Time difference between Istanbul and Kolkata
2h 30m
Kolkata is 2h 30m ahead of Istanbul.
Does daylight saving change it?
No. The gap is the same all year. Neither city observes daylight saving.
Overlapping work hours
Between 09:00 and 16:00 in Istanbul, Kolkata is also at work — 7 hours a day.
Istanbul time → Kolkata time
| 00:00 | 02:30 |
|---|---|
| 01:00 | 03:30 |
| 02:00 | 04:30 |
| 03:00 | 05:30 |
| 04:00 | 06:30 |
| 05:00 | 07:30 |
| 06:00 | 08:30 |
| 07:00 | 09:30 |
| 08:00 | 10:30 |
| 09:00 | 11:30 |
| 10:00 | 12:30 |
| 11:00 | 13:30 |
| 12:00 | 14:30 |
| 13:00 | 15:30 |
| 14:00 | 16:30 |
| 15:00 | 17:30 |
| 16:00 | 18:30 |
| 17:00 | 19:30 |
| 18:00 | 20:30 |
| 19:00 | 21:30 |
| 20:00 | 22:30 |
| 21:00 | 23:30 |
| 22:00 | 00:30next day |
| 23:00 | 01:30next day |
Standard time (January). During daylight saving each row shifts by an hour.
Frequently asked questions
Q. How many hours is Istanbul ahead of Kolkata?
2h 30m on standard time.
Q. What time is it in Kolkata when it is noon in Istanbul?
Read the 12:00 row of the 24-hour table below. The table is on standard time, so each row shifts an hour during daylight saving.
Q. When should we schedule a meeting?
The two cities' work hours (09:00–18:00) overlap for 7 hours a day. Anything inside that window catches both sides at work.