MST to US Time Converter
EST is 2 hours ahead of MST. 9:00 AM MST = 11:00 AM EST.
EST is 2 hours ahead of MST. To convert MST to US Time, add 2 hours to the MST time: 9:00 AM MST = 11:00 AM EST.
MST (Mountain Time) is used in Denver, Salt Lake City, Albuquerque, Calgary, Edmonton; Phoenix (Arizona) all year. US Time (US time) is used in United States.
Most of Arizona uses MST all year and does not switch to MDT.
MST to US Time time conversion table
MST to US Time on 6 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| MST | US Time | Day |
|---|---|---|
| 12:00 AM MST | 2:00 AM EST | night |
| 1:00 AM MST | 3:00 AM EST | night |
| 2:00 AM MST | 4:00 AM EST | night |
| 3:00 AM MST | 5:00 AM EST | night |
| 4:00 AM MST | 6:00 AM EST | — |
| 5:00 AM MST | 7:00 AM EST | — |
| 6:00 AM MST | 8:00 AM EST | — |
| 7:00 AM MST | 9:00 AM EST | — |
| 8:00 AM MST | 10:00 AM EST | — |
| 9:00 AM MST | 11:00 AM EST | work hours |
| 10:00 AM MST | 12:00 PM EST | work hours |
| 11:00 AM MST | 1:00 PM EST | work hours |
| 12:00 PM MST | 2:00 PM EST | work hours |
| 1:00 PM MST | 3:00 PM EST | work hours |
| 2:00 PM MST | 4:00 PM EST | work hours |
| 3:00 PM MST | 5:00 PM EST | — |
| 4:00 PM MST | 6:00 PM EST | — |
| 5:00 PM MST | 7:00 PM EST | — |
| 6:00 PM MST | 8:00 PM EST | — |
| 7:00 PM MST | 9:00 PM EST | — |
| 8:00 PM MST | 10:00 PM EST | night |
| 9:00 PM MST | 11:00 PM EST | night |
| 10:00 PM MST | 12:00 AM EST | next day |
| 11:00 PM MST | 1:00 AM EST | next day |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert MST to US Time
Add 2 hours to the MST time to get US Time.
Example: 9:00 AM MST = 11:00 AM EST.
Across midnight: 10:00 PM MST = 12:00 AM EST (next day). The date changes, so always check the day as well as the hour.
Time difference between MST and US Time
The time difference between MST and US Time is 2 hours all year – EST is ahead of MST.
MST and US Time during daylight saving time
- MST next changes on 14 Mar 2027: clocks go forward one hour at 01:59 local time, from MST (UTC−7) to MDT (UTC−6).
- US Time next changes on 14 Mar 2027: clocks go forward one hour at 01:59 local time, from EST (UTC−5) to EDT (UTC−4).
Best time for a meeting between MST and US Time
MST and US Time share 6 hours of the 9 AM–5 PM working day. Any time between 9:00 AM and 3:00 PM MST lands between 11:00 AM and 5:00 PM EST, inside working hours for both.
MST to US Time FAQ
What is the time difference between MST and US Time?
EST is 2 hours ahead of MST all year. 9:00 AM MST = 11:00 AM EST.
What is 9 AM MST in US Time?
9:00 AM MST is 11:00 AM EST.
What is 12 PM (noon) MST in US Time?
12:00 PM MST is 2:00 PM EST.
Is US Time ahead of or behind MST?
EST is 2 hours ahead of MST, so it is later in US Time than in MST.
Does MST change for daylight saving time?
Yes. MST next changes on 14 Mar 2027, when clocks go forward one hour from MST to MDT.
Does US Time change for daylight saving time?
Yes. US Time next changes on 14 Mar 2027, when clocks go forward one hour from EST to EDT.
What is the best time for a meeting between MST and US Time?
MST and US Time share 6 hours of the 9 AM–5 PM working day. Any time between 9:00 AM and 3:00 PM MST lands between 11:00 AM and 5:00 PM EST, inside working hours for both.
Is MT the same as MST?
MST is the winter (standard) name of Mountain Time (MT). From March to November the same clocks are called MDT. This converter always uses the one in force on the date you choose.
Related conversions
Convert US Time to MST
Convert MST to other time zones
Convert other time zones to US Time
Learn more
Updated 6 November 2026. Time zone data: IANA tz database.