India
United Kingdom
Kolkata to London Time Difference
London is 4.5 hours behind Kolkata
Kolkata vs London — At a Glance
Kolkata to London — Hour-by-Hour
About Kolkata and London
Kolkata (population: 14.9M) is known for cultural capital of India, Howrah Bridge, and the Durga Puja festival. London (population: 8.8M) is known for global finance, the City of London, Buckingham Palace, and the world's oldest underground railway.
Business Hours Overlap
The best window for business calls between Kolkata and London is 9:00 AM–0.5:00 PM Kolkata time (1.5:00 PM–5:00 PM in London).
Calling Between Cities
To call London (+44) from Kolkata (+91), aim for late morning or early afternoon in Kolkata — that corresponds to morning hours in London when people are usually available.
Currency
Kolkata uses INR while London uses GBP. Check current exchange rates before making payments or transferring funds between the two cities.
Language
Kolkata and London share English as a common language, which simplifies business communication.
Use our world clock tool to compare Kolkata and London visually, or browse more timezone conversions.
Frequently Asked Questions
What is the time difference between Kolkata and London?
London, United Kingdom is 4.5 hours behind Kolkata, India. Kolkata is in the Asia/Kolkata timezone (UTC+5:30) and London is in the Europe/London timezone (UTC+1).
When it's noon in Kolkata, what time is it in London?
When it's 12:00 PM (noon) in Kolkata, it's 7:30 AM in London.
What is the best time to call London from Kolkata?
The best time to call London from Kolkata is during the overlapping business hours. When it's 9 AM in Kolkata, it's 4:30 AM in London. Aim for late morning to early afternoon in Kolkata for the best chance of reaching someone during working hours.
What currency does London use?
London, United Kingdom uses GBP. Kolkata uses INR. You will need to check the current exchange rate for transactions between the two.
What language is spoken in London?
The primary language in London is English. Kolkata also speaks English, making communication easier.
How do I dial London from Kolkata?
To call London from Kolkata, dial your international access code followed by +44 and the local number. Kolkata uses country code +91 and London uses +44.
