CST to IST Converter
IST is 10 hours 30 minutes ahead of CST for most of the year. The gap changes for a few weeks a year because the two places switch to daylight saving time on different dates.
IST to CST insteadTime difference between CST and IST
IST is 10 hours 30 minutes ahead of CST for most of the year.
- 2026: IST is 11 hours 30 minutes ahead of CST from Jan 1 – Mar 7, 2026, Nov 1 – Dec 31, 2026.
- 2027: IST is 11 hours 30 minutes ahead of CST from Jan 1 – Mar 13, 2027, Nov 7 – Dec 31, 2027.
CST to IST conversion table
| CST | ISTMost of the year | ISTJan 1 – Mar 7, 2026, Nov 1 – Dec 31, 2026 |
|---|---|---|
| 12 AM | 10:30 AM | 11:30 AM |
| 1 AM | 11:30 AM | 12:30 PM |
| 2 AM | 12:30 PM | 1:30 PM |
| 3 AM | 1:30 PM | 2:30 PM |
| 4 AM | 2:30 PM | 3:30 PM |
| 5 AM | 3:30 PM | 4:30 PM |
| 6 AM | 4:30 PM | 5:30 PM |
| 7 AM | 5:30 PM | 6:30 PM |
| 8 AM | 6:30 PM | 7:30 PM |
| 9 AM | 7:30 PM | 8:30 PM |
| 10 AM | 8:30 PM | 9:30 PM |
| 11 AM | 9:30 PM | 10:30 PM |
| 12 PM | 10:30 PM | 11:30 PM |
| 1 PM | 11:30 PM | 12:30 AM+1 day |
| 2 PM | 12:30 AM+1 day | 1:30 AM+1 day |
| 3 PM | 1:30 AM+1 day | 2:30 AM+1 day |
| 4 PM | 2:30 AM+1 day | 3:30 AM+1 day |
| 5 PM | 3:30 AM+1 day | 4:30 AM+1 day |
| 6 PM | 4:30 AM+1 day | 5:30 AM+1 day |
| 7 PM | 5:30 AM+1 day | 6:30 AM+1 day |
| 8 PM | 6:30 AM+1 day | 7:30 AM+1 day |
| 9 PM | 7:30 AM+1 day | 8:30 AM+1 day |
| 10 PM | 8:30 AM+1 day | 9:30 AM+1 day |
| 11 PM | 9:30 AM+1 day | 10:30 AM+1 day |
Best time to meet
A regular 9 AM – 5 PM day doesn't overlap. If one side starts early or stays late (7 AM – 9 PM), you can meet 7 AM – 10:30 AM CST (5:30 PM – 9 PM IST).
Frequently asked questions
What time is it in IST when it's 9 AM in CST?
7:30 PM for most of the year. IST is 10 hours 30 minutes ahead of CST.
How many hours is IST ahead of CST?
Usually 10 hours 30 minutes. The gap changes for a few weeks a year because daylight saving time starts and ends on different dates: 2026: IST is 11 hours 30 minutes ahead of CST from Jan 1 – Mar 7, 2026, Nov 1 – Dec 31, 2026. 2027: IST is 11 hours 30 minutes ahead of CST from Jan 1 – Mar 13, 2027, Nov 7 – Dec 31, 2027.
Does CST use daylight saving time?
Yes. Central Time is UTC−6 (CST) in January and UTC−5 (CDT) in July. Mar 8, 2026: clocks go forward to UTC−5; Nov 1, 2026: clocks go back to UTC−6.
Does IST use daylight saving time?
No. India Standard Time stays at UTC+5:30 all year.
When is the best time to schedule a meeting between CST and IST?
A regular 9 AM – 5 PM day doesn't overlap. If one side starts early or stays late (7 AM – 9 PM), you can meet 7 AM – 10:30 AM CST (5:30 PM – 9 PM IST).
Which CST and IST does this page use?
Here CST means US Central Time (UTC−6, CDT UTC−5 in summer), not China Standard Time. For China, see the Beijing pages. IST here means India Standard Time (UTC+5:30), not Irish or Israel Standard Time.