🇮🇳 Kolkata (Calcutta), India
44
- India Standard Time
- UTC+5:30
- Twilight
☀️ 05:32 · 🌙 17:17 · 11 h 46 min
Kolkata (Calcutta) to Istanbul: time difference
Istanbul is 2 h 30 min behind Kolkata (Calcutta). Live clocks for both, the working hours they share, and how each one sits against your own time.
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Kolkata (Calcutta) 17:52 5:52 PM Istanbul 15:22 3:22 PM You –:–
17:52 5:52 PM
India Standard Time · UTC+5:30
☀️ 05:32 · 🌙 17:17
15:22 3:22 PM
GMT+03:00 · UTC+3
☀️ 07:10 · 🌙 18:33
·
−2 h 30 min
Istanbul is 2 h 30 min behind Kolkata (Calcutta).
When you, Kolkata (Calcutta) and Istanbul are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇮🇳 Kolkata (Calcutta)
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
🇹🇷 Istanbul
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 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
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇮🇳 Kolkata (Calcutta) | 🇹🇷 Istanbul |
|---|---|---|
| Local time | 17:52 | 15:22 |
| Local date | Saturday, October 10, 2026 | Saturday, October 10, 2026 |
| Time zone | India Standard Time | GMT+03:00 |
| UTC offset | UTC+5:30 | UTC+3 |
| Offset from Kolkata (Calcutta) | — | −2 h 30 min |
| IANA zone | Asia/Kolkata | Europe/Istanbul |
| Daylight saving | Not observed | Not observed |
| Sunrise | 05:32 | 07:10 |
| Sunset | 17:17 | 18:33 |
| Daylight | 11 h 46 min | 11 h 23 min |
| People on this clock | 4,486,679 | 15,701,602 |
Compare Kolkata (Calcutta) with another city
More comparisons with Kolkata (Calcutta): the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Kolkata (Calcutta) and Istanbul: common questions
How far behind Kolkata (Calcutta) is Istanbul?
Istanbul is 2 hours and 30 minutes behind Kolkata: UTC+3 against UTC+5:30.
If it is 9:00 AM in Kolkata (Calcutta), what time is it in Istanbul?
At 9:00 AM in Kolkata, clocks in Istanbul show 6:30 AM.
What time is it in Istanbul at the end of the working day in Kolkata (Calcutta)?
The working day in Kolkata ends at 6:00 PM; in Istanbul it is 3:30 PM at that moment.
Is there a time when both Kolkata (Calcutta) and Istanbul are at work?
Yes: from 11:30 AM to 6:00 PM in Kolkata (9:00 AM to 3:30 PM in Istanbul), the working days (9:00 AM–6:00 PM) overlap.
When is it still the previous day in Istanbul?
Until 2:30 AM in Kolkata (Calcutta) it is still the previous day in Istanbul. The other way round, from 9:30 PM in Istanbul it is already the next day in Kolkata.
Does the time gap between Kolkata (Calcutta) and Istanbul change during the year?
No, the clocks change neither in Kolkata nor in Istanbul, so the gap is 2 hours and 30 minutes all year round.
