United Kingdom
India
London to Kolkata Time Difference
Kolkata is 4.5 hours ahead of London
London vs Kolkata — At a Glance
London to Kolkata — Hour-by-Hour
About London and Kolkata
London (population: 8.8M) is known for global finance, the City of London, Buckingham Palace, and the world's oldest underground railway. Kolkata (population: 14.9M) is known for cultural capital of India, Howrah Bridge, and the Durga Puja festival.
Business Hours Overlap
The best window for business calls between London and Kolkata is 1.5:00 PM–5:00 PM London time (9:00 AM–0.5:00 PM in Kolkata).
Calling Between Cities
To call Kolkata (+91) from London (+44), aim for late morning or early afternoon in London — that corresponds to evening hours in Kolkata when people are usually available.
Currency
London uses GBP while Kolkata uses INR. Check current exchange rates before making payments or transferring funds between the two cities.
Language
London and Kolkata share English as a common language, which simplifies business communication.
Use our world clock tool to compare London and Kolkata visually, or browse more timezone conversions.
Frequently Asked Questions
What is the time difference between London and Kolkata?
Kolkata, India is 4.5 hours ahead of London, United Kingdom. London is in the Europe/London timezone (UTC+1) and Kolkata is in the Asia/Kolkata timezone (UTC+5:30).
When it's noon in London, what time is it in Kolkata?
When it's 12:00 PM (noon) in London, it's 4:30 PM in Kolkata.
What is the best time to call Kolkata from London?
The best time to call Kolkata from London is during the overlapping business hours. When it's 9 AM in London, it's 1:30 PM in Kolkata. Aim for late morning to early afternoon in London for the best chance of reaching someone during working hours.
What currency does Kolkata use?
Kolkata, India uses INR. London uses GBP. You will need to check the current exchange rate for transactions between the two.
What language is spoken in Kolkata?
The primary languages in Kolkata are Bengali, English, Hindi. London also speaks English, making communication easier.
How do I dial Kolkata from London?
To call Kolkata from London, dial your international access code followed by +91 and the local number. London uses country code +44 and Kolkata uses +91.
