Back to map

Time Difference: Kolkata to London

🇮🇳KolkataUTC+5:30
vs
🇬🇧LondonUTC+0
🇮🇳
Kolkata, India
Wed, Jun 3
🇬🇧
London, UK
Wed, Jun 3

Click a time to convert

Time Difference
4 hours 30 minutes
London is 4 hours 30 minutes behind Kolkata
Compare on map
🇮🇳
Kolkata
View city page
🇬🇧
London
View city page

Kolkata vs London timezone guide

Kolkata (India) uses the Asia/Kolkata timezone at UTC+5:30, while London (UK) uses Europe/London at UTC+0. This means London is 5 hours 30 minutes behind Kolkata (based on standard offsets — the live difference above accounts for daylight saving time).

Best meeting times between Kolkata and London

Standard 9-to-5 working hours overlap by 3.5 hours per day. The shared window is 1:30pm–5pm in Kolkata, which is 9am–12:30pm in London. Schedule recurring meetings inside that window and both teams stay inside standard working hours.

Hour-by-hour planner

KolkataLondonStatus
6am1:30amKolkata early, London asleep
7am2:30amKolkata early, London asleep
8am3:30amKolkata early, London asleep
9am4:30amKolkata working hours, London asleep
10am5:30amKolkata working hours, London asleep
11am6:30amOne side outside 9-to-5 but still awake
12pm7:30amOne side outside 9-to-5 but still awake
1pm8:30amOne side outside 9-to-5 but still awake
2pm9:30amBoth at work — ideal meeting time
3pm10:30amBoth at work — ideal meeting time
4pm11:30amBoth at work — ideal meeting time
5pm12:30pmOne side outside 9-to-5 but still awake
6pm1:30pmOne side outside 9-to-5 but still awake
7pm2:30pmOne side outside 9-to-5 but still awake
8pm3:30pmOne side outside 9-to-5 but still awake
9pm4:30pmOne side outside 9-to-5 but still awake
10pm5:30pmKolkata late evening, London evening

Green = standard working hours (9 AM – 5 PM). Amber = early (6–9 AM). Orange = evening (5–10 PM). Grey = asleep or late.

Daylight saving time between Kolkata and London

London observes daylight saving time, but Kolkata does not. That means the difference between the two cities changes seasonally — by one hour, around London's transition dates.

  • Jan 1 → Mar 29Kolkata is 5h 30m ahead London
  • Mar 29 → Oct 25Kolkata is 4h 30m ahead London
  • Oct 25 → Jan 1Kolkata is 5h 30m ahead London

Distance between Kolkata and London

Great-circle distance
7,962 km
Direct flight time
~10h 22m

Kolkata and London are 7,962 km apart along the great-circle route. A direct flight takes roughly ~10h 22m, depending on aircraft type, winds, and routing.

More comparisons

Kolkata to New YorkKolkata to TokyoKolkata to SydneyLondon to New YorkLondon to TokyoLondon to SydneyLondon to Dubai

Frequently asked questions

What is the time difference between Kolkata and London?
The current time difference is 4 hours 30 minutes. Kolkata is currently 4 hours 30 minutes ahead of London.
Is Kolkata ahead of London?
Yes. Kolkata is currently 4 hours 30 minutes ahead of London.
What time is it in London when it's 9 AM in Kolkata?
When it's 9 AM in Kolkata, it's 4:30am in London.
When is the best time to schedule a meeting between Kolkata and London?
The best window is 1:30pm–5pm in Kolkata, which is 9am–12:30pm in London. That's 3.5 hours where both teams are inside standard 9-to-5 working hours.
Do Kolkata and London observe daylight saving time?
London observes daylight saving time, but Kolkata does not — the difference between the two cities changes by one hour around the DST transition dates.
How far apart are Kolkata and London?
Kolkata and London are 7,962 km apart along the great-circle route. A direct flight takes roughly 10 hours 22 minutes.