Kolkata to London Time Converter
London is -4h 30m behind Kolkata
Quick converter
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FROM
Kolkata
India
UTC+05:30
TO
London
United Kingdom
UTC+01:00
Date-aware conversion
Convert a specific date and time
Result
Tue, May 26, 2026 11:59
Kolkata: Tuesday, May 26, 2026 4:29 PM GMT+5:30 to London: Tuesday, May 26, 2026 11:59 AM GMT+1.
London is 4h 30m behind Kolkata on this date
24-Hour Comparison
Every hour in Kolkata and the corresponding time in London. Green rows indicate business hours in London.
Time zones
Kolkata uses Asia/Kolkata (GMT+5:30) and London uses Europe/London (GMT+1). 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 London. For teams across more cities, open the meeting planner and compare up to five locations.
Plan a meetingMeeting guidance
Best time for Kolkata and London
The easiest overlap starts around 2:00 PM and runs through 5:00 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 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.
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.
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