Compare PST vs GMT
See the current time difference between PST and GMT, understand DST changes, and find practical meeting times across both zones.
PST GMT Time Difference
View the current offset between PST and GMT at a glance. PST is UTC-8 while GMT is UTC+0, so GMT is typically 8 hours ahead.
Track DST Offset Changes
Check how daylight saving time affects the comparison when Pacific Time switches to PDT. The page reflects seasonal changes automatically using IANA timezone database rules.
Best Meeting Time Finder
Use the visual hour-by-hour comparison grid to spot overlapping work hours, review scheduling tables, and export times with ICS, Google Calendar, or Gmail.
How to Find the Time Difference Between PST and GMT
Open the PST vs GMT converter: Go to https://www.xconvert.com/time-converter/pst-vs-gmt to load a comparison grid with PST and GMT already shown as separate rows. This view is useful when you are scheduling a client call between the U.S. West Coast and London-based teams, or when you need to line up support coverage across North America and the United Kingdom.
Add comparison cities if your schedule involves more regions: Click + Add City and search for cities that commonly work alongside PST and GMT, such as London, Los Angeles, and Dublin. This is especially helpful for software companies coordinating engineering in California with operations or finance teams in the UK and Ireland, or for media, gaming, and cloud infrastructure teams that span both regions.
Drag across the grid to compare working hours visually: Click Select to enter selection mode, then drag across the PST row to highlight a block such as 9:00 PST to 12:00 PST; the purple selection will show the corresponding 17:00 GMT to 20:00 GMT range on the GMT row. You can also test a late-afternoon handoff by dragging 15:00 PST to 18:00 PST, which maps to 23:00 GMT to 2:00 GMT (next day), making it clear that an end-of-day meeting in Pacific time pushes into late night in Greenwich Mean Time.
Adjust the range and export the result: Drag the center of the purple block to move the meeting window, or use the left and right handles to resize it until you find a slot that works for both sides. Once selected, use ICS download, Google Calendar, Gmail, Copy to clipboard, or Share link to send the final time window to remote teammates, clients, or travel coordinators so everyone receives the meeting in their own local context.
PST vs GMT Offset Explained
PST stands for Pacific Standard Time and uses UTC-8, while GMT stands for Greenwich Mean Time and uses UTC+0. GMT is 8 hours ahead of PST, so when it is 9:00 PST, it is 17:00 GMT, and when it is 12:00 PST, it is 20:00 GMT. This gap is large enough that a normal morning in Pacific time often lands in the late afternoon or evening in GMT.
The difference becomes even more important for business scheduling later in the day. A 15:00 PST meeting corresponds to 23:00 GMT, and 18:00 PST becomes 2:00 GMT the next day, which can push calls outside practical working hours for teams in the United Kingdom, Ireland, Iceland, Ghana, or other GMT locations. For distributed companies, this usually means the most workable overlap is earlier in the Pacific workday.
Both abbreviations here are standard-time labels, not year-round labels. PST has a daylight saving counterpart called PDT, and GMT has a daylight saving counterpart called IST, so the exact relationship can change seasonally when regions switch away from standard time. If you are arranging recurring meetings across quarters, product launches, customer support rotations, or cross-border trading workflows, it is important to confirm whether you are comparing standard time or a daylight-time period before sending invites.
PST is used in parts of Canada, Mexico, the Philippines, and the United States, while GMT is used in Burkina Faso, Gambia, Ghana, Guernsey, Guinea, Guinea-Bissau, Iceland, Ireland, Isle of Man, Ivory Coast, Jersey, Liberia, Mali, Mauritania, Saint Helena, Sao Tome and Principe, Senegal, Sierra Leone, Togo, and the United Kingdom. In practice, this means PST vs GMT comparisons are common for transatlantic software development, media distribution, customer success teams, airline planning, and logistics operations that connect North American Pacific schedules with UK and West African business hours.
Working Hours and Scheduling Impact
Because GMT is 8 hours ahead of PST, the most practical overlap usually happens during the Pacific morning. For example, 9:00 PST = 17:00 GMT, which can work for same-day project reviews, legal approvals, and agency calls before the GMT side ends its business day. By contrast, 12:00 PST = 20:00 GMT is already evening in GMT, so it is better suited to urgent escalations than routine team meetings.
This timing pattern matters for industries that operate across both regions. A SaaS company with product managers in California and account teams in London may prefer standups or client briefings before noon Pacific, while broadcasters, ad-tech firms, and cloud operations teams may use the late PST afternoon only for critical handoffs because 15:00 PST = 23:00 GMT. If a team waits until 18:00 PST, the GMT side is already at 2:00 the next day, which is generally unrealistic for standard office coordination.
When to Use PST vs GMT in Real-World Planning
PST vs GMT is a common comparison for companies that work between the U.S. and UK markets. Sales teams often need to know whether a West Coast morning call still reaches London or Dublin during office hours, and engineering teams use the comparison to plan release windows, incident response escalations, and end-of-day handoffs. The fixed examples make the pattern easy to remember: 9:00 PST = 17:00 GMT, 12:00 PST = 20:00 GMT, 15:00 PST = 23:00 GMT, and 18:00 PST = 2:00 GMT (next day).
Travel planning also benefits from understanding the gap. If you are flying from the U.S. West Coast to the United Kingdom or coordinating airport pickups, hotel check-ins, or event arrivals with people already on GMT, the 8-hour lead means messages sent late in the Pacific day may arrive after midnight in GMT locations. For conference organizers, recruiters, and international support teams, that often makes early Pacific scheduling the safest option for same-day responses.
Frequently Asked Questions
What is the time difference between PST and GMT?
GMT is 8 hours ahead of PST. That means a morning time in Pacific Standard Time becomes a late afternoon or evening time in Greenwich Mean Time, such as 9:00 PST = 17:00 GMT and 12:00 PST = 20:00 GMT. This is why PST-to-GMT scheduling usually works best earlier in the Pacific day.
Is GMT ahead of PST or behind it?
GMT is ahead of PST by 8 hours. In practical terms, if a team in California starts work at 9:00 PST, a team on GMT is already at 17:00 the same day. That lead makes GMT suitable for receiving updates from Pacific teams, but it also limits how late PST meetings can be scheduled before they become too late in GMT.
What is 9 AM PST in GMT?
9:00 PST = 17:00 GMT. This is one of the most useful conversion points for business users because it places a Pacific morning meeting into the late afternoon in GMT, which still fits many office schedules in the United Kingdom, Ireland, and other GMT locations. It is often a practical slot for sales calls, project reviews, and client check-ins.
What is noon PST in GMT?
12:00 PST = 20:00 GMT. By that point, the GMT side is already into the evening, so noon Pacific is usually better for urgent coordination than for routine daily meetings. Teams handling customer escalations or release approvals may still use it, but it is less comfortable for standard office collaboration.
What is 3 PM PST in GMT?
15:00 PST = 23:00 GMT. This conversion shows why late Pacific afternoon meetings are difficult for GMT participants, especially for recurring calls or workshops that require full attention. For remote teams, a 3 PM Pacific start often means the GMT side is joining near the end of their day or after normal working hours.
What is 6 PM PST in GMT?
18:00 PST = 2:00 GMT (next day). This means an early evening meeting in Pacific Standard Time lands in the middle of the night for GMT participants, making it unsuitable for most normal business communication. It may only work for emergency operations, overnight support, or follow-the-sun incident management.
Does PST always stay 8 hours behind GMT?
The standard-time comparison here is 8 hours, because PST is UTC-8 and GMT is UTC+0. However, PST has a daylight saving counterpart called PDT, and GMT has a daylight saving counterpart called IST, so the relationship can shift when one or both regions are observing daylight time instead of standard time. That is especially important when setting recurring meetings across seasons.
Which countries use PST and which countries use GMT?
PST is used in Canada, Mexico, the Philippines, and the United States. GMT is used in Burkina Faso, Gambia, Ghana, Guernsey, Guinea, Guinea-Bissau, Iceland, Ireland, Isle of Man, Ivory Coast, Jersey, Liberia, Mali, Mauritania, Saint Helena, Sao Tome and Principe, Senegal, Sierra Leone, Togo, and the United Kingdom. This broad geographic spread makes PST vs GMT relevant not only for U.S.-UK coordination, but also for communication with West Africa, Atlantic territories, and international service teams.