MST to GMT Time Converter
Convert Mountain Time to Greenwich Mean Time instantly.
Scroll the timeline to check any hour of the day.
Mountain Time
MST
12:06
Greenwich Mean Time
GMT
6:06
MST is on daylight savings (MDT) 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 MST to GMT time difference works
GMT is 6 hours ahead of MST. Mountain Time (MST) is the US Mountain time zone. Greenwich Mean Time (GMT) is the fixed UTC+0 reference time, used by the United Kingdom and Ireland in winter. For example, 9:00 AM MST is 3:00 PM GMT. Scroll the timeline above to convert any moment, or use the chart below for a quick reference.
Time difference
6 hours
Daylight saving
MST only
MST offset
UTC-7
GMT offset
UTC+0
MST to GMT conversion chart
| Mountain Time (MST) | Greenwich Mean Time (GMT) |
|---|---|
| 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 | 12:00 AM +1 day |
| 7:00 PM | 1:00 AM +1 day |
| 8:00 PM | 2:00 AM +1 day |
| 9:00 PM | 3:00 AM +1 day |
| 10:00 PM | 4:00 AM +1 day |
| 11:00 PM | 5:00 AM +1 day |
Best time to meet
A standard 9 to 5 workday overlaps from 9:00 AM to 11:00 AM MST (3:00 PM to 5:00 PM GMT). Schedule inside that window to catch both coasts during business hours.
Cities in each time zone
Mountain Time (MST)
DenverSalt Lake CityAlbuquerqueBoiseColorado Springs
Greenwich Mean Time (GMT)
LondonDublinLisbonEdinburghManchester
MST to GMT questions
Is GMT ahead of or behind MST?
GMT is 6 hours ahead of MST. So 9:00 AM MST is 3:00 PM GMT, and 5:00 PM MST is 11:00 PM GMT.
What time is it in GMT when it is 12:00 PM MST?
When it is 12:00 PM (noon) MST in Mountain Time, it is 6:00 PM GMT in Greenwich Mean Time.
How many hours difference is there between MST and GMT?
There is a 6 hours difference. Greenwich Mean Time (GMT) runs 6 hours ahead of Mountain Time (MST).
Do MST and GMT observe daylight saving time?
Mountain Time 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 MST and GMT?
A standard 9-to-5 workday overlaps from 9:00 AM to 11:00 AM MST (3:00 PM to 5:00 PM GMT). Scheduling inside that window keeps the call during business hours in both Mountain Time and Greenwich Mean Time.
Which cities use MST and GMT?
Mountain Time (MST) covers cities such as Denver, Salt Lake City, Albuquerque, Boise, Colorado Springs. Greenwich Mean Time (GMT) covers cities such as London, Dublin, Lisbon, Edinburgh, Manchester.