MST to GMT Time Converter
Greenwich Mean Time (GMT) is currently 7 hours ahead of Mountain Standard Time (MST). MST is UTC-7 and GMT is UTC+0. The table below converts every hour of the day between the two, and the call planner shows where working hours line up.
Best Time for a Call
Both sides are inside 9:00 AM to 5:00 PM office hours between 9:00 AM and 10:00 AM in MST, which is 4:00 PM to 5:00 PM in GMT.
Comparing more than two places? The Overlap Zones tool shows working hours for several cities on one grid.
Hour by Hour: MST to GMT
Rows marked office hours fall between 9:00 AM and 5:00 PM in both places. For a specific date, use the interactive converter.
Does the Difference Change During the Year?
MST and GMT are fixed offsets, so the difference between them never changes.
MST is UTC-7. Most of the Mountain region switches to MDT (UTC-6) in summer, but Arizona stays on MST year round.
GMT is UTC+0 and never shifts. The UK is on GMT in winter but moves to BST (UTC+1) from late March to late October.
Frequently Asked Questions
How many hours ahead is GMT compared to MST?
GMT is currently 7 hours ahead of MST. MST and GMT are fixed offsets, so the difference between them never changes.
What time is 9:00 AM in MST in GMT?
9:00 AM in MST is 4:00 PM in GMT.
What is the best time for a call between MST and GMT?
Both sides are inside 9:00 AM to 5:00 PM office hours between 9:00 AM and 10:00 AM in MST, which is 4:00 PM to 5:00 PM in GMT.