MeetingTimePro

MST to EST converter

Mountain Time to Eastern Time. EST is 2 h ahead of MST all year.

From

MST · Denver MDT · UTC−6

  • EST · New YorkEDT · UTC−4 · 2 h ahead
    11:00Mon, Sep 28
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The gap between MST and EST

2026MST clocksEST clocksDifference
JanuaryMST UTC−7EST UTC−52 h ahead
JulyMDT UTC−6EDT UTC−42 h ahead

Neither clock changes relative to the other, so this gap holds all year.

Convert the other way: EST to MST · Plan a meeting across more places

MST to EST time table

Every hour of the MST day and the matching EST time, for a mid-January and a mid-July date (they are identical, since the gap never changes).

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

About these two clocks

MST — Mountain Time. Used in Denver, Salt Lake City, Calgary. MST is the winter name; summer is MDT (UTC−6). Arizona stays on MST all year, so Phoenix differs from Denver in summer.

EST — Eastern Time. Used in New York, Toronto, Miami, Atlanta. Strictly, EST is the winter name; from March to November the same clocks show EDT (UTC−4). This page follows the clocks, so summer dates use EDT.

All figures on this page come from the IANA time zone database (the same data your phone and laptop use), evaluated for the date in question. Abbreviations are ambiguous — “IST” also means Irish or Israel Standard Time, and “CST” is China Standard Time in Asia — so this page uses America/Denver and America/New_York explicitly.

Questions people ask

How many hours ahead or behind is EST compared with MST?

EST is 2 h ahead of MST all year, because the offset between the two clocks does not change.

What is 9 am MST in EST?

On a January date, 9:00 am MST is 11:00 AM EST. Use the converter above for any other date.

Which cities use MST?

Mountain Time (MST) is used in Denver, Salt Lake City, Calgary. MST is the winter name; summer is MDT (UTC−6). Arizona stays on MST all year, so Phoenix differs from Denver in summer.

Which cities use EST?

Eastern Time (EST) is used in New York, Toronto, Miami, Atlanta. Strictly, EST is the winter name; from March to November the same clocks show EDT (UTC−4). This page follows the clocks, so summer dates use EDT.

When is a good time for a MST–EST call?

Look for the hours where both columns in the table fall between about 8 am and 6 pm. If none exist, the meeting planner on our home page shows the least-bad options and lets you share a link that converts for every attendee.

Related conversions

UTC to ESTPST to ESTCST to ESTIST to ESTGMT to ESTCET to ESTBST to ESTMST to PSTJST to ESTAEST to EST