Kolkata to London Time Comparison
Plan meetings and travel between Kolkata and London with live local times. All conversions use the IANA time-zone database and update automatically when either city changes for daylight saving time.
24-Hour Comparison Timeline
Green = working hours · Yellow = early/late · Red = night
24-hour reference table
| Kolkata (Kolkata) | London (London) |
|---|---|
| 12:00 AM | 07:30 PM(Fri, Jul 24) |
| 01:00 AM | 08:30 PM(Fri, Jul 24) |
| 02:00 AM | 09:30 PM(Fri, Jul 24) |
| 03:00 AM | 10:30 PM(Fri, Jul 24) |
| 04:00 AM | 11:30 PM(Fri, Jul 24) |
| 05:00 AM | 12:30 AM |
| 06:00 AM | 01:30 AM |
| 07:00 AM | 02:30 AM |
| 08:00 AM | 03:30 AM |
| 09:00 AM | 04:30 AM |
| 10:00 AM | 05:30 AM |
| 11:00 AM | 06:30 AM |
| 12:00 PM | 07:30 AM |
| 01:00 PM | 08:30 AM |
| 02:00 PM | 09:30 AM |
| 03:00 PM | 10:30 AM |
| 04:00 PM | 11:30 AM |
| 05:00 PM | 12:30 PM |
| 06:00 PM | 01:30 PM |
| 07:00 PM | 02:30 PM |
| 08:00 PM | 03:30 PM |
| 09:00 PM | 04:30 PM |
| 10:00 PM | 05:30 PM |
| 11:00 PM | 06:30 PM |
Daylight saving time
London observes daylight saving time; Kolkata does not. Expect a one-hour swing when London starts or ends DST.
Working-hours overlap
2 PM–5 PM Kolkata (9 AM–12 PM London) — the shared 9-to-5 window for meetings.
Frequently asked questions
What is the time difference between Kolkata and London?+
London (UTC+01:00) is currently 4 hours 30 minutes behind Kolkata (UTC+05:30). This page recalculates the offset live from the IANA time-zone database, including any daylight-saving transitions.
Does Kolkata or London observe daylight saving time?+
London observes daylight saving time; Kolkata does not, so the gap changes when London springs forward or falls back. Times on this page always reflect the current local rules.
What are the best meeting hours between Kolkata and London?+
Standard 9–5 working hours in Kolkata and London overlap from 2 PM to 5 PM Kolkata (9 AM–12 PM London). Schedule calls inside this window to keep both sides in normal business hours.
How do I quickly convert Kolkata to London?+
Use the live clocks and 24-hour reference table above. Pick any hour on the Kolkata row to see the matching London time. The Event Planner also lets you pick a specific date and share it with attendees.