Chicago to London Time Converter
Set a time in Chicago and read it off in London. Drag the slider to move through the day, or add more cities to the board.
Right now it is 1:42 AM in Chicago and 7:42 AM in London. London is 6 hours ahead of Chicago.
Every hour, side by side
Chicago on the left, London on the right, for a normal working day.
| Chicago | London | Overlap |
|---|---|---|
| 6 am | 12:00 PM | Chicago asleep |
| 7 am | 1:00 PM | Outside 9–5 |
| 8 am | 2:00 PM | Workable for both |
| 9 am | 3:00 PM | Both at work |
| 10 am | 4:00 PM | Both at work |
| 11 am | 5:00 PM | Workable for both |
| 12 pm | 6:00 PM | Outside 9–5 |
| 1 pm | 7:00 PM | Outside 9–5 |
| 2 pm | 8:00 PM | Outside 9–5 |
| 3 pm | 9:00 PM | Outside 9–5 |
| 4 pm | 10:00 PM | London asleep |
| 5 pm | 11:00 PM | London asleep |
| 6 pm | 12:00 AM next day | London asleep |
| 7 pm | 1:00 AM next day | London asleep |
| 8 pm | 2:00 AM next day | London asleep |
| 9 pm | 3:00 AM next day | London asleep |
| 10 pm | 4:00 AM next day | Both asleep |
Who is awake when
Each column is one hour of the selected day in Chicago. Click a column to move the whole board to that hour.
Planning a call between Chicago and London
Best window: 9 am to 11 am in Chicago (3:00 PM to 5:00 PM in London). In that stretch both cities sit inside core 9-to-5 hours, so neither side takes the call early or late.
Daylight saving
Chicago is on UTC−5 (CDT). Clocks go back one hour on Sunday, November 1, 2026, moving it to UTC−6. Between that date and the other city’s own change, the gap between them is an hour different from usual.
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.