Vietnam
India
Hanoi to Kolkata Time Difference
Kolkata is 1.5 hours behind Hanoi
Hanoi vs Kolkata — At a Glance
Hanoi to Kolkata — Hour-by-Hour
About Hanoi and Kolkata
Hanoi (population: 8.1M) is known for Vietnam's capital, Ho Chi Minh Mausoleum, Old Quarter, and pho cuisine. Kolkata (population: 14.9M) is known for cultural capital of India, Howrah Bridge, and the Durga Puja festival.
Business Hours Overlap
Hanoi is a national capital, so official government hours (typically 9 AM–5 PM) are the primary window for diplomatic and administrative communication with Kolkata.
Calling Between Cities
Calling between Hanoi (+84) and Kolkata (+91) is convenient — the time difference is small enough that you're unlikely to disturb anyone during normal waking hours.
Currency
Hanoi uses VND while Kolkata uses INR. Check current exchange rates before making payments or transferring funds between the two cities.
Language
Hanoi primarily speaks Vietnamese, while Kolkata speaks Bengali and English and Hindi. For business communication, English is commonly used as a bridge language in international settings.
Use our world clock tool to compare Hanoi and Kolkata visually, or browse more timezone conversions.
Frequently Asked Questions
What is the time difference between Hanoi and Kolkata?
Kolkata, India is 1.5 hours behind Hanoi, Vietnam. Hanoi is in the Asia/Bangkok timezone (UTC+7) and Kolkata is in the Asia/Kolkata timezone (UTC+5:30).
When it's noon in Hanoi, what time is it in Kolkata?
When it's 12:00 PM (noon) in Hanoi, it's 10:30 AM in Kolkata.
What is the best time to call Kolkata from Hanoi?
With only a 1.5-hour difference, you can comfortably call Kolkata anytime during standard business hours (9 AM–6 PM Hanoi time).
What currency does Kolkata use?
Kolkata, India uses INR. Hanoi uses VND. 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. English is widely used for international business communication.
How do I dial Kolkata from Hanoi?
To call Kolkata from Hanoi, dial your international access code followed by +91 and the local number. Hanoi uses country code +84 and Kolkata uses +91.
