IST to CST Converter
CST is 10 hours 30 minutes behind IST 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.
CST to IST insteadTime difference between IST and CST
CST is 10 hours 30 minutes behind IST for most of the year.
- 2026: CST is 11 hours 30 minutes behind IST from Jan 1 – Mar 7, 2026, Nov 1 – Dec 31, 2026.
- 2027: CST is 11 hours 30 minutes behind IST from Jan 1 – Mar 13, 2027, Nov 7 – Dec 31, 2027.
IST to CST conversion table
| IST | CSTMost of the year | CSTJan 1 – Mar 7, 2026, Nov 1 – Dec 31, 2026 |
|---|---|---|
| 12 AM | 1:30 PM−1 day | 12:30 PM−1 day |
| 1 AM | 2:30 PM−1 day | 1:30 PM−1 day |
| 2 AM | 3:30 PM−1 day | 2:30 PM−1 day |
| 3 AM | 4:30 PM−1 day | 3:30 PM−1 day |
| 4 AM | 5:30 PM−1 day | 4:30 PM−1 day |
| 5 AM | 6:30 PM−1 day | 5:30 PM−1 day |
| 6 AM | 7:30 PM−1 day | 6:30 PM−1 day |
| 7 AM | 8:30 PM−1 day | 7:30 PM−1 day |
| 8 AM | 9:30 PM−1 day | 8:30 PM−1 day |
| 9 AM | 10:30 PM−1 day | 9:30 PM−1 day |
| 10 AM | 11:30 PM−1 day | 10:30 PM−1 day |
| 11 AM | 12:30 AM | 11:30 PM−1 day |
| 12 PM | 1:30 AM | 12:30 AM |
| 1 PM | 2:30 AM | 1:30 AM |
| 2 PM | 3:30 AM | 2:30 AM |
| 3 PM | 4:30 AM | 3:30 AM |
| 4 PM | 5:30 AM | 4:30 AM |
| 5 PM | 6:30 AM | 5:30 AM |
| 6 PM | 7:30 AM | 6:30 AM |
| 7 PM | 8:30 AM | 7:30 AM |
| 8 PM | 9:30 AM | 8:30 AM |
| 9 PM | 10:30 AM | 9:30 AM |
| 10 PM | 11:30 AM | 10:30 AM |
| 11 PM | 12:30 PM | 11:30 AM |
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 5:30 PM – 9 PM IST (7 AM – 10:30 AM CST).
Frequently asked questions
What time is it in CST when it's 9 AM in IST?
10:30 PM the previous day for most of the year. CST is 10 hours 30 minutes behind IST.
How many hours is CST behind IST?
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: CST is 11 hours 30 minutes behind IST from Jan 1 – Mar 7, 2026, Nov 1 – Dec 31, 2026. 2027: CST is 11 hours 30 minutes behind IST from Jan 1 – Mar 13, 2027, Nov 7 – Dec 31, 2027.
Does IST use daylight saving time?
No. India Standard Time stays at UTC+5:30 all year.
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.
When is the best time to schedule a meeting between IST and CST?
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 5:30 PM – 9 PM IST (7 AM – 10:30 AM CST).
Which IST and CST does this page use?
IST here means India Standard Time (UTC+5:30), not Irish or Israel Standard Time. Here CST means US Central Time (UTC−6, CDT UTC−5 in summer), not China Standard Time. For China, see the Beijing pages.