MST to GMT Converter

Mountain Standard Time → Greenwich Mean Time · MST is 7 hours behind GMT

MST
—
GMT
—

MST and GMT are the same time

MST to GMT Conversion Table

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

Green rows = business hours overlap (9:00 AM – 6:00 PM MST)

Major MST Cities
  • Denver, CO
  • Salt Lake City, UT
  • Albuquerque, NM
  • Tucson, AZ
  • Boise, ID
  • El Paso, TX
Major GMT Cities
  • London
  • Manchester
  • Edinburgh
  • Birmingham
  • Dublin
  • Cardiff
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MST vs GMT — Denver to London

MST (UTC-7) — Mountain Standard Time, covering Colorado, Utah, Montana, and surrounding states. Shifts to MDT (UTC-6) in summer. Arizona stays on MST year-round.

GMT (UTC+0) — UK winter time. London uses BST (UTC+1) from late March to late October.

Best overlap: 7:00–10:00 AM MST = 2:00–5:00 PM GMT. Denver mornings are the prime window for UK–Mountain US collaboration. Companies with Denver and London offices often schedule standing calls at 8:00 AM MST / 3:00 PM GMT.

Frequently Asked Questions

How many hours is MST behind GMT?

MST (Mountain Standard Time, UTC-7) is 7 hours behind GMT (UTC+0). During US Mountain Daylight Time (MDT, UTC-6), the gap shrinks to 6 hours behind GMT. During UK summer (BST, UTC+1), MST is 8 hours behind. The difference ranges from 6 to 8 hours depending on which region observes DST.

What is 9 AM MST in GMT?

9:00 AM MST (Denver) is 4:00 PM GMT (London). For Denver morning meetings, London is already in late afternoon. The best overlap window is 7:00–10:00 AM MST = 2:00–5:00 PM GMT — Denver mornings align with London mid-to-late afternoon.

What is the best time to schedule a Denver–London call?

The best window for Denver (MST) to London (GMT) calls is 7:00–10:00 AM MST = 2:00–5:00 PM GMT. In summer (MDT/BST): 8:00–11:00 AM MDT = 2:00–5:00 PM BST. Denver mornings catch London before the close of business.

What US states are in the MST time zone?

MST covers Colorado, Utah, Wyoming, Montana, most of Idaho, most of New Mexico, and the panhandle of Nebraska and Kansas. Arizona (except the Navajo Nation) uses MST year-round without DST. Nevada's Elko County is geographically in MST but officially observes PST.