Chicago to Kolkata Time Converter
Kolkata is 11 hours 30 minutes ahead of Chicago right now. 9:00 AM in Chicago is 8:30 PM in Kolkata.
Time now: Chicago and Kolkata
Kolkata is 11 hours 30 minutes ahead of Chicago right now. The gap is not fixed: it is 10 hours 30 minutes at some times of the year and 11 hours 30 minutes at others, because at least one of them changes its clocks for daylight saving time.
Chicago and Kolkata are about 12,841 km (7,979 miles) apart in a straight line. Right now Chicago is on CST (UTC-06:00) and Kolkata is on IST (UTC+05:30).
Chicago to Kolkata conversion table
Every hour of the day, using today's time difference.
| Chicago | Kolkata |
|---|---|
| 12:00 AM | 11:30 AM |
| 1:00 AM | 12:30 PM |
| 2:00 AM | 1:30 PM |
| 3:00 AM | 2:30 PM |
| 4:00 AM | 3:30 PM |
| 5:00 AM | 4:30 PM |
| 6:00 AM | 5:30 PM |
| 7:00 AM | 6:30 PM |
| 8:00 AM | 7:30 PM |
| 9:00 AM | 8:30 PM |
| 10:00 AM | 9:30 PM |
| 11:00 AM | 10:30 PM |
| 12:00 PM | 11:30 PM |
| 1:00 PM | 12:30 AMnext day |
| 2:00 PM | 1:30 AMnext day |
| 3:00 PM | 2:30 AMnext day |
| 4:00 PM | 3:30 AMnext day |
| 5:00 PM | 4:30 AMnext day |
| 6:00 PM | 5:30 AMnext day |
| 7:00 PM | 6:30 AMnext day |
| 8:00 PM | 7:30 AMnext day |
| 9:00 PM | 8:30 AMnext day |
| 10:00 PM | 9:30 AMnext day |
| 11:00 PM | 10:30 AMnext day |
Best time to meet between Chicago and Kolkata
There is no overlap between 9 AM and 6 PM in both places.
If both sides can be flexible (7 AM – 10 PM):
- 7:00 AM – 11:00 AM Chicago = 6:30 PM – 10:30 PM Kolkata
- 8:00 PM – 10:00 PM Chicago = 7:30 AM – 9:30 AM Kolkata
The time difference changes during the year because of daylight saving time, so these windows shift by an hour at other times.
Does the time difference between Chicago and Kolkata change?
Yes. Right now Kolkata is 11 hours 30 minutes ahead of Chicago. These are the dates in the next 12 months when the gap changes:
- Sunday, 14 March 2027: Chicago moves its clocks forward. Kolkata is 10 hours 30 minutes ahead of Chicago from then (it was 11 hours 30 minutes before).
- Sunday, 7 November 2027: Chicago moves its clocks back. Kolkata is 11 hours 30 minutes ahead of Chicago from then (it was 10 hours 30 minutes before).
Office hours in each other's time
- 9 AM to 6 PM in Chicago is 8:30 PM to 5:30 AM (next day) in Kolkata.
- 9 AM to 6 PM in Kolkata is 9:30 PM (previous day) to 6:30 AM in Chicago.
Based on today's clock settings.
Frequently asked questions
What is the time difference between Chicago and Kolkata?
Kolkata is 11 hours 30 minutes ahead of Chicago right now. The gap is not fixed: it is 10 hours 30 minutes at some times of the year and 11 hours 30 minutes at others, because at least one of them changes its clocks for daylight saving time.
How do I convert Chicago to Kolkata?
Add 11 hours 30 minutes to the Chicago time to get the Kolkata time (at today's difference). 9:00 AM in Chicago is 8:30 PM in Kolkata. Or use the converter above and pick any date and time.
What is the current time in Kolkata?
It is 4:51 AM in Kolkata on Tuesday, November 10 (the converter above shows it live). At the same moment it is 5:21 PM in Chicago.
Does the time difference between Chicago and Kolkata change during the year?
Yes. Right now Kolkata is 11 hours 30 minutes ahead of Chicago. Over the next 12 months the gap changes 2 times: Sunday, 14 March 2027: Chicago moves its clocks forward. Kolkata is 10 hours 30 minutes ahead of Chicago from then (it was 11 hours 30 minutes before). Sunday, 7 November 2027: Chicago moves its clocks back. Kolkata is 11 hours 30 minutes ahead of Chicago from then (it was 10 hours 30 minutes before).
What is the best time for a meeting between Chicago and Kolkata?
The two places have no shared working hours (9 AM – 6 PM). The nearest option is 7:00 AM – 11:00 AM Chicago = 6:30 PM – 10:30 PM Kolkata.