PT to GMT Time Converter
GMT is 8 hours ahead of PT. The US West Coast is currently on PDT (UTC-7:00), and The UK and Ireland are currently on BST (UTC+1:00).
Best Time to Call Between PT and GMT
Standard 9-to-5 hours in these two zones never overlap, so someone has to take the call outside their working day. The most workable window is 7:00 AM to 2:00 PM PT, which is 3:00 PM to 10:00 PM GMT.
both at work PT only GMT only neither — hours along the strip are PT.
Common Times Converted
PT on the left, GMT on the right.
PT to GMT: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| PT | GMT | Working hours |
|---|---|---|
| 12:00 AM | 8:00 AM | — |
| 1:00 AM | 9:00 AM | GMT only |
| 2:00 AM | 10:00 AM | GMT only |
| 3:00 AM | 11:00 AM | GMT only |
| 4:00 AM | 12:00 PM | GMT only |
| 5:00 AM | 1:00 PM | GMT only |
| 6:00 AM | 2:00 PM | GMT only |
| 7:00 AM | 3:00 PM | GMT only |
| 8:00 AM | 4:00 PM | GMT only |
| 9:00 AM | 5:00 PM | PT only |
| 10:00 AM | 6:00 PM | PT only |
| 11:00 AM | 7:00 PM | PT only |
| 12:00 PM | 8:00 PM | PT only |
| 1:00 PM | 9:00 PM | PT only |
| 2:00 PM | 10:00 PM | PT only |
| 3:00 PM | 11:00 PM | PT only |
| 4:00 PM | 12:00 AM next day | PT only |
| 5:00 PM | 1:00 AM next day | — |
| 6:00 PM | 2:00 AM next day | — |
| 7:00 PM | 3:00 AM next day | — |
| 8:00 PM | 4:00 AM next day | — |
| 9:00 PM | 5:00 AM next day | — |
| 10:00 PM | 6:00 AM next day | — |
| 11:00 PM | 7:00 AM next day | — |
What PT and GMT Actually Are
PT — Pacific Time
Los Angeles, San Francisco, Seattle, Las Vegas, Vancouver. Standing at UTC-8:00 as written, and the region does change its clocks, so its live offset moves by an hour twice a year. The next change is on Sunday, November 1, 2026, to PST.
Pacific Time anchors the US technology industry, so a great deal of software and scheduling convention is written implicitly around it.
GMT — Greenwich Mean Time
The UK and Ireland in winter, plus Iceland, Portugal and much of West Africa. Standing at UTC as written, and the region does change its clocks, so its live offset moves by an hour twice a year. The next change is on Sunday, October 25, 2026, to GMT. Often used loosely as a synonym for UTC. They differ by less than a second, so for scheduling they are interchangeable.
Britain ran an experiment from 1968 to 1971 on permanent UTC+1, abandoning GMT entirely. It was scrapped after complaints about dark winter mornings in Scotland.
What This Means in Practice
The date changes mid-working-day
For 1 of the eight hours in a normal PT working day, the equivalent GMT time falls on a different calendar date. Anything scheduled in that stretch needs the date checked as well as the time, or a Tuesday call quietly becomes a Wednesday one at the other end.
Both sides change clocks, on different dates
Both regions observe daylight saving but do not switch on the same day, so for a week or two each spring and fall the gap between them is an hour different from the rest of the year. Those short windows are where recurring invitations quietly break.
Major Cities in Each Zone
Cities on PT
Cities on GMT
Frequently Asked Questions
What is the time difference between PT and GMT?
GMT is 8 hours ahead of PT.
What is 9:00 AM PT in GMT?
9:00 AM PT is 5:00 PM GMT.
What are the best hours to schedule a call between PT and GMT?
Standard business hours in these two zones do not overlap at all, so one side has to work outside the 9-to-5. The most workable window is 7:00 AM to 2:00 PM PT, which is 3:00 PM to 10:00 PM GMT.
Does the difference between PT and GMT change during the year?
Yes. Both regions observe daylight saving, and they do not switch on the same dates, so the gap shifts by an hour at least twice a year. The next clock change is on Sunday, November 1, 2026.
Does GMT always mean Greenwich Mean Time?
Often used loosely as a synonym for UTC. They differ by less than a second, so for scheduling they are interchangeable.