London time to Chicago time
Chicago is 6 hours behind London all year (London BST/UTC+01:00 in summer; Chicago GMT-5/UTC−05:00). Enter a London time below to convert it, or leave it blank to see the current time in both cities.
How to use the London to Chicago time
- Type a London time (24-hour) and optionally a date, or leave blank for now.
- Click Convert.
- Read the Chicago time and the working-hours table.
Time difference between London and Chicago
Chicago is 6 hours behind London all year. Both London and Chicago observe daylight saving time, but they change clocks on different dates, so for a few weeks each spring and autumn the difference shifts by an hour. London uses Europe/London time (UTC+00:00 in January, UTC+01:00 in July); Chicago uses America/Chicago (UTC−06:00 in January, UTC−05:00 in July).
Working week in London and Chicago
London: Office hours 09:00–17:30, weekend Saturday–Sunday. Clocks go forward on the last Sunday of March (BST, UTC+1) and back on the last Sunday of October (GMT).
Chicago: Central Time, one hour behind New York: CDT (UTC−5) in summer, CST (UTC−6) in winter. Weekend Saturday–Sunday.
Quick conversion table (summer difference)
| London | Chicago |
|---|---|
| 08:00 | 02:00 |
| 09:00 | 03:00 |
| 10:00 | 04:00 |
| 12:00 | 06:00 |
| 14:00 | 08:00 |
| 16:00 | 10:00 |
| 18:00 | 12:00 |
| 20:00 | 14:00 |
| 22:00 | 16:00 |
Table uses the July difference; the tool above applies the exact rule for any date.
Best time to call between London and Chicago
Within normal office hours (09:00–18:00) in both cities: 15:00–17:00 London time. For a compromise outside that window, the fairest slots are the ones nearest each side's start or end of day, alternating who takes the inconvenient hour.
Reverse
Need the other direction? See Chicago to London, or the general time zone converter.
Frequently asked questions
How many hours ahead is Chicago from London?
Chicago is 6 hours behind London all year.
When it is 12:00 noon in London, what time is it in Chicago?
06:00 in summer (the same or previous day); use the tool for a specific date.
Does the converter handle daylight saving?
Yes, for the exact date you enter, using the IANA time-zone rules in your browser.
Privacy
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Last updated 2026-09-23.