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BlogHow it works

PST to MST Converter

Choose a Pacific time to see the Mountain Time in Denver, Salt Lake City, Albuquerque or Boise. The converter follows Denver, which changes clocks on the same dates as California.

Pacific Time

PSTPacific Time

MSTMountain Time

––:––

What is the difference between PST and MST?

Mountain Time is 1 hour ahead of Pacific Time in Denver and Salt Lake City all year. Arizona is the exception: it matches California from March to November.

PST / PDT
UTC−8 / UTC−7
MST / MDT
UTC−7 / UTC−6
Arizona
UTC−7, all year

Pacific to Mountain hour table

PST timeMST/MDT time
12:00 AM1:00 AM
1:00 AM2:00 AM
2:00 AM3:00 AM
3:00 AM4:00 AM
4:00 AM5:00 AM
5:00 AM6:00 AM
6:00 AM7:00 AM
7:00 AM8:00 AM
8:00 AM9:00 AM
9:00 AM10:00 AM
10:00 AM11:00 AM
11:00 AM12:00 PM
12:00 PM1:00 PM
1:00 PM2:00 PM
2:00 PM3:00 PM
3:00 PM4:00 PM
4:00 PM5:00 PM
5:00 PM6:00 PM
6:00 PM7:00 PM
7:00 PM8:00 PM
8:00 PM9:00 PM
9:00 PM10:00 PM
10:00 PM11:00 PM
11:00 PM12:00 AM+1 next day
Each Pacific hour with the Denver time one hour later. The 11:00 PM Pacific row is already midnight on the next day in Denver.

Neighbors on the same schedule

Pacific and Mountain Time follow the same federal daylight saving rule, overseen by the US Department of Transportation: clocks change at 2:00 AM local time on the second Sunday of March and on the first Sunday of November. Since Denver changes one hour earlier in real time, the gap is briefly 2 hours in March and zero in November, for that one hour only.

For everything else, the rule is simple: add one hour to a Los Angeles, Seattle or Las Vegas time to get the time in Denver, Salt Lake City or Albuquerque.

Arizona and other edge cases

Most of Arizona stays on Mountain Standard Time, UTC−7, all year. During US daylight saving California is on PDT, which is also UTC−7, so Phoenix and Los Angeles read the same. In winter Phoenix is one hour ahead again. The Navajo Nation in northeastern Arizona follows daylight saving like Denver.

Idaho and Oregon are split states: northern Idaho is on Pacific Time and a small corner of eastern Oregon is on Mountain Time. Check the town when a contact lives near those lines.

Simple parts

  • Add one hour, all year, for Denver, Utah and New Mexico.
  • Workdays overlap for seven hours.
  • Both zones change on the same weekends.

Tricky parts

  • Phoenix flips between 0 and 1 hour ahead every spring and fall.
  • Split states make the state name unreliable.
  • MST in a summer invite may mean Arizona or Denver; ask which.

The Denver, Seattle and Vancouver clocks show the live times. Starting from Denver, use MST to PST; for the Central zone, see PST to CST.

PST to MST questions

How many hours ahead of Pacific Time is Mountain Time?

Mountain Time is 1 hour ahead of Pacific Time. Noon in Los Angeles is 1:00 PM in Denver.

Is Phoenix ahead of Los Angeles?

Only in winter, by 1 hour. From March to November Phoenix and Los Angeles show the same time, because Arizona does not use daylight saving.

What is 8:00 AM PST in MST?

8:00 AM Pacific is 9:00 AM Mountain.

Is Salt Lake City on Mountain Time?

Yes. All of Utah uses Mountain Time with daylight saving, the same as Denver.

Which part of Idaho is on Pacific Time?

The northern panhandle, including Coeur d'Alene, uses Pacific Time. Boise and southern Idaho use Mountain Time.