India
Vietnam
Kolkata to Hanoi Time Difference
Hanoi is 1.5 hours ahead of Kolkata
Kolkata vs Hanoi — At a Glance
Kolkata to Hanoi — Hour-by-Hour
About Kolkata and Hanoi
Kolkata (population: 14.9M) is known for cultural capital of India, Howrah Bridge, and the Durga Puja festival. Hanoi (population: 8.1M) is known for Vietnam's capital, Ho Chi Minh Mausoleum, Old Quarter, and pho cuisine.
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 Kolkata (+91) and Hanoi (+84) is convenient — the time difference is small enough that you're unlikely to disturb anyone during normal waking hours.
Currency
Kolkata uses INR while Hanoi uses VND. Check current exchange rates before making payments or transferring funds between the two cities.
Language
Kolkata primarily speaks Bengali and English and Hindi, while Hanoi speaks Vietnamese. For business communication, English is commonly used as a bridge language in international settings.
Use our world clock tool to compare Kolkata and Hanoi visually, or browse more timezone conversions.
Frequently Asked Questions
What is the time difference between Kolkata and Hanoi?
Hanoi, Vietnam is 1.5 hours ahead of Kolkata, India. Kolkata is in the Asia/Kolkata timezone (UTC+5:30) and Hanoi is in the Asia/Bangkok timezone (UTC+7).
When it's noon in Kolkata, what time is it in Hanoi?
When it's 12:00 PM (noon) in Kolkata, it's 1:30 PM in Hanoi.
What is the best time to call Hanoi from Kolkata?
With only a 1.5-hour difference, you can comfortably call Hanoi anytime during standard business hours (9 AM–6 PM Kolkata time).
What currency does Hanoi use?
Hanoi, Vietnam uses VND. Kolkata uses INR. You will need to check the current exchange rate for transactions between the two.
What language is spoken in Hanoi?
The primary language in Hanoi is Vietnamese. English is widely used for international business communication.
How do I dial Hanoi from Kolkata?
To call Hanoi from Kolkata, dial your international access code followed by +84 and the local number. Kolkata uses country code +91 and Hanoi uses +84.
