CST to IST Time Converter
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). The difference changes because the two zones change their clocks at different times.
Pick a date and time above for an exact conversion that accounts for daylight saving, or use the table below for a quick look-up.
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 |
IST time = CST time + 11:30 hours
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 (valid in January and whenever Central Time is on CST)
| 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 (valid in July and whenever Central Time is on CDT)
| 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 hours fall between 9 AM and 6 PM in both cities:
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.
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). The difference changes because the two zones change their clocks at different times.
Does IST observe daylight saving time?
No. India Standard Time stays on the same offset all year. Central Time does change its clocks, which is why the difference varies by season.
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.
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Last updated . Formulas are shown on the page and checked against the worked example.
This calculator is for general information and education only. It is not professional advice. Confirm important decisions with a qualified adviser.