Compare PST vs BST
See the current time difference between PST and BST, check DST changes, and find practical meeting times across both zones.
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-bst to load a visual comparison grid with PST and BST already shown as separate rows across a 24-hour timeline. This page is useful when you are scheduling a sales call between California and London, planning support coverage between North American and UK teams, or checking whether a flight departure or webinar time lands inside normal office hours on both sides.
Add comparison cities relevant to your schedule: Click + Add City and search for cities such as Los Angeles, London, and New York if you need to compare West Coast operations, UK headquarters, and East Coast clients in one view. This is especially practical for software companies, media teams, and financial services firms that work across Pacific, British, and Eastern business hours and need to see where overlap exists before sending invites.
Drag to select the meeting window on the grid: Click Select to enter selection mode, then drag across the PST row to highlight a time range in purple; for example, drag from 8:00 AM to 10:00 AM PST to see that it corresponds to 4:00 PM to 6:00 PM BST on the same day. That visual check quickly confirms that a morning meeting in California is usually a late-afternoon meeting in the UK, which is often workable for product demos, agency reviews, and cross-Atlantic handoffs.
Adjust and export the chosen time range: Drag the center of the purple block to move the whole slot, or use the left and right handles to resize it until you find the best overlap, then use the export options for ICS download, Google Calendar, Gmail, Copy to clipboard, or Share link. For a real-world workflow, a distributed team can send the ICS file to London and Pacific-based staff so each person sees the event in local time automatically, while a share link is useful for confirming interview slots or client workshops without back-and-forth emails.
PST vs BST Offset Explained
PST usually refers to Pacific Standard Time (UTC-8), used in parts of the west coast of North America during standard time, while BST usually refers to British Summer Time (UTC+1), the daylight-saving time observed in the United Kingdom. When those two labels are used literally, BST is 9 hours ahead of PST, so 9:00 AM PST = 6:00 PM BST, and 5:00 PM PST = 2:00 AM BST the next day.
The seasonal complication is that the UK does not use BST all year, and the US Pacific zone does not stay on PST all year either. In the UK, clocks switch to BST on the last Sunday in March and return to GMT (UTC+0) on the last Sunday in October; in the US Pacific time zone, clocks switch from PST to PDT (UTC-7) on the second Sunday in March and return on the first Sunday in November. That means the real UK–US West Coast difference is not always represented by “PST vs BST” in a calendar sense, because for part of the year the comparison may actually be PDT vs BST = 8 hours or PST vs GMT = 8 hours.
This matters most during the transition weeks in March and late October to early November, when many missed meetings happen. For example, after the US moves to daylight time in March but before the UK starts BST, Los Angeles is 7 hours behind the UK instead of the more familiar 8-hour summer gap or 9-hour literal PST-to-BST label gap; similarly, after the UK returns to GMT in autumn but before the US leaves daylight time, the difference can temporarily shift again. If you are coordinating legal calls, ad campaign launches, engineering standups, or live customer support windows, checking the exact date on the converter is more reliable than assuming a fixed offset.
In practical scheduling terms, the best overlap for same-day work is usually 8:00 AM to 10:00 AM Pacific and 4:00 PM to 6:00 PM in the UK when the gap is 8 hours, or 5:00 PM to 7:00 PM BST when comparing true PST to BST at a 9-hour difference. That is why many SaaS companies, game studios, film production teams, and international agencies place transatlantic sync meetings in the Pacific morning: it catches the end of the UK workday without forcing California staff into very early starts.
Frequently Asked Questions
What is the exact time difference between PST and BST?
The exact difference between PST (UTC-8) and BST (UTC+1) is 9 hours, with BST ahead of PST. In simple terms, when it is 12:00 PM noon in PST, it is 9:00 PM in BST the same day, which makes late Pacific mornings and early Pacific afternoons poor choices for UK business meetings.
Is BST always 9 hours ahead of PST?
Only if you are using the terms literally as fixed seasonal labels: PST = UTC-8 and BST = UTC+1, which creates a 9-hour gap. In real scheduling, the UK is not on BST all year and the US Pacific region is not on PST all year, so the working difference between London and cities like Los Angeles can be 7, 8, or 9 hours depending on the date and whether one side has already changed clocks.
Why do meeting times between California and the UK change in March and October?
The US and UK change clocks on different dates, which creates temporary offset shifts. The US Pacific zone begins daylight saving on the second Sunday in March, while the UK begins BST on the last Sunday in March; the UK returns to GMT on the last Sunday in October, while the US returns to standard time on the first Sunday in November, so there are short periods each year when the usual expected difference is off by one hour.
If it is 9 AM PST, what time is it in BST?
If you mean true PST to BST, then 9:00 AM PST = 6:00 PM BST on the same calendar day. That timing can work for contract reviews, publishing approvals, and final support escalations, but it is already near the end of the UK office day, so longer workshops are often better moved earlier in Pacific time.
What are the best business hours overlap between PST and BST?
The most practical overlap depends on whether you are comparing strict PST to BST or the real current Pacific and UK local times on a specific date. As a rule, 7:00 AM to 9:00 AM Pacific often maps to 3:00 PM to 5:00 PM UK time during much of the year, and 8:00 AM to 10:00 AM PST maps to 5:00 PM to 7:00 PM BST in a strict 9-hour comparison, which is acceptable for short status meetings but less ideal for long collaborative sessions.
Is London in BST all year?
No, London uses British Summer Time only from the last Sunday in March until the last Sunday in October. Outside that period, London uses Greenwich Mean Time (GMT, UTC+0), so if you schedule recurring meetings with UK colleagues, you should verify the date rather than assuming the UK is always one hour ahead of UTC.
How can I avoid scheduling mistakes between PST and BST?
Use a date-specific converter instead of relying on memory, especially around DST transition weeks. On the xconvert grid, selecting the exact day at the top and dragging the meeting window visually lets you confirm whether your chosen slot falls in UK work hours, lands after midnight, or shifts by an hour because one region has already changed clocks.