Chicago to Kolkata Time Difference
Kolkata is 10 hours 30 min ahead of Chicago. When it is noon in Chicago, it is 22.5:00 in Kolkata.
Chicago (UTC-5) → Kolkata (UTC+5:30)
🕐 Interactive Time Explorer
When it's 20:00 in Chicago, it's 6.5:00 in Kolkata
Drag the slider to see corresponding times in both cities
🤝 Best Meeting Times
Chicago & Kolkata◐ Extended Hours (2 hours)
✈️ Travel Information
Distance
12,837 km
Est. Flight Time
~16.1h
Time Difference
+10.5h
Work Hours Overlap
0h
None
🔴 Office Closed
No overlap available
No overlap
⏰ Quick Conversion
06:00
Chicago
16.5:00
Kolkata
09:00
Chicago
19.5:00
Kolkata
12:00
Chicago
22.5:00
Kolkata
15:00
Chicago
1.5:00
Kolkata (+1)
18:00
Chicago
4.5:00
Kolkata (+1)
21:00
Chicago
7.5:00
Kolkata (+1)
00:00
Chicago
10.5:00
Kolkata
03:00
Chicago
13.5:00
Kolkata
Frequently Asked Questions
How many hours is Chicago behind Kolkata?
Kolkata is 10 hours 30 min ahead of Chicago. When it is 12:00 noon in Chicago, it is 22.5:00 in Kolkata. Chicago operates on America/Chicago (UTC-5), while Kolkata uses Asia/Kolkata (UTC+5.5).
What is the best time to call Kolkata from Chicago?
Standard business hours (9 AM–5 PM) do not overlap between Chicago and Kolkata due to the 10 hours 30 min difference. Consider early morning or late evening calls, or use async communication.
Does the Chicago to Kolkata time difference change throughout the year?
The time difference can shift by up to one hour when either city observes Daylight Saving Time (DST). DST transition dates differ between countries — typically March/April in the Northern Hemisphere and October in the Southern Hemisphere. Always verify the live difference above when scheduling important meetings near DST changeover dates.
Flying between Chicago and Kolkata
The distance between Chicago and Kolkata is approximately 12,837 km. A direct flight typically takes around 16.1 hours. Your arrival clock will show local Kolkata time — use our Flight Time Calculator to predict exact arrival times.