IST to CST Time Converter
IST is 11 hours 30 minutes ahead of CST right now.
IST UTC+5:30 · CST UTC−6
IST → CST at a glance
| IST | CST |
|---|---|
| 09:00 | 21:30 |
| 12:00 | 00:30 |
| 15:00 | 03:30 |
| 18:00 | 06:30 |
| 21:00 | 09:30 |
IST currently runs on UTC+5:30 and CST on UTC−6, so IST is 11 hours 30 minutes ahead of CST. IST does not observe daylight saving time, and CST is currently on standard time. Because both cities follow their own clock rules, the 11 hours 30 minutes gap you see today can shift by an hour around the spring and autumn changeovers, which is why this page calculates every value live from the official time zone database instead of a fixed offset. There is no hour today when both offices are inside normal 09:00–18:00 hours, so one side will need to join early or late. Use the planner above to drag across a range, compare more cities, then copy a summary or add the slot straight to Google Calendar.
Daylight saving in IST and CST
IST keeps the same offset all year, so any change in the gap comes from the other location. CST follows North American rules: clocks go forward on the second Sunday in March and back on the first Sunday in November.
Frequently asked questions
What is the time difference between IST and CST?
IST is 11 hours 30 minutes ahead of CST right now (IST UTC+5:30, CST UTC−6).
Does IST or CST use daylight saving time?
IST does not observe daylight saving time. CST is currently on standard time. The gap between them can change when either switches clocks.
What is 9 AM in IST in CST?
9:00 AM in IST is 21:30 in CST today.