This GMT to PST converter turns any time in Greenwich Mean Time (GMT) into Pacific Standard Time (PST), using your device clock so daylight saving is applied automatically. PST is 8 hours behind GMT. GMT is UTC+0 (BST: UTC+1); PST is UTC−8 (PDT: UTC−7).
GMT covers London, Edinburgh, Dublin (IST); PST covers Los Angeles, San Francisco, Seattle. Because both zones change their clocks on different dates, the difference is not constant through the year. The tables below show both cases, and the converter at the top always uses the rule in force on the date you pick.
GMT and PST UTC offsets
GMT
UTC+0
Greenwich Mean Time
BST UTC+1 from March 29 to October 25, 2026
PST
UTC−8
Pacific Standard Time
PDT UTC−7 from March 8 to November 1, 2026
GMT to PST conversion table
| GMT | PST |
|---|---|
| 12 am | 4 pmprevious day |
| 3 am | 7 pmprevious day |
| 6 am | 10 pmprevious day |
| 8 am | 12 am |
| 9 am | 1 am |
| 10 am | 2 am |
| 11 am | 3 am |
| 12 pm | 4 am |
| 1 pm | 5 am |
| 2 pm | 6 am |
| 3 pm | 7 am |
| 4 pm | 8 am |
| 5 pm | 9 am |
| 6 pm | 10 am |
| 8 pm | 12 pm |
| 10 pm | 2 pm |
Frequently asked questions
What is the time difference between GMT and PST?
PST is 8 hours behind GMT. That comes from the UTC offsets: GMT is UTC+0 and PST is UTC−8. For example, 9 am GMT = 1 am PST.
Is PST ahead of or behind GMT?
PST is 8 hours behind GMT, so when it is noon in GMT it is 4 am in PST. Ahead means the clock there already shows a later time; a call at 5 pm GMT lands at 9 am PST.
Does GMT or PST observe daylight saving time in 2026?
GMT switches to BST (UTC+1) on March 29 and back on October 25 in 2026. PST switches to PDT (UTC−7) on March 8 and back on November 1. Between those dates the difference in the table above shifts by an hour, which is the usual cause of missed calls in spring and autumn.
What is the best time for a meeting between GMT and PST?
Office hours (9 am to 5 pm) do not overlap at all with a 8 hours difference. The least painful options are early morning in PST or early evening in GMT; for example 8 am GMT = 12 am PST and 6 pm GMT = 10 am PST. Rotate the inconvenient slot between the two sides for recurring calls.
Which cities use GMT and PST?
GMT (Greenwich Mean Time) is used in London, Edinburgh, Dublin (IST). PST (Pacific Standard Time) is used in Los Angeles, San Francisco, Seattle, Vancouver. Some cities inside a zone skip daylight saving, noted in parentheses, so their offset matches only part of the year.