PST vs MST Time Difference

How to Find the Time Difference Between PST and MST

PST (Pacific Standard Time, UTC-8) is one hour behind MST (Mountain Standard Time, UTC-7).

Looking for Pitcairn Standard Time? See /time-converter/pst-pitcairn-time-zone.

1. Open the PST vs MST converter: Visit https://www.xconvert.com/time-converter/pst-vs-mst to see Pacific Standard Time and Mountain Standard Time compared on a visual 24-hour grid. This view is useful when you are scheduling a call between teams on the U.S. West Coast and Mountain states, planning support coverage across Canada, Mexico, and the United States, or lining up travel timing across nearby business hubs.

2. Add comparison cities with + Add City: Click + Add City and add places that commonly work with Pacific Standard Time and Mountain Standard Time, such as Los Angeles, Phoenix, Denver, or Calgary, depending on your business or travel route. This helps remote teams in software, customer support, logistics, and regional sales see whether a Pacific Standard Time morning meeting lands in Mountain Standard Time work hours or pushes into lunch or evening.

3. Drag across the grid to select a meeting window: Click Select, then drag across the colored timeline to highlight a range in purple; you can move the selection by dragging the center or resize it with the left and right handles. For example, if you drag a slot starting at 9:00 PST, the grid shows 10:00 MST; if you compare 12:00 PST, it lines up with 13:00 MST, which is helpful when confirming that a noon West Coast check-in starts at 1 PM in Mountain Standard Time.

4. Pick a date and export the result: Use the date picker row at the top to choose the specific day you want to compare, then export the selected range with ICS download, Google Calendar, Gmail, Copy to clipboard, or Share link. These options are practical when you need to send a confirmed meeting slot to a distributed operations team, create a calendar hold for a regional sales call, or share a travel coordination window with colleagues in different states or provinces.

PST vs MST Offset Explained

Pacific Standard Time is UTC-8, while Mountain Standard Time is UTC-7. That means MST is 1 hour ahead of PST, or viewed the other way, PST is 1 hour behind MST. In practical scheduling terms, when it is 9:00 PST, it is 10:00 MST, and when it is 18:00 PST, it is 19:00 MST.

Pacific Standard Time and Mountain Standard Time are both standard-time abbreviations, not year-round labels for every season. Pacific Standard Time uses PDT as its daylight saving counterpart, and Mountain Standard Time uses MDT as its daylight saving counterpart. This matters for business calls, travel planning, and shift coordination because a meeting labeled specifically in Pacific Standard Time or Mountain Standard Time should be interpreted as standard time, not automatically as the daylight version.

Both Pacific Standard Time and Mountain Standard Time are used in Canada, Mexico, and the United States, so the comparison is relevant for cross-border operations as well as domestic scheduling. Companies coordinating customer service windows, trucking dispatch, regional retail operations, and construction crews often need a fast visual comparison because even a one-hour difference can affect opening times, handoffs, and same-day deadlines. A Pacific Standard Time afternoon handoff at 15:00 PST reaches a Mountain Standard Time team at 16:00 MST, which can be important when the receiving team is nearing the end of its workday.

Common PST to MST Conversion Examples

Pacific Standard Time stays consistently one hour behind Mountain Standard Time in the comparison used on this page. That makes the most common conversions straightforward for recurring meetings, interview scheduling, and regional operations planning.

• 9:00 PST = 10:00 MST
• 12:00 PST = 13:00 MST
• 15:00 PST = 16:00 MST
• 18:00 PST = 19:00 MST

These examples are especially useful for teams that work across western North America. A support lead in Pacific Standard Time can quickly see that a 9:00 PST start is a 10:00 MST start for a Mountain Standard Time colleague, while a late-day review at 18:00 PST becomes 19:00 MST, which may be outside normal office hours for finance, legal, or administrative staff.

When to Use PST vs MST for Scheduling

Pacific Standard Time and Mountain Standard Time are close enough that people often underestimate the impact of the one-hour gap. In practice, that gap affects daily standups, warehouse cutoffs, medical appointment coordination, airport pickup timing, and webinar attendance, especially when one side starts early and the other side already has a full morning underway.

For remote team coordination, the one-hour difference is usually easiest to manage in the late morning or early afternoon. A meeting at 12:00 PST becomes 13:00 MST, which often fits well for product, sales, and account management teams that need overlap without forcing a very early Pacific Standard Time start or a late Mountain Standard Time finish. For travel planning, the same comparison helps when arranging hotel check-ins, rental car pickups, or family arrival times across western routes in Canada, Mexico, and the United States.

Frequently Asked Questions

What is the time difference between PST and MST?

Pacific Standard Time is 1 hour behind Mountain Standard Time. In offset terms, Pacific Standard Time is UTC-8 and Mountain Standard Time is UTC-7, so MST runs one hour ahead for the comparison on this page. A simple example is 9:00 PST = 10:00 MST.

Is MST always one hour ahead of PST?

For the standard-time comparison here, yes: MST is 1 hour ahead of PST. That means every example on this page follows the same pattern, such as 12:00 PST = 13:00 MST and 15:00 PST = 16:00 MST. This is useful for recurring meetings because the relationship is easy to remember when both sides are being discussed specifically as standard time.

How do I convert Pacific Standard Time to Mountain Standard Time?

Add one hour when converting from Pacific Standard Time to Mountain Standard Time in this comparison. For example, 9:00 PST becomes 10:00 MST, and 18:00 PST becomes 19:00 MST. This is helpful for scheduling regional calls, dispatch windows, and deadlines shared between Pacific and Mountain teams.

Does daylight saving time affect PST and MST?

Yes. Pacific Standard Time and Mountain Standard Time are both standard-time abbreviations, and their daylight saving counterparts are PDT and MDT respectively. That distinction matters because meeting invites, travel itineraries, and operating schedules should use the correct seasonal label rather than assuming PST or MST applies in every part of the year.

Is PST Pacific Standard Time or Pitcairn Standard Time?

On this page, PST means Pacific Standard Time (UTC-8). PST can also mean Pitcairn Standard Time (UTC-8), and that alternate meaning has its own page at /time-converter/pst-pitcairn-time-zone. If you are comparing western North American business hours with Mountain Standard Time, the intended meaning here is Pacific Standard Time.

What are common PST to MST meeting conversions?

Some of the most useful examples are 9:00 PST = 10:00 MST, 12:00 PST = 13:00 MST, 15:00 PST = 16:00 MST, and 18:00 PST = 19:00 MST. These cover common work scenarios such as morning standups, lunch-hour check-ins, afternoon project reviews, and evening coordination for operations teams. Because the gap is only one hour, these examples are easy to apply to recurring schedules.

Which countries use Pacific Standard Time and Mountain Standard Time?

Pacific Standard Time is used in Canada, Mexico, and the United States, and Mountain Standard Time is also used in Canada, Mexico, and the United States. That makes this comparison relevant for cross-border customer support, regional logistics, tourism planning, and teams that work across North American offices. Even with only a one-hour difference, accurate labeling helps avoid missed calls and timing mistakes.