Time Zone Converter
Chicago to London Time
Compare Chicago and London live. Drag the slider to find a time that works for both.
America/Chicago
08:49
CDT · Mon
Europe/London
14:49
GMT+1 · Mon
Chicago to London time difference
London sits 6 hours ahead of Chicago for most of the year, widening or narrowing by an hour during the short spells when the UK and US have not yet both changed their clocks. Chicago mornings overlap comfortably with the London afternoon.
Working hours: when Chicago and London overlap
Taking a standard 09:00–17:00 working day in both places, the two cities currently share 09:00-11:00 in Chicago , which is 15:00-17:00 in London . Anything scheduled inside that window lands in office hours at both ends.
The narrower the window, the more it pays to book the very start or end of it. Drag the timeline above to see the effect of moving a meeting by half an hour.
Quick conversion: Chicago to London
| Chicago | London |
|---|---|
| 06:00 | 12:00 |
| 09:00 | 15:00 |
| 12:00 | 18:00 |
| 15:00 | 21:00 |
| 18:00 | 00:00 next day |
| 21:00 | 03:00 next day |
Based on the 6 hours ahead of offset in effect on 3 August 2026. The comparator above is always live.
Daylight saving between Chicago and London
Both cities change their clocks, but not on the same dates, so the gap between them briefly differs from its usual value each time one moves before the other.
- 25 October 2026 — London puts its clocks back an hour. London is then 5 hours ahead of Chicago.
- 1 November 2026 — Chicago puts its clocks back an hour. London is then 6 hours ahead of Chicago.
- 14 March 2027 — Chicago puts its clocks forward an hour. London is then 5 hours ahead of Chicago.
- 28 March 2027 — London puts its clocks forward an hour. London is then 6 hours ahead of Chicago.
These dates come from the same time zone database your browser uses, so the converter above applies each change automatically on the day it happens.
Frequently Asked Questions: Chicago & London
Can I compare Chicago and London time directly?
Yes - this page loads Chicago and London by default so you can see the current gap between them immediately. You can still change either city using the boxes above if you want a different comparison.
What do the common time zone abbreviations GMT, EST, and PST stand for?
These abbreviations identify a region's standard offset from UTC. GMT (Greenwich Mean Time) is the reference time for the UK, EST (Eastern Standard Time) covers the US East Coast such as New York and Washington, and PST (Pacific Standard Time) covers the US West Coast such as Los Angeles.
Does this time zone calculator automatically account for Daylight Saving Time (DST)?
Yes. TimeMatch.me reads the time zone database built into your own browser, which already knows whether any given city is currently observing daylight saving or standard time, and adjusts the calculation automatically all year round.
Does the site save my location or time data on a server?
No. TimeMatch.me runs entirely on the client side - every calculation happens on your phone or computer. Nothing about your location, your searches, or the cities you compare is sent to or stored on our servers.
Can I compare two specific time zones directly?
Yes. Besides the main comparator, dedicated pages such as the GMT to EST converter pre-load two common zones for a quick check, and you can always type any two cities into the boxes on any page.