Convert CST to IST
IST is 10½ or 11½ hours ahead of CST
9:00 AM CST is 8:30 PM IST in January and 7:30 PM in July.
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Good to know
India is 11½ hours ahead of Chicago in winter and 10½ in summer. Only the US changes its clocks, so the gap moves on the second Sunday in March and the first Sunday in November.
CST to IST time table
Times on 15 January and 15 July 2026; the difference changes with daylight saving.
| CST | IST (January) | IST (July) |
|---|---|---|
| 6:00 AM | 5:30 PM | 4:30 PM |
| 8:00 AM | 7:30 PM | 6:30 PM |
| 9:00 AM | 8:30 PM | 7:30 PM |
| 10:00 AM | 9:30 PM | 8:30 PM |
| 12:00 PM | 11:30 PM | 10:30 PM |
| 2:00 PM | 1:30 AM (next day) | 12:30 AM (next day) |
| 4:00 PM | 3:30 AM (next day) | 2:30 AM (next day) |
| 5:00 PM | 4:30 AM (next day) | 3:30 AM (next day) |
| 6:00 PM | 5:30 AM (next day) | 4:30 AM (next day) |
| 8:00 PM | 7:30 AM (next day) | 6:30 AM (next day) |
| 10:00 PM | 9:30 AM (next day) | 8:30 AM (next day) |
When the difference changes
IST is 10½ or 11½ hours ahead of CST — in 2026:
- Until 8 March: 11½ hours ahead
- From 8 March to 1 November: 10½ hours ahead
- From 1 November: 11½ hours ahead
The gap moves because the two places change their clocks on different dates, or only one of them changes at all.
Worked out from the IANA time zone database for 2026; the converter above uses the rules for whatever date you enter.
Related conversions
- PST to EST
- EST to PST
- EST to CST
- CST to EST
- PST to CST
- EST to IST
- IST to EST
- IST to PST
- UTC to EST
- UTC to PST
- GMT to EST
- CET to EST
- London to New York
Other places? The full Time Zone Converter converts between any of the world's time zones, with daylight saving handled for each date, and the Unit Converters page lists the rest.
CST to IST — questions
What is the time difference between CST and IST?
IST is 10½ or 11½ hours ahead of CST. In 2026: 11½ hours until 8 March, 10½ hours from 8 March to 1 November, 11½ hours from 1 November. It changes because the two places change their clocks on different dates. India is 11½ hours ahead of Chicago in winter and 10½ in summer. Only the US changes its clocks, so the gap moves on the second Sunday in March and the first Sunday in November.
If it is 9 AM CST, what time is it IST?
8:30 PM in January, 7:30 PM in July IST.
What time is 5 PM IST in CST?
5:30 AM in January, 6:30 AM in July CST.