IST to CST Converter
CST is 11 hours 30 minutes behind IST. 9:00 AM IST = 9:30 PM CST (previous day).
CST is 11 hours 30 minutes behind IST at the moment. To convert IST to CST, subtract 11 hours 30 minutes from the IST time: 9:00 AM IST = 9:30 PM CST (previous day).
IST (India Time) is used in India and Sri Lanka (UTC+5:30, no daylight saving time). CST (Central Time) is used in Chicago, Dallas, Houston, Minneapolis, New Orleans, Winnipeg; Mexico City and Central America use UTC−6 all year.
IST here means India Standard Time, not Irish or Israel Standard Time. CST here means North American Central Standard Time, not China Standard Time.
IST to CST time conversion table
IST to CST on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| IST | CST | Day |
|---|---|---|
| 12:00 AM IST | 12:30 PM CST | previous day |
| 1:00 AM IST | 1:30 PM CST | previous day |
| 2:00 AM IST | 2:30 PM CST | previous day |
| 3:00 AM IST | 3:30 PM CST | previous day |
| 4:00 AM IST | 4:30 PM CST | previous day |
| 5:00 AM IST | 5:30 PM CST | previous day |
| 6:00 AM IST | 6:30 PM CST | previous day |
| 7:00 AM IST | 7:30 PM CST | previous day |
| 8:00 AM IST | 8:30 PM CST | previous day |
| 9:00 AM IST | 9:30 PM CST | previous day |
| 10:00 AM IST | 10:30 PM CST | previous day |
| 11:00 AM IST | 11:30 PM CST | previous day |
| 12:00 PM IST | 12:30 AM CST | night |
| 1:00 PM IST | 1:30 AM CST | night |
| 2:00 PM IST | 2:30 AM CST | night |
| 3:00 PM IST | 3:30 AM CST | night |
| 4:00 PM IST | 4:30 AM CST | night |
| 5:00 PM IST | 5:30 AM CST | night |
| 6:00 PM IST | 6:30 AM CST | — |
| 7:00 PM IST | 7:30 AM CST | — |
| 8:00 PM IST | 8:30 AM CST | — |
| 9:00 PM IST | 9:30 AM CST | — |
| 10:00 PM IST | 10:30 AM CST | — |
| 11:00 PM IST | 11:30 AM CST | — |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert IST to CST
Subtract 11 hours 30 minutes from the IST time to get CST.
Example: 9:00 AM IST = 9:30 PM CST (previous day).
Across midnight: 1:00 AM IST = 1:30 PM CST (previous day). The date changes, so always check the day as well as the hour.
Time difference between IST and CST
The time difference between IST and CST is not the same all year, because the two sides change for daylight saving time on different dates. In 2026 it works out like this:
- 1 Jan 2026 – 7 Mar 2026: CST is 11 hours 30 minutes behind of IST.
- 8 Mar 2026 – 31 Oct 2026: CST is 10 hours 30 minutes behind of IST.
- 1 Nov 2026 – 31 Dec 2026: CST is 11 hours 30 minutes behind of IST.
IST and CST during daylight saving time
- IST does not observe daylight saving time; it stays on UTC+5:30 all year.
- CST next changes on 14 Mar 2027: clocks go forward one hour at 01:59 local time, from CST (UTC−6) to CDT (UTC−5).
Best time for a meeting between IST and CST
IST and CST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM IST, which is 7:30 PM CST.
IST to CST FAQ
What is the time difference between IST and CST?
Right now CST is 11 hours 30 minutes behind IST. The gap changes 3 times in 2026 because the two sides switch to daylight saving time on different dates.
What is 9 AM IST in CST?
9:00 AM IST is 9:30 PM CST (previous day).
What is 12 PM (noon) IST in CST?
12:00 PM IST is 12:30 AM CST.
Is CST ahead of or behind IST?
CST is 11 hours 30 minutes behind IST, so it is earlier in CST than in IST.
Does IST change for daylight saving time?
No. IST stays on the same offset all year, so conversions never shift for daylight saving time.
Does CST change for daylight saving time?
Yes. CST next changes on 14 Mar 2027, when clocks go forward one hour from CST to CDT.
What is the best time for a meeting between IST and CST?
IST and CST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM IST, which is 7:30 PM CST.
Is CT the same as CST?
CST is the winter (standard) name of Central Time (CT). From March to November the same clocks are called CDT. This converter always uses the one in force on the date you choose.
Related conversions
Convert CST to IST
Convert IST to other time zones
Convert other time zones to CST
IST to CST by hour
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.