The time difference between Shanghai and Kolkata is 2 hours and 30 minutes. When it is 12:00 noon in Shanghai, it is 09:30 in Kolkata. Shanghai uses the Asia/Shanghai time zone (UTC+8), while Kolkata uses Asia/Kolkata (UTC+5:30).
There are 5 overlapping business hours between Shanghai and Kolkata (assuming 9:00–17:00 in each city). The ideal window for calls and meetings is:
Use this table to quickly convert any hour from Shanghai time to Kolkata time. Rows highlighted in green indicate overlapping business hours in both cities.
| Shanghai | Kolkata | |
|---|---|---|
| 00:00 | 21:30 (-1 day) | Night |
| 01:00 | 22:30 (-1 day) | Night |
| 02:00 | 23:30 (-1 day) | Night |
| 03:00 | 00:30 | Night |
| 04:00 | 01:30 | Night |
| 05:00 | 02:30 | Night |
| 06:00 | 03:30 | |
| 07:00 | 04:30 | |
| 08:00 | 05:30 | |
| 09:00 | 06:30 | |
| 10:00 | 07:30 | |
| 11:00 | 08:30 | |
| 12:00 | 09:30 | Overlap |
| 13:00 | 10:30 | Overlap |
| 14:00 | 11:30 | Overlap |
| 15:00 | 12:30 | Overlap |
| 16:00 | 13:30 | Overlap |
| 17:00 | 14:30 | |
| 18:00 | 15:30 | |
| 19:00 | 16:30 | |
| 20:00 | 17:30 | |
| 21:00 | 18:30 | |
| 22:00 | 19:30 | Night |
| 23:00 | 20:30 | Night |
Neither Shanghai nor Kolkata is currently observing daylight saving time. If either city observes DST, the time difference will change by 1 hour when DST begins or ends. Always double-check before scheduling across these time zones during March–April and October–November.
The time difference is 2 hours and 30 minutes. Kolkata is 2 hours and 30 minutes behind Shanghai.
It can. If either Shanghai or Kolkata observes daylight saving time, the gap will shift by 1 hour during the transition periods (typically March–April and October–November).
The best window is between 11:30 and 17:00 Shanghai time, which corresponds to 09:00–14:30 in Kolkata. Both sides fall within normal business hours.
Subtract 2 hours and 30 minutes from Shanghai time to get Kolkata time. Use the hour-by-hour table above for a quick reference.
For sunrise and sunset data, visit TheSunsetTimes.com. For detailed DST schedules, see DaylightSavingTime.info.