London to Kolkata Time Converter
Kolkata is +4h 30m ahead of London
Quick converter
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FROM
London
United Kingdom
UTC+01:00
TO
Kolkata
India
UTC+05:30
Date-aware conversion
Convert a specific date and time
Result
Wed, May 27, 2026 18:21
London: Wednesday, May 27, 2026 1:51 PM GMT+1 to Kolkata: Wednesday, May 27, 2026 6:21 PM GMT+5:30.
Kolkata is 4h 30m ahead of London on this date
24-Hour Comparison
Every hour in London and the corresponding time in Kolkata. Green rows indicate business hours in Kolkata.
Time zones
London uses Europe/London (GMT+1) and Kolkata uses Asia/Kolkata (GMT+5:30). The difference can shift during daylight saving changes, so checking the exact date matters.
Best use
Use the green rows to spot normal working hours in Kolkata. For teams across more cities, open the meeting planner and compare up to five locations.
Plan a meetingMeeting guidance
Best time for London and Kolkata
The easiest overlap starts around 9:00 AM and runs through 1:00 PM in the source city, while the destination city is also inside normal working hours. For important calls, check the meeting date because the offset can change when either location enters or leaves daylight saving time.
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City context
About these cities
About London
London is located in United Kingdom (Europe). It uses the Europe/London timezone with a standard offset of UTC+01:00. It observes DST, switching between GMT and BST. See the full London time page for live clock and planning details.
About Kolkata
Kolkata is located in India (Asia). It uses the Asia/Kolkata timezone with a standard offset of UTC+05:30. It does not observe Daylight Saving Time. See the full Kolkata time page for live clock and planning details.
Frequently Asked Questions
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