Kolkata, India Hanoi, Vietnam
Compare time between Kolkata and Hanoi
Date
Time format
Kolkata, India
6:34
PM
Friday, August 21, 2026
Hanoi, Vietnam
8:04
PM
Friday, August 21, 2026
Time Difference Timeline
See the time difference throughout the day
Day time
Night time
Time difference
1h 30m
Best time to meet
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Quick facts
Kolkata time zone: IST (UTC+5:30)
Hanoi time zone: +07 (UTC+7)
Distance: Kolkata → Hanoi
Frequently Asked Questions
Kolkata is in the IST timezone (UTC+5:30) and Hanoi is in the +07 timezone (UTC+7). The time difference between them is 1h 30m.
Use the timeline above to find overlapping business hours between Kolkata and Hanoi. The "Best time to meet" card highlights the window where both cities are within working hours (9 AM – 6 PM local time).
Neither Kolkata nor Hanoi observes Daylight Saving Time, so the time difference remains constant throughout the year.
Click the pencil icon next to the Kolkata clock and type any time. The Hanoi clock will update instantly, showing the exact corresponding time. You can also pick a date to account for DST changes.