London to Seattle Time Converter
Set a time in London and read it off in Seattle. Drag the slider to move through the day, or add more cities to the board.
Right now it is 7:42 AM in London and 11:42 PM in Seattle. Seattle is 8 hours behind London.
Every hour, side by side
London on the left, Seattle on the right, for a normal working day.
| London | Seattle | Overlap |
|---|---|---|
| 6 am | 10:00 PM previous day | Both asleep |
| 7 am | 11:00 PM previous day | Seattle asleep |
| 8 am | 12:00 AM | Seattle asleep |
| 9 am | 1:00 AM | Seattle asleep |
| 10 am | 2:00 AM | Seattle asleep |
| 11 am | 3:00 AM | Seattle asleep |
| 12 pm | 4:00 AM | Seattle asleep |
| 1 pm | 5:00 AM | Seattle asleep |
| 2 pm | 6:00 AM | Seattle asleep |
| 3 pm | 7:00 AM | Outside 9–5 |
| 4 pm | 8:00 AM | Workable for both |
| 5 pm | 9:00 AM | Workable for both |
| 6 pm | 10:00 AM | Outside 9–5 |
| 7 pm | 11:00 AM | Outside 9–5 |
| 8 pm | 12:00 PM | Outside 9–5 |
| 9 pm | 1:00 PM | Outside 9–5 |
| 10 pm | 2:00 PM | London asleep |
Who is awake when
Each column is one hour of the selected day in London. Click a column to move the whole board to that hour.
Planning a call between London and Seattle
Best window: 4 pm to 6 pm in London (8:00 AM to 10:00 AM in Seattle). There is no overlap inside a strict 9-to-5, but these hours fall within a normal 8-to-6 working day at both ends — one side takes it near the start of the day, the other near the end.
Daylight saving
London is on UTC+1 (BST). Clocks go back one hour on Sunday, October 25, 2026, moving it to UTC+0. Between that date and the other city’s own change, the gap between them is an hour different from usual.
Seattle is on UTC−7 (PDT). Clocks go back one hour on Sunday, November 1, 2026, moving it to UTC−8. Between that date and the other city’s own change, the gap between them is an hour different from usual.