Time difference
Chicago to Kolkata Time Difference
Kolkata is 10 hours and 30 minutes ahead of Chicago — when it's 12:00 PM in Chicago, it's 10:30 PM in Kolkata. (Chicago (America/Chicago, CDT); Kolkata (Asia/Kolkata, IST).) Below: live local times, the best hours for a call, a full conversion table, and exact daylight-saving dates.
Kolkata is 10 hours and 30 minutes ahead of Chicago. Standard 9 AM–5 PM business hours in Chicago and Kolkata do not overlap, so a live call needs one side outside normal hours. Clocks change on November 1, 2026, which briefly shifts the gap between Chicago and Kolkata — the converter on this page always reflects the correct offset for the date you pick.
- When it's 9:00 AM in Chicago, it's 7:30 PM in Kolkata.
- When it's 9:00 AM in Kolkata, it's 10:30 PM the previous day in Chicago.
Kolkata is currently 10 hours and 30 minutes ahead of Chicago.
Interactive converter
12:00PM
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Best times to meet
Standard 9 AM – 5 PM hours in Chicago and Kolkata do not overlap. The least-bad options are an early start in one city or a late evening call in the other — for example a 7–8 AM meeting in Chicago, or a 6–8 PM meeting in Kolkata.
Quick conversion table
| Chicago | Kolkata |
|---|---|
| 12 AM | 10:30 AM |
| 1 AM | 11:30 AM |
| 2 AM | 12:30 PM |
| 3 AM | 1:30 PM |
| 4 AM | 2:30 PM |
| 5 AM | 3:30 PM |
| 6 AM | 4:30 PM |
| 7 AM | 5:30 PM |
| 8 AM | 6:30 PM |
| 9 AM | 7:30 PM |
| 10 AM | 8:30 PM |
| 11 AM | 9:30 PM |
| 12 PM | 10:30 PM |
| 1 PM | 11:30 PM |
| 2 PM | 12:30 AM (next day) |
| 3 PM | 1:30 AM (next day) |
| 4 PM | 2:30 AM (next day) |
| 5 PM | 3:30 AM (next day) |
| 6 PM | 4:30 AM (next day) |
| 7 PM | 5:30 AM (next day) |
| 8 PM | 6:30 AM (next day) |
| 9 PM | 7:30 AM (next day) |
| 10 PM | 8:30 AM (next day) |
| 11 PM | 9:30 AM (next day) |
Daylight saving
On November 1, 2026, Chicago shifts for daylight saving. After that, Kolkata will be 11 hours and 30 minutes ahead of Chicago (currently 10 hours and 30 minutes ahead of Chicago). The converter and the tables above always reflect the correct offset for the date you pick.
- Chicago is currently observing daylight saving time.
- Kolkata does not observe daylight saving time.
Frequently asked questions
- Is Kolkata ahead of or behind Chicago?
- Kolkata is 10 hours and 30 minutes ahead of Chicago.
- How many hours ahead of Chicago is Kolkata?
- Kolkata is 10 hours and 30 minutes ahead of Chicago.
- What time is 9 AM in Chicago in Kolkata?
- 9:00 AM in Chicago is 7:30 PM in Kolkata.
- What time is noon in Chicago in Kolkata?
- 12:00 PM in Chicago is 10:30 PM in Kolkata.
- What time is 5 PM in Chicago in Kolkata?
- 5:00 PM in Chicago is 3:30 AM the next day in Kolkata. Useful for end-of-day handoffs between the two offices.
- What time is 3 PM in Chicago in Kolkata?
- 3:00 PM in Chicago is 1:30 AM the next day in Kolkata.
- Is Chicago currently observing daylight saving time?
- Chicago is currently observing daylight saving time (summer time).
- Is Kolkata currently observing daylight saving time?
- Kolkata does not observe daylight saving time — its UTC offset stays the same all year.
- Do Chicago and Kolkata observe daylight saving?
- On November 1, 2026, Chicago shifts for daylight saving. After that, Kolkata will be 11 hours and 30 minutes ahead of Chicago (currently 10 hours and 30 minutes ahead of Chicago). The converter and the tables above always reflect the correct offset for the date you pick.
- When is the best time to call Kolkata from Chicago?
- Chicago and Kolkata business hours don't overlap. The closest options are early mornings in Chicago or late evenings, when one side stretches outside 9–5.
- When is the best time to call Chicago from Kolkata?
- Kolkata and Chicago business hours don't overlap. The closest options are early mornings in Kolkata or late evenings, when one side stretches outside 9–5.
- Chicago (CDT) to Kolkata (IST) — how do I convert quickly?
- Add 10 hours and 30 minutes to Chicago local time to get Kolkata local time. Or use the converter at the top of this page — it stays accurate through daylight-saving changes automatically.
Other conversions
- Chicago to New York
- Chicago to London
- Chicago to Tokyo
- Chicago to Dubai
- Chicago to Singapore
- Chicago to Los Angeles
- Chicago to Sydney
- Chicago to Paris
- Chicago to Mumbai
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