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)

Chicago

United States

⏱️10 hours 30 min ahead
15:37

Sat, Apr 18

📞 +1💱 USD

Kolkata

India

02:07

Sun, Apr 19

📞 +91💱 INR

🕐 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

20:00
0:006:0012:0018:0023:00
Chicago
20:00
Kolkata
6.5:00(+1)
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🤝 Best Meeting Times

Chicago & Kolkata
Times shown in Chicago time
Excellent - Both in office
Good - Flexible hours

◐ 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.