🇮🇳 India
IST · UTC+5:30
7:32 PM
UTC+05:30
🕐 IST to CST Converter
Convert India Standard Time (IST) to Central Standard Time (CST). 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 PM IST is 9:30 AM CST.
If Central is on CST
9:30 PMCST
(previous day)
If Central is on CDT
10:30 PMCDT
(previous day)
Hour by hour: India vs Chicago
🇺🇸 Chicago
Central Time (CST/CDT)
9:02 AM
UTC-05:00
Dark = night · Light = morning/evening · Green = working hours (9–6) · Hatched = weekend. Click an hour to compare the same moment across rows.
IST to CST conversion table
| IST (India) | CST (UTC−6, winter) |
|---|---|
| 12:00 AM | 12:30 PM (previous day) |
| 12:30 AM | 1:00 PM (previous day) |
| 1:00 AM | 1:30 PM (previous day) |
| 1:30 AM | 2:00 PM (previous day) |
| 2:00 AM | 2:30 PM (previous day) |
| 2:30 AM | 3:00 PM (previous day) |
| 3:00 AM | 3:30 PM (previous day) |
| 3:30 AM | 4:00 PM (previous day) |
| 4:00 AM | 4:30 PM (previous day) |
| 4:30 AM | 5:00 PM (previous day) |
| 5:00 AM | 5:30 PM (previous day) |
| 5:30 AM | 6:00 PM (previous day) |
| 6:00 AM | 6:30 PM (previous day) |
| 6:30 AM | 7:00 PM (previous day) |
| 7:00 AM | 7:30 PM (previous day) |
| 7:30 AM | 8:00 PM (previous day) |
| 8:00 AM | 8:30 PM (previous day) |
| 8:30 AM | 9:00 PM (previous day) |
| 9:00 AM | 9:30 PM (previous day) |
| 9:30 AM | 10:00 PM (previous day) |
| 10:00 AM | 10:30 PM (previous day) |
| 10:30 AM | 11:00 PM (previous day) |
| 11:00 AM | 11:30 PM (previous day) |
| 11:30 AM | 12:00 AM |
| 12:00 PM | 12:30 AM |
| 12:30 PM | 1:00 AM |
| 1:00 PM | 1:30 AM |
| 1:30 PM | 2:00 AM |
| 2:00 PM | 2:30 AM |
| 2:30 PM | 3:00 AM |
| 3:00 PM | 3:30 AM |
| 3:30 PM | 4:00 AM |
| 4:00 PM | 4:30 AM |
| 4:30 PM | 5:00 AM |
| 5:00 PM | 5:30 AM |
| 5:30 PM | 6:00 AM |
| 6:00 PM | 6:30 AM |
| 6:30 PM | 7:00 AM |
| 7:00 PM | 7:30 AM |
| 7:30 PM | 8:00 AM |
| 8:00 PM | 8:30 AM |
| 8:30 PM | 9:00 AM |
| 9:00 PM | 9:30 AM |
| 9:30 PM | 10:00 AM |
| 10:00 PM | 10:30 AM |
| 10:30 PM | 11:00 AM |
| 11:00 PM | 11:30 AM |
| 11:30 PM | 12:00 PM |
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.
Guides you may find useful
Scheduling
Best Time for Meetings Between India and the US
India and the US barely share working hours. See the best meeting windows for Eastern, Central and Pacific…
Guides
US Time Zones Explained: Map, Abbreviations & Cheat Sheet
The six main US time zones with abbreviations, UTC offsets and example cities, plus split states, places…
Daylight saving
Daylight Saving Time 2026: Exact Dates for US, UK & Europe
When do the clocks change in 2026? Exact dates and times for the US, Canada, UK, Europe, Australia, New…
Other time zone conversions
From India time (IST)
To India time (IST)
Frequently asked questions
What is the time difference between IST and CST?
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 IST to CST?
Subtract 11 hours 30 minutes to get CST from the IST time. Example: 9:00 PM IST is 9:30 AM CST. 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).