Pacific Time (PT) to London (GMT/BST) Time Converter
What this converter helps you do
PST to GMT is the West Coast version of the transatlantic scheduling problem. The gap between California and London is eight hours during standard time and seven during the DST overlap period, but because the US and UK switch clocks on different dates, there are transition weeks where the offset is temporarily different.
This pair is essential for Silicon Valley companies with London offices, game studios coordinating across the Pacific and Atlantic, media teams aligning US West Coast and UK publication schedules, and anyone on the West Coast working with British clients or partners.
How it works
The converter uses IANA rules for America/Los_Angeles (PST/PDT) and Europe/London (GMT/BST). It handles the fact that the US and UK enter and exit DST on different weekends.
The scheduling squeeze: with eight hours separating the West Coast and London, the shared business-hours window is extremely tight. A 9 AM start in California is already 5 PM in London, so most cross-team meetings need to happen in the narrow band of California morning and London afternoon.
Limitation: the tool gives correct clock times but cannot assess whether the resulting time is practical. With this gap, one side is almost always at the edge of their working day.
Practical use scenarios
- Schedule a sync between a San Francisco startup and a London-based investor or partner.
- Coordinate a game release or patch deployment across US West Coast and UK teams.
- Plan media embargo lifts that need to hit both Pacific and UK audiences at specific local times.
- Find the London equivalent of a late-afternoon PST deadline for a UK-based contractor.
- Check whether a California morning meeting falls within London business hours.
Pair-specific planning notes
- The shared availability window is very narrow: roughly 8-10 AM PT / 4-6 PM GMT. Meetings outside this range push London past close of business or California into very early morning.
- During the DST transition gap in March, the offset temporarily drops from eight to seven hours for two to three weeks. Recurring meetings can shift unexpectedly during this period.
- For teams with regular cross-Atlantic needs, alternating meeting times between California-friendly and London-friendly slots helps distribute the burden.
Related tools
FAQ
Eight hours during standard time (PST/GMT) and seven hours when both sides are in daylight saving. During the transition weeks, the offset can temporarily differ.
The only practical slot is 8-10 AM Pacific, which is 4-6 PM London time. Outside this window, one side is outside business hours.
The US and UK switch to daylight saving on different weekends. During the gap, the offset changes temporarily, shifting your meeting by one hour on one side.
This converter handles both. GMT applies in UK winter and BST in UK summer. The tool uses the correct offset automatically based on the date you select.
Page last built: 2026-04-13.