Facts about MST:
- ✓ Arizona doesn't observe DST
- ✓ Major mountain resort areas
- ✓ Growing tech hub in Denver
- ✓ Major Cities: Denver, Phoenix, Albuquerque, Salt Lake City
- ✓ UTC Offset: -7:00 (-6:00 during MDT)
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)
MST to GMT Time Difference
Standard Time Difference:
MST is -7 hours behind
During Daylight Saving Time:
MST is -7 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 MST time zone?
United States is the primary country using MST (-7:00). Other countries include: Canada, Mexico.
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 MST ahead of GMT?
MST is -7 hours behind GMT. During Daylight Saving Time, the difference is -7 hours.
Does United States observe Daylight Saving Time?
Yes, United States observes Daylight Saving Time. During DST, MST changes to MDT (Mountain Daylight Time) with UTC offset of -6:00.