Kolkata to London, United Kingdom
London is 4 hours and 30 minutes behind of Kolkata.
Kolkata
India
Difference
London
United Kingdom
Best window to call: 13:00 - 17:00 Kolkata time, both sides are inside 09:00-17:00.
Hour-by-hour conversion
Every hour of the day in Kolkata with its equivalent in London. Green rows fall inside business hours for both.
About the Kolkata-London gap
Kolkata sits in the Asia/Kolkata time zone (UTC+5:30), while London uses Europe/London (BST). That puts London 4 hours and 30 minutes behind of Kolkata right now.
These two cities do not handle daylight saving the same way, one adjusts its clocks seasonally and the other does not. The difference between them therefore moves by an hour twice a year, which is a common cause of missed meetings. The clocks above always show the live position rather than an assumed offset.
For scheduling, the practical overlap runs from 13:00 to 17:00 in Kolkata. Booking inside that band means neither party is dialling in before breakfast or after dinner.
Related comparisons
- London to Kolkata
- Kolkata to Cardiff
- Kolkata to New York
- Kolkata to Los Angeles
- Kolkata to Chicago
- Kolkata to São Paulo
See also current time in Kolkata and current time in London.
Kolkata and London, questions
- What is the time difference between Kolkata and London?
- London is 4 hours and 30 minutes behind of Kolkata. Kolkata is currently on UTC+5:30 and London on BST.
- What is the best time to call London from Kolkata?
- Between 13:00 and 17:00 Kolkata time, both cities are inside normal business hours of 09:00 to 17:00. Outside that window one side is either not yet at work or has already left.
- Is the difference between Kolkata and London always the same?
- No. One of these cities observes daylight saving time and the other does not, so the gap changes by an hour at each transition. Always check the live clocks rather than relying on a remembered offset.