Time Difference Between London and Kolkata

The time difference between London and Kolkata is 5 hours and 30 minutes. When it is 12:00 noon in London, it is 17:30 in Kolkata. London uses the Europe/London time zone (UTC+0), while Kolkata uses Asia/Kolkata (UTC+5:30).

Time Zone Details: London vs Kolkata

Best Time to Schedule a Call

There are 2 overlapping business hours between London and Kolkata (assuming 9:00–17:00 in each city). The ideal window for calls and meetings is:

Hour-by-Hour Time Conversion

Use this table to quickly convert any hour from London time to Kolkata time. Rows highlighted in green indicate overlapping business hours in both cities.

Daylight Saving Time (DST) Impact

Neither London nor Kolkata is currently observing daylight saving time. If either city observes DST, the time difference will change by 1 hour when DST begins or ends. Always double-check before scheduling across these time zones during March–April and October–November.

Practical Tips for London–Kolkata Scheduling

• Video calls: Target the 2-hour overlap window listed above. Both teams will be within normal working hours.
• Email and async work: Send messages at the end of your workday so they arrive at the start of theirs. With a 5 hours and 30 minutes offset, replies will often land by your next morning.
• Flight arrivals: A direct flight between these cities can cross 5 time zones. Factor in jet lag recovery — most travelers need roughly one day per hour of time difference to fully adjust.
• Use UTC as a neutral reference when coordinating with three or more time zones at once.

Compare London and Kolkata with Other Cities

From London

From Kolkata

Frequently Asked Questions

What is the time difference between London and Kolkata?

The time difference is 5 hours and 30 minutes. Kolkata is 5 hours and 30 minutes ahead of London.

Does the time difference change during the year?

It can. If either London or Kolkata observes daylight saving time, the gap will shift by 1 hour during the transition periods (typically March–April and October–November).

When is the best time to call from London to Kolkata?

The best window is between 09:00 and 11:30 London time, which corresponds to 14:30–17:00 in Kolkata. Both sides fall within normal business hours.

How do I convert London time to Kolkata time?

Add 5 hours and 30 minutes to London time to get Kolkata time. Use the hour-by-hour table above for a quick reference.

Related Pages

• Current time in London — live clock, time zone details, DST status
• Current time in Kolkata — live clock, time zone details, DST status
• Time Difference Calculator — compare any two cities
• UTC+0 countries and cities
• UTC+5:30 countries and cities
• Current UTC Time
• All World Time Zones
• What Is a Time Zone?

For sunrise and sunset data, visit TheSunsetTimes.com. For detailed DST schedules, see DaylightSavingTime.info.