Time Difference: Istanbul vs Kolkata
Istanbul
6:02:55 AM TRT
Thursday, May 14, 2026
2h 30m
2h 30m
Kolkata
8:32:55 AM IST
Thursday, May 14, 2026
Kolkata is 2.5 hours ahead of Istanbul.
Quick Reference
- Istanbul
- TRT (GMT+3)
No Daylight Saving Time
- Kolkata
- IST (GMT+5:30)
No Daylight Saving Time
Frequently Asked Questions
- What is the time difference between Istanbul and Kolkata?
- Kolkata is 2.5 hours ahead of Istanbul.
- When is the best time to call from Istanbul to Kolkata?
- The best time to call is during overlapping business hours (9 AM – 5 PM) in both cities. Use the interactive converter on this page to visually compare hours side by side.
- Does the time difference change with daylight saving time?
- The time difference may change when either city enters or exits daylight saving time. Istanbul uses TRT and Kolkata uses IST.