PST vs BST Time Difference
See how Pacific Standard Time compares with British Summer Time, including current offset changes, DST impact, and overlap hours.
PST and BST Difference
View the current time difference between Pacific Standard Time and British Summer Time with hour-by-hour comparison. See when BST is ahead and how the gap changes across the year.
DST Changes and Effects
Track how daylight saving time affects Pacific Standard Time and British Summer Time during spring and autumn transitions. The page updates automatically using the IANA timezone database.
Best Meeting Time Finder
Find the best overlap hours for meetings between Pacific Standard Time and British Summer Time using the visual time grid. Export selected times to ICS, Google Calendar, or Gmail.
PST (Pacific Standard Time, UTC-8) is 9 hours behind BST (British Summer Time, UTC+1), so 9:00 PST equals 18:00 BST.
Looking for Pitcairn Standard Time? See /time-converter/pst-pitcairn-time-zone.
Looking for Bangladesh Standard Time? See /time-converter/bst-bangladesh-time-zone.
Looking for Bougainville Standard Time? See /time-converter/bst-bougainville-time-zone.
How to Find the Time Difference Between PST and BST
Open the PST vs BST converter: Go to
https://www.xconvert.com/time-converter/pst-vs-bstto see Pacific Standard Time and British Summer Time lined up in the visual comparison grid. This view is useful when you are scheduling a call between the west coast of North America and the United Kingdom, such as a software handoff between a California product team and a London client services team.Add comparison cities: Click + Add City and search for cities that matter to your workflow, such as Los Angeles or Vancouver for Pacific Standard Time and London for British Summer Time. This is especially practical for media, SaaS, e-commerce, and legal teams that regularly coordinate work across the United States, Canada, and the United Kingdom.
Select a meeting window on the grid: Click Select if needed, then drag across the Pacific Standard Time row to highlight a time range in purple, such as 9:00 to 12:00 PST. The grid immediately shows the British Summer Time equivalent as 18:00 to 21:00 BST, helping you confirm that a late-morning west coast meeting lands in the early evening in the UK.
Adjust and export the result: Drag the center of the purple block to move the whole range, or drag the left and right handles to resize it until you find a workable overlap. Once selected, use ICS download, Google Calendar, Gmail, Copy to clipboard, or Share link to send the final slot to colleagues, which is useful when booking customer demos, agency reviews, or cross-border operations calls.
PST vs BST Offset Explained
Pacific Standard Time is UTC-8, while British Summer Time is UTC+1. British Summer Time is 9 hours ahead of Pacific Standard Time, which means when it is 9:00 in Pacific Standard Time, it is 18:00 in British Summer Time, and when it is 12:00 PST, it is 21:00 BST.
This gap becomes more restrictive later in the Pacific Standard Time workday. For example, 15:00 PST converts to 0:00 BST on the next day, and 18:00 PST converts to 3:00 BST on the next day, so afternoon meetings on the west coast often push into midnight or overnight hours in the UK.
The abbreviations also reflect different seasonal roles. Pacific Standard Time is a standard-time abbreviation, and its daylight-saving counterpart is PDT, while British Summer Time is itself a daylight-saving abbreviation, and its standard-time counterpart is GMT. That matters for recurring meetings because a team may refer to “PST” year-round in casual speech, but Pacific Standard Time specifically means UTC-8, whereas British Summer Time specifically means UTC+1.
Pacific Standard Time is used in Canada, Mexico, and the United States, while British Summer Time is used in Guernsey, the Isle of Man, Jersey, and the United Kingdom. In practical business terms, this pairing appears often in technology, entertainment, consulting, finance, and international retail, where west coast teams need to catch UK counterparts before the British Summer Time business day ends.
Working Hours Overlap Between Pacific Standard Time and British Summer Time
Pacific Standard Time and British Summer Time have a narrow same-day overlap for standard office hours. Because British Summer Time is 9 hours ahead, a 9:00 to 17:00 workday in Pacific Standard Time maps to 18:00 to 2:00 in British Summer Time, which means only the earliest Pacific Standard Time hours line up with the UK evening on the same calendar day.
This timing pattern affects how teams structure communication. A 9:00 PST meeting works as an 18:00 BST meeting, which can still suit urgent client reviews, release approvals, or end-of-day check-ins in the UK, but 12:00 PST already becomes 21:00 BST, making midday west coast meetings much less practical for regular collaboration.
For remote teams, the most workable pattern is usually to place live conversations at the start of the Pacific Standard Time business day and toward the end of the British Summer Time business day. That setup is common for engineering standups with UK stakeholders, ad campaign approvals between California and London agencies, and support escalations where both sides need to be available at once.
Where PST and BST Are Used
Pacific Standard Time is associated with parts of North America in Canada, Mexico, and the United States. British Summer Time is used in Guernsey, the Isle of Man, Jersey, and the United Kingdom, so this comparison is especially relevant for transatlantic coordination involving UK-based headquarters, agencies, vendors, and customers.
The 9-hour difference shapes common travel and communications planning. If a traveler leaves a Pacific Standard Time-based itinerary and needs to confirm hotel check-in, airport transfer, or a business dinner in the United Kingdom, even a short delay in the Pacific morning can already be evening under British Summer Time.
Commercial teams also use this conversion to align deadlines. A west coast company sending contracts, campaign assets, or pricing approvals at 9:00 PST is reaching UK recipients at 18:00 BST, which may still be acceptable for end-of-day processing, while sending the same items at 15:00 PST reaches them at 0:00 BST the next day.
Frequently Asked Questions
What is the time difference between PST and BST?
Pacific Standard Time is 9 hours behind British Summer Time. In the other direction, British Summer Time is 9 hours ahead of Pacific Standard Time, so 9:00 PST equals 18:00 BST and 12:00 PST equals 21:00 BST.
Is BST always 9 hours ahead of PST?
Yes, in this comparison British Summer Time is 9 hours ahead of Pacific Standard Time. That means every example on this page follows the same relationship, including 15:00 PST = 0:00 BST on the next day and 18:00 PST = 3:00 BST on the next day.
What time in BST is 9 AM PST?
9:00 in Pacific Standard Time is 18:00 in British Summer Time. This is one of the most practical conversion points for business because it places a west coast morning meeting into the UK early evening, which can still work for sales calls, stakeholder reviews, and urgent approvals.
What time in BST is noon PST?
12:00 in Pacific Standard Time equals 21:00 in British Summer Time. For remote teams, that means a lunch-hour meeting on the west coast becomes a late evening meeting in the UK, so it is usually better suited to one-off discussions than recurring team meetings.
Why does PST use a different seasonal label than BST?
Pacific Standard Time is a standard-time abbreviation, and its daylight-saving counterpart is PDT. British Summer Time is the daylight-saving abbreviation, and its standard counterpart is GMT, so the names themselves already indicate that these two labels belong to different seasonal parts of the clock cycle.
Is PST Pacific Standard Time or Pitcairn Standard Time?
On this page, PST means Pacific Standard Time, which is UTC-8. PST can also mean Pitcairn Standard Time, also UTC-8, and if you need that version, use /time-converter/pst-pitcairn-time-zone.
Is BST British Summer Time or Bangladesh Standard Time?
On this page, BST means British Summer Time, which is UTC+1. BST can also mean Bangladesh Standard Time, which is UTC+6, or Bougainville Standard Time, which is UTC+11; for those, use /time-converter/bst-bangladesh-time-zone or /time-converter/bst-bougainville-time-zone.
When does a PST afternoon become the next day in BST?
A Pacific Standard Time afternoon can already fall on the next calendar day in British Summer Time. For example, 15:00 PST converts to 0:00 BST on the next day, and 18:00 PST converts to 3:00 BST on the next day, which is important when setting filing deadlines, deployment windows, or overnight support coverage.
Which countries use PST and BST?
Pacific Standard Time is used in Canada, Mexico, and the United States. British Summer Time is used in Guernsey, the Isle of Man, Jersey, and the United Kingdom, which makes this comparison especially relevant for North America–UK business, travel, and customer communication.