EST to MST Converter

Eastern Standard Time → Mountain Standard Time · EST is 2 hours ahead of MST

EST
—
MST
—

EST and MST are the same time

EST to MST Conversion Table

ESTMST
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 EST)

Major EST Cities
  • New York, NY
  • Miami, FL
  • Boston, MA
  • Atlanta, GA
  • Washington D.C.
  • Philadelphia, PA
Major MST Cities
  • Denver, CO
  • Salt Lake City, UT
  • Albuquerque, NM
  • Tucson, AZ
  • Boise, ID
  • El Paso, TX
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EST vs MST — What You Need to Know

Eastern Standard Time (EST) is UTC-5, covering the US East Coast. During summer it shifts to EDT (UTC-4).

Mountain Standard Time (MST) is UTC-7, covering Colorado, Utah, Montana, and neighboring states. During Daylight Saving Time it becomes MDT (UTC-6).

The difference is always 2 hours. A 5 PM ET close of business is 3 PM MT — giving Mountain Time employees a bit more afternoon flexibility.

Frequently Asked Questions

How many hours is EST ahead of MST?

EST (Eastern Standard Time, UTC-5) is 2 hours ahead of MST (Mountain Standard Time, UTC-7). When it is 9:00 AM EST in New York, it is 7:00 AM MST in Denver. Both zones shift simultaneously for DST, keeping the 2-hour difference constant year-round.

When it is 9:00 AM EST, what time is it MST?

When it is 9:00 AM EST, it is 7:00 AM MST. EST is always 2 hours ahead of MST.

What is the time difference between New York and Denver?

New York (Eastern Time) is 2 hours ahead of Denver (Mountain Time) year-round. Both cities observe Daylight Saving Time on the same schedule, so the gap stays at 2 hours in both winter (EST vs MST) and summer (EDT vs MDT).