🇺🇸 Chicago
Central Time (CST/CDT)
9:02 AM
UTC-05:00
🕐 CST to IST Converter
Convert Central Standard Time (CST) to India Standard Time (IST). IST is 11 hours 30 minutes ahead of CST (UTC−6). Enter a time below, or scan the hour-by-hour grid and table.
Quick answer: IST is 11 hours 30 minutes ahead of CST (UTC−6). Example: 9:00 AM CST is 8:30 PM IST.
If it's CST (winter)
8:30 PMIST
same day
If it's CDT (summer)
7:30 PMIST
same day
Hour by hour: Chicago vs India
🇮🇳 India
IST · UTC+5:30
7:32 PM
UTC+05:30
Dark = night · Light = morning/evening · Green = working hours (9–6) · Hatched = weekend. Click an hour to compare the same moment across rows.
CST to IST conversion table
| CST (US Central) | IST (India) |
|---|---|
| 12:00 AM | 11:30 AM |
| 12:30 AM | 12:00 PM |
| 1:00 AM | 12:30 PM |
| 1:30 AM | 1:00 PM |
| 2:00 AM | 1:30 PM |
| 2:30 AM | 2:00 PM |
| 3:00 AM | 2:30 PM |
| 3:30 AM | 3:00 PM |
| 4:00 AM | 3:30 PM |
| 4:30 AM | 4:00 PM |
| 5:00 AM | 4:30 PM |
| 5:30 AM | 5:00 PM |
| 6:00 AM | 5:30 PM |
| 6:30 AM | 6:00 PM |
| 7:00 AM | 6:30 PM |
| 7:30 AM | 7:00 PM |
| 8:00 AM | 7:30 PM |
| 8:30 AM | 8:00 PM |
| 9:00 AM | 8:30 PM |
| 9:30 AM | 9:00 PM |
| 10:00 AM | 9:30 PM |
| 10:30 AM | 10:00 PM |
| 11:00 AM | 10:30 PM |
| 11:30 AM | 11:00 PM |
| 12:00 PM | 11:30 PM |
| 12:30 PM | 12:00 AM (next day) |
| 1:00 PM | 12:30 AM (next day) |
| 1:30 PM | 1:00 AM (next day) |
| 2:00 PM | 1:30 AM (next day) |
| 2:30 PM | 2:00 AM (next day) |
| 3:00 PM | 2:30 AM (next day) |
| 3:30 PM | 3:00 AM (next day) |
| 4:00 PM | 3:30 AM (next day) |
| 4:30 PM | 4:00 AM (next day) |
| 5:00 PM | 4:30 AM (next day) |
| 5:30 PM | 5:00 AM (next day) |
| 6:00 PM | 5:30 AM (next day) |
| 6:30 PM | 6:00 AM (next day) |
| 7:00 PM | 6:30 AM (next day) |
| 7:30 PM | 7:00 AM (next day) |
| 8:00 PM | 7:30 AM (next day) |
| 8:30 PM | 8:00 AM (next day) |
| 9:00 PM | 8:30 AM (next day) |
| 9:30 PM | 9:00 AM (next day) |
| 10:00 PM | 9:30 AM (next day) |
| 10:30 PM | 10:00 AM (next day) |
| 11:00 PM | 10:30 AM (next day) |
| 11:30 PM | 11:00 AM (next day) |
CST vs undefined — which one do I use?
US Central Time switches between CST (UTC−6) and undefined (UTC±NaN). Daylight time (undefined) runs from the second Sunday in March to the first Sunday in November. India never changes, so the IST gap is 11 hours 30 minutes in winter and NaN hours in summer.
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Daylight saving
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Other time zone conversions
From India time (IST)
To India time (IST)
Frequently asked questions
What is the time difference between CST and IST?
IST is 11 hours 30 minutes ahead of CST (UTC−6). Because India does not observe daylight saving time, the gap changes by one hour when the US clocks change.
How do I convert CST to IST?
Add 11 hours 30 minutes to a CST time to get IST. Example: 9:00 AM CST is 8:30 PM IST. Use the converter above or the table below.
Is it CST or undefined right now?
US Central Time uses undefined (UTC±NaN) from the second Sunday in March to the first Sunday in November, and CST (UTC−6) the rest of the year. Most people say "CST" for whichever Central time is in force, so check which one applies on your date. The converter shows both answers.
Does India (IST) have daylight saving time?
No. India uses a single time zone, India Standard Time (UTC+5:30), all year, with no daylight saving. Only the other side of the conversion can change.
Does IST here mean India Standard Time?
Yes. IST is also used for Irish Standard Time and Israel Standard Time, but on this page IST always means India Standard Time (UTC+5:30).