IST to CST Converter
CST is 11 hours and 30 minutes behind IST
IST to CST Conversion Table
Green rows indicate standard business hours (9 AM – 5 PM) in CST
| IST | CST |
|---|---|
| 12:00 AM | 12:30 PM -1d |
| 1:00 AM | 1:30 PM -1d |
| 2:00 AM | 2:30 PM -1d |
| 3:00 AM | 3:30 PM -1d |
| 4:00 AM | 4:30 PM -1d |
| 5:00 AM | 5:30 PM -1d |
| 6:00 AM | 6:30 PM -1d |
| 7:00 AM | 7:30 PM -1d |
| 8:00 AM | 8:30 PM -1d |
| 9:00 AM | 9:30 PM -1d |
| 10:00 AM | 10:30 PM -1d |
| 11:00 AM | 11:30 PM -1d |
| 12:00 PM | 12:30 AM |
| 1:00 PM | 1:30 AM |
| 2:00 PM | 2:30 AM |
| 3:00 PM | 3:30 AM |
| 4:00 PM | 4:30 AM |
| 5:00 PM | 5:30 AM |
| 6:00 PM | 6:30 AM |
| 7:00 PM | 7:30 AM |
| 8:00 PM | 8:30 AM |
| 9:00 PM | 9:30 AM |
| 10:00 PM | 10:30 AM |
| 11:00 PM | 11:30 AM |
Converting India Standard Time to Central Standard Time
India Standard Time (IST) and Central Standard Time (CST) are separated by a 11 hours and 30 minutes time difference. CST is 11 hours and 30 minutes behind IST. IST is UTC+5:30, used in India, Sri Lanka, while CST is UTC-6, used in United States, Canada, Mexico.
When converting from IST to CST, the key reference points to remember are: 9:00 AM IST equals 9:30 PM CST, 12:00 PM noon IST equals 12:30 AM CST, and 5:00 PM IST equals 5:30 AM CST. The conversion table above shows every hour of the day mapped between these two time zones.
Scheduling Across IST and CST
For professionals scheduling meetings between IST and CST, finding overlapping business hours is essential. Standard business hours are typically 9:00 AM to 5:00 PM in each time zone. Given the 11 hours and 30 minutes difference, the window of overlap may be limited, making early morning or late evening calls necessary for one party. Use the highlighted working hours in the conversion table above to quickly identify suitable meeting times.
Daylight Saving Time Considerations
IST does not observe Daylight Saving Time, maintaining UTC+5:30 year-round. CST observes DST, switching to CDT (UTC-5). During DST transitions, the time difference between these zones may temporarily change by 1 hour. Always verify the current offset during spring and fall transition periods.