Central Time is 10 hours 30 minutes behind India Standard Time right now (until Oct 31, 2026); the gap changes to 11 hours 30 minutes when clocks change for daylight saving time. So 12:00 PM IST = 1:30 AM CDT at the moment. (Central Time is on CDT for daylight saving time right now.)
IST to CST conversion table
| IST | CDT when IST is IST | CST when IST is IST |
|---|---|---|
| 12:00 AM | 1:30 PM −1 day | 12:30 PM −1 day |
| 1:00 AM | 2:30 PM −1 day | 1:30 PM −1 day |
| 2:00 AM | 3:30 PM −1 day | 2:30 PM −1 day |
| 3:00 AM | 4:30 PM −1 day | 3:30 PM −1 day |
| 4:00 AM | 5:30 PM −1 day | 4:30 PM −1 day |
| 5:00 AM | 6:30 PM −1 day | 5:30 PM −1 day |
| 6:00 AM | 7:30 PM −1 day | 6:30 PM −1 day |
| 7:00 AM | 8:30 PM −1 day | 7:30 PM −1 day |
| 8:00 AM | 9:30 PM −1 day | 8:30 PM −1 day |
| 9:00 AM | 10:30 PM −1 day | 9:30 PM −1 day |
| 10:00 AM | 11:30 PM −1 day | 10:30 PM −1 day |
| 11:00 AM | 12:30 AM | 11:30 PM −1 day |
| 12:00 PM | 1:30 AM | 12:30 AM |
| 1:00 PM | 2:30 AM | 1:30 AM |
| 2:00 PM | 3:30 AM | 2:30 AM |
| 3:00 PM | 4:30 AM | 3:30 AM |
| 4:00 PM | 5:30 AM | 4:30 AM |
| 5:00 PM | 6:30 AM | 5:30 AM |
| 6:00 PM | 7:30 AM | 6:30 AM |
| 7:00 PM | 8:30 AM | 7:30 AM |
| 8:00 PM | 9:30 AM | 8:30 AM |
| 9:00 PM | 10:30 AM | 9:30 AM |
| 10:00 PM | 11:30 AM | 10:30 AM |
| 11:00 PM | 12:30 PM | 11:30 AM |
IST and CST difference through 2027
The gap between the two zones on each date range, including daylight saving time changes:
| Dates | India Standard Time | Central Time | Difference |
|---|---|---|---|
| Sep 30, 2026 – Oct 31, 2026 | IST (UTC+5:30) | CDT (UTC−5) | CST 10 hours 30 minutes behind |
| Nov 1, 2026 – Mar 13, 2027 | IST (UTC+5:30) | CST (UTC−6) | CST 11 hours 30 minutes behind |
| Mar 14, 2027 – Nov 6, 2027 | IST (UTC+5:30) | CDT (UTC−5) | CST 10 hours 30 minutes behind |
| Nov 7, 2027 – Dec 31, 2027 | IST (UTC+5:30) | CST (UTC−6) | CST 11 hours 30 minutes behind |
Best time to meet or call
- When CST is 10 hours 30 minutes behind IST: Standard 9 AM–5 PM working hours don't overlap. The best compromise is usually early morning in India Standard Time (8:00 AM–9:00 AM), which is 9:30 PM–10:30 PM in Central Time.
- When CST is 11 hours 30 minutes behind IST: Standard 9 AM–5 PM working hours don't overlap. The best compromise is usually early morning in India Standard Time (8:00 AM–9:00 AM), which is 8:30 PM–9:30 PM in Central Time.
About India Standard Time (IST)
India uses one time zone, IST (UTC+5:30), all year. India does not observe daylight saving time, so its difference from the US and UK changes when they change their clocks. It's used in all of India, including New Delhi, Mumbai, Bengaluru, Hyderabad, Chennai and Kolkata.
About Central Time (CST)
Central Time uses CST (UTC−6) in winter and CDT (UTC−5) during daylight saving time. It's used in Chicago, Houston, Dallas, San Antonio, New Orleans, Minneapolis and Winnipeg.
Frequently asked questions
What time is 12 PM IST in CST?
12:00 PM IST is 1:30 AM CDT right now (Sep 30, 2026 to Oct 31, 2026). The answer changes when either zone changes its clocks for daylight saving time.
How many hours ahead or behind is CST from IST?
Currently 10 hours 30 minutes behind IST. During the year the difference is 10 hours 30 minutes behind IST or 11 hours 30 minutes behind IST, depending on daylight saving time. See the table on this page for exact dates.
Does IST change for daylight saving time?
No. India uses one time zone, IST (UTC+5:30), all year. India does not observe daylight saving time, so its difference from the US and UK changes when they change their clocks.
Does CST change for daylight saving time?
Yes. Central Time uses CST (UTC−6) in winter and CDT (UTC−5) during daylight saving time.
What is the best time for a call between IST and CST?
Working hours don't overlap. Early morning in India Standard Time or evening in Central Time usually works best.
More time zone conversions
- CST to IST (reverse)
- EST to CST
- PST to CST
- MST to CST
- IST to EST
- IST to PST
- IST to GMT
- IST to UTC
- IST to GST
- All time zones
Sources
Reviewed by Gurmej Singh, Founder, Divy Digital Hub · Last reviewed: Wednesday, September 30, 2026. All calculations run in your browser. Editorial policy.