India Standard Time is 10 hours 30 minutes ahead of Central 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 CDT = 10:30 PM IST at the moment. (Central Time is on CDT for daylight saving time right now.)
CST to IST conversion table
| CST | IST when CST is CDT | IST when CST is CST |
|---|---|---|
| 12:00 AM | 10:30 AM | 11:30 AM |
| 1:00 AM | 11:30 AM | 12:30 PM |
| 2:00 AM | 12:30 PM | 1:30 PM |
| 3:00 AM | 1:30 PM | 2:30 PM |
| 4:00 AM | 2:30 PM | 3:30 PM |
| 5:00 AM | 3:30 PM | 4:30 PM |
| 6:00 AM | 4:30 PM | 5:30 PM |
| 7:00 AM | 5:30 PM | 6:30 PM |
| 8:00 AM | 6:30 PM | 7:30 PM |
| 9:00 AM | 7:30 PM | 8:30 PM |
| 10:00 AM | 8:30 PM | 9:30 PM |
| 11:00 AM | 9:30 PM | 10:30 PM |
| 12:00 PM | 10:30 PM | 11:30 PM |
| 1:00 PM | 11:30 PM | 12:30 AM +1 day |
| 2:00 PM | 12:30 AM +1 day | 1:30 AM +1 day |
| 3:00 PM | 1:30 AM +1 day | 2:30 AM +1 day |
| 4:00 PM | 2:30 AM +1 day | 3:30 AM +1 day |
| 5:00 PM | 3:30 AM +1 day | 4:30 AM +1 day |
| 6:00 PM | 4:30 AM +1 day | 5:30 AM +1 day |
| 7:00 PM | 5:30 AM +1 day | 6:30 AM +1 day |
| 8:00 PM | 6:30 AM +1 day | 7:30 AM +1 day |
| 9:00 PM | 7:30 AM +1 day | 8:30 AM +1 day |
| 10:00 PM | 8:30 AM +1 day | 9:30 AM +1 day |
| 11:00 PM | 9:30 AM +1 day | 10:30 AM +1 day |
CST and IST difference through 2027
The gap between the two zones on each date range, including daylight saving time changes:
| Dates | Central Time | India Standard Time | Difference |
|---|---|---|---|
| Sep 30, 2026 – Oct 31, 2026 | CDT (UTC−5) | IST (UTC+5:30) | IST 10 hours 30 minutes ahead |
| Nov 1, 2026 – Mar 13, 2027 | CST (UTC−6) | IST (UTC+5:30) | IST 11 hours 30 minutes ahead |
| Mar 14, 2027 – Nov 6, 2027 | CDT (UTC−5) | IST (UTC+5:30) | IST 10 hours 30 minutes ahead |
| Nov 7, 2027 – Dec 31, 2027 | CST (UTC−6) | IST (UTC+5:30) | IST 11 hours 30 minutes ahead |
Best time to meet or call
- When IST is 10 hours 30 minutes ahead of CST: Standard 9 AM–5 PM working hours don't overlap. The best compromise is usually early morning in Central Time (8:00 AM–9:00 AM), which is 6:30 PM–7:30 PM in India Standard Time.
- When IST is 11 hours 30 minutes ahead of CST: Standard 9 AM–5 PM working hours don't overlap. The best compromise is usually early morning in Central Time (8:00 AM–9:00 AM), which is 7:30 PM–8:30 PM in India Standard Time.
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.
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.
Frequently asked questions
What time is 12 PM CST in IST?
12:00 PM CDT is 10:30 PM IST 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 IST from CST?
Currently 10 hours 30 minutes ahead of CST. During the year the difference is 10 hours 30 minutes ahead of CST or 11 hours 30 minutes ahead of CST, depending on daylight saving time. See the table on this page for exact dates.
Does CST change for daylight saving time?
Yes. Central Time uses CST (UTC−6) in winter and CDT (UTC−5) during daylight saving time.
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.
What is the best time for a call between CST and IST?
Working hours don't overlap. Early morning in Central Time or evening in India Standard Time usually works best.
Is it CST or CDT right now?
Central Time uses CST in winter and CDT from the second Sunday in March to the first Sunday in November. The live clock on this page shows which one applies today.
More time zone conversions
- IST to CST (reverse)
- CST to EST
- CST to PST
- CST to MST
- EST to IST
- PST to IST
- GMT to IST
- UTC to IST
- GST to IST
- 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.