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