Buenos Aires to Kolkata (Calcutta): time difference
Kolkata (Calcutta) is 8 h 30 min ahead of Buenos Aires. Live clocks for both, the working hours they share, and how each one sits against your own time.
🇮🇳 Kolkata (Calcutta), India
04
- India Standard Time
- UTC+5:30
- Daytime
☀️ 05:32 · 🌙 17:17 · 11 h 46 min
+8 h 30 min
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Buenos Aires 00:29 12:29 AM Kolkata (Calcutta) 08:59 8:59 AM You –:–
00:29 12:29 AM
Argentina Standard Time · UTC-3
☀️ 06:20 · 🌙 19:03
08:59 8:59 AM
India Standard Time · UTC+5:30
☀️ 05:32 · 🌙 17:17
·
+8 h 30 min
Kolkata (Calcutta) is 8 h 30 min ahead of Buenos Aires.
When you, Buenos Aires and Kolkata (Calcutta) are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇦🇷 Buenos Aires
0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM
🇮🇳 Kolkata (Calcutta)
8:30 8:30 AM 9:30 9:30 AM 10:30 10:30 AM 11:30 11:30 AM 12:30 12:30 PM 13:30 1:30 PM 14:30 2:30 PM 15:30 3:30 PM 16:30 4:30 PM 17:30 5:30 PM 18:30 6:30 PM 19:30 7:30 PM 20:30 8:30 PM 21:30 9:30 PM 22:30 10:30 PM 23:30 11:30 PM 0:30 12:30 AM 1:30 1:30 AM 2:30 2:30 AM 3:30 3:30 AM 4:30 4:30 AM 5:30 5:30 AM 6:30 6:30 AM 7:30 7:30 AM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇦🇷 Buenos Aires | 🇮🇳 Kolkata (Calcutta) |
|---|---|---|
| Local time | 00:29 | 08:59 |
| Local date | Saturday, October 10, 2026 | Saturday, October 10, 2026 |
| Time zone | Argentina Standard Time | India Standard Time |
| UTC offset | UTC-3 | UTC+5:30 |
| Offset from Buenos Aires | — | +8 h 30 min |
| IANA zone | America/Argentina/Buenos Aires | Asia/Kolkata |
| Daylight saving | Not observed | Not observed |
| Sunrise | 06:20 | 05:32 |
| Sunset | 19:03 | 17:17 |
| Daylight | 12 h 43 min | 11 h 46 min |
| People on this clock | 2,891,082 | 4,486,679 |
Compare Buenos Aires with another city
More comparisons with Buenos Aires: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Buenos Aires and Kolkata (Calcutta): common questions
How many hours ahead of Buenos Aires is Kolkata (Calcutta)?
The clocks in Kolkata are 8 hours and 30 minutes ahead of those in Buenos Aires (UTC+5:30 and UTC−3).
If it is 9:00 AM in Buenos Aires, what time is it in Kolkata (Calcutta)?
At 9:00 AM in Buenos Aires, clocks in Kolkata show 5:30 PM.
What time is it in Kolkata (Calcutta) when it is 6:00 PM in Buenos Aires?
When it is 6:00 PM in Buenos Aires, it is 2:30 AM (the next day) in Kolkata.
When is a good time to call Kolkata (Calcutta) from Buenos Aires?
Between 9:00 AM and 9:30 AM in Buenos Aires – that is 5:30 PM to 6:00 PM in Kolkata – both places are within working hours (9:00 AM–6:00 PM).
When is it already the next day in Kolkata (Calcutta)?
From 3:30 PM in Buenos Aires it is already the next day in Kolkata. The other way round, until 8:30 AM in Kolkata it is still the previous day in Buenos Aires.
Does the time difference between Buenos Aires and Kolkata (Calcutta) change?
No. Neither place uses daylight saving time, so the difference stays 8 hours and 30 minutes all year.
