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Time zonesLive · DST-aware

GMT to MST Converter

See the current time in GMT (Greenwich) and MST (Denver) side by side, the exact time difference right now, and convert any time between the two zones.

Quick presets

GMT to MST Converter

GMT
Greenwich
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MST
Denver
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Uses your browser's built-in, DST-aware time-zone data.

ToolFeather · Intl API

About converting GMT to MST

Greenwich Mean Time (Greenwich) and Mountain Time (Denver) are in different time zones, so a meeting, call or stream that's convenient in one may be early or late in the other. The clocks above update live and account for daylight saving automatically, so the time difference you see is the real one for today — not a fixed number that goes stale twice a year.

To plan across the two, type a time into the GMT box (or tap a quick preset) and read the MST equivalent, including a "next day" or "previous day" note when the conversion crosses midnight. For any other pair of zones or cities, use the full timezone converter.

GMT vs MST: the time difference through the year

The gap between GMT and MST changes during the year because only one of them uses daylight saving.

PeriodDifference
Oct 23, 2026 – Oct 31, 2026MST 6 h behind GMT
Nov 1, 2026 – Mar 13, 2027MST 7 h behind GMT
Mar 14, 2027 – Oct 23, 2027MST 6 h behind GMT

Daylight-saving changes in the next year

ZoneDateOffsetChange
MSTNov 1, 2026UTC−6 → UTC−7Clocks go back 1 hour
MSTMar 14, 2027UTC−7 → UTC−6Clocks go forward 1 hour
MSTNov 7, 2027UTC−6 → UTC−7Clocks go back 1 hour

GMT to MST conversion table

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

Best time to meet

The two zones

GMT · Greenwich Mean Time

Greenwich Mean Time is UTC+0 all year. It is the base for world time; the UK uses GMT only in winter and switches to BST in summer.

MST · Mountain Time

Mountain Time is UTC−7 in winter (MST) and UTC−6 in summer (MDT) for Denver, Salt Lake City and Calgary. Most of Arizona stays on MST (UTC−7) all year.

Frequently asked questions

6 answers
What is the time difference between GMT and MST?
It's shown live at the top of this page (and it can change with daylight saving). The converter uses the current, DST-aware difference between Greenwich Mean Time and Mountain Time, so the time you see is always right for right now.
How do I convert GMT to MST?
Enter a time in the GMT box and the equivalent MST time appears instantly, adjusted for the current offset between the two zones — including a note if it lands on the previous or next day.
Is this GMT to MST converter accurate with daylight saving?
Yes. It uses your browser's built-in time-zone database (the IANA zones behind Greenwich and Denver), which tracks daylight-saving changes automatically, so the current times and difference are correct.
What time is it in Denver right now?
The live clock above shows the current time in Denver (MST), updating every second, alongside GMT.
Does the GMT to MST time difference change?
Yes. Over the next 12 months it is 6 h behind or 7 h behind, depending on the date — see the table of periods on this page.
What is a good meeting time for GMT and MST?
Office hours overlap from 3:00 PM to 5:00 PM GMT (9:00 AM to 11:00 AM MST).