CST to IST Time Converter
Content updated .
This page converts Central Time (CST) to India Standard Time (IST). India is 11 hours 30 minutes ahead of Chicago when Chicago is on CST (around January), and 10 hours 30 minutes ahead of when it is on CDT (around July). Daylight saving time changes one or both UTC offsets. These are seasonal examples, not a rule for every date.
Select the actual event date and time above. This page follows the city zones America/Chicago and Asia/Kolkata, not a permanently fixed abbreviation. For example, EST is UTC−5 but New York uses EDT (UTC−4) during daylight saving; PST and PDT likewise differ by an hour. BST means British Summer Time, while London uses GMT in winter. IST on these pages means India Standard Time, not Irish or Israel time.
Daylight saving time (DST, sometimes called daylight savings) can alter a meeting's time difference. Different countries may switch on different weekends, or not switch at all. January and July tables are examples: use a dated conversion around the transition weeks and check the displayed abbreviations.
Current time around the world
| Zone | Local time now | UTC offset |
|---|
The time difference
| Conversion | Add to CST |
|---|---|
| CST to IST | +11:30 |
| CDT to IST | +10:30 |
Destination time = source time + destination UTC offset − source UTC offset (for the event date).
If the result passes midnight, the date moves forward (or back) by a day. The converter above shows the day change explicitly.
CST to IST conversion table
CST to IST — January 15, 2026 example
| Central Time (CST) | India Standard Time (IST) |
|---|---|
| 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 AM (next day) |
| 2:00 PM | 1:30 AM (next day) |
| 3:00 PM | 2:30 AM (next day) |
| 4:00 PM | 3:30 AM (next day) |
| 5:00 PM | 4:30 AM (next day) |
| 6:00 PM | 5:30 AM (next day) |
| 7:00 PM | 6:30 AM (next day) |
| 8:00 PM | 7:30 AM (next day) |
| 9:00 PM | 8:30 AM (next day) |
| 10:00 PM | 9:30 AM (next day) |
| 11:00 PM | 10:30 AM (next day) |
CDT to IST — July 15, 2026 example
| Central Time (CDT) | India Standard Time (IST) |
|---|---|
| 12:00 AM | 10:30 AM |
| 1:00 AM | 11:30 AM |
| 2:00 AM | 12:30 PM |
| 3:00 AM | 1:30 PM |
| 4:00 AM | 2:30 PM |
| 5:00 AM | 3:30 PM |
| 6:00 AM | 4:30 PM |
| 7:00 AM | 5:30 PM |
| 8:00 AM | 6:30 PM |
| 9:00 AM | 7:30 PM |
| 10:00 AM | 8:30 PM |
| 11:00 AM | 9:30 PM |
| 12:00 PM | 10:30 PM |
| 1:00 PM | 11:30 PM |
| 2:00 PM | 12:30 AM (next day) |
| 3:00 PM | 1:30 AM (next day) |
| 4:00 PM | 2:30 AM (next day) |
| 5:00 PM | 3:30 AM (next day) |
| 6:00 PM | 4:30 AM (next day) |
| 7:00 PM | 5:30 AM (next day) |
| 8:00 PM | 6:30 AM (next day) |
| 9:00 PM | 7:30 AM (next day) |
| 10:00 PM | 8:30 AM (next day) |
| 11:00 PM | 9:30 AM (next day) |
Best times for a meeting between Chicago and India
These sample hours fall between 9 AM and 6 PM in both cities on the table dates. Confirm each occurrence of a recurring meeting, especially during March, April, October and November:
When Chicago is on CST: there is no overlap between 9 AM and 6 PM in both zones. One side has to take an early or late call.
When Chicago is on CDT: there is no overlap between 9 AM and 6 PM in both zones. One side has to take an early or late call.
Clock changes, repeated times and time-zone data
A forward clock change skips some local times; a backward change repeats them. If your event falls in the repeated hour, confirm which UTC offset the organiser means. Avoid assuming that a local time alone identifies one instant. Future government decisions can change the rules, and an outdated browser can have outdated time-zone data.
References: IANA Time Zone Database and NIST daylight-saving explanation. US rules are not worldwide rules.
Frequently asked questions
What is the time difference between CST and IST?
India is 11 hours 30 minutes ahead of Chicago when Chicago is on CST (around January), and 10 hours 30 minutes ahead of when it is on CDT (around July). Daylight saving time changes one or both UTC offsets. These are seasonal examples, not a rule for every date.
How does daylight saving affect this conversion?
The calculator follows the dated rules for America/Chicago and Asia/Kolkata. A zone may change its UTC offset for summer, while another may not. India and UTC do not currently observe DST; New York, Chicago, Los Angeles and London do. Check the selected date rather than treating an abbreviation or one seasonal sample as a year-round offset.
What time is 9 AM CST in IST?
9:00 AM CST is 8:30 PM IST, and 9:00 AM CDT is 7:30 PM IST.
How do I convert a different date or time?
Enter the date and time at the top of this page. The converter uses your browser's time zone database, so it applies the correct offset for that specific date, including the weeks around clock changes.
Related calculators and tools
- Time Zone ConverterConvert between any two zones, DST included.
- EST to IST ConverterPlan calls from New York to India using the event date, daylight-saving offsets and day changes.
- PST to IST ConverterPlan calls from Los Angeles to India using the event date, daylight-saving offsets and day changes.
- IST to EST ConverterPlan calls from India to New York using the event date, daylight-saving offsets and day changes.
This calculator is for general information and education only. It is not professional advice. Confirm important decisions with a qualified adviser.