CST to IST Converter
IST is 11 hours and 30 minutes ahead of CST
CST to IST Conversion Table
Green rows indicate standard business hours (9 AM – 5 PM) in IST
| CST | IST |
|---|---|
| 12:00 AM | 11:30 AM |
| 1:00 AM | 12:30 PM |
| 2:00 AM | 1:30 PM |
| 3:00 AM | 2:30 PM |
| 4:00 AM | 3:30 PM |
| 5:00 AM | 4:30 PM |
| 6:00 AM | 5:30 PM |
| 7:00 AM | 6:30 PM |
| 8:00 AM | 7:30 PM |
| 9:00 AM | 8:30 PM |
| 10:00 AM | 9:30 PM |
| 11:00 AM | 10:30 PM |
| 12:00 PM | 11:30 PM |
| 1:00 PM | 12:30 AM +1d |
| 2:00 PM | 1:30 AM +1d |
| 3:00 PM | 2:30 AM +1d |
| 4:00 PM | 3:30 AM +1d |
| 5:00 PM | 4:30 AM +1d |
| 6:00 PM | 5:30 AM +1d |
| 7:00 PM | 6:30 AM +1d |
| 8:00 PM | 7:30 AM +1d |
| 9:00 PM | 8:30 AM +1d |
| 10:00 PM | 9:30 AM +1d |
| 11:00 PM | 10:30 AM +1d |
Converting Central Standard Time to India Standard Time
Central Standard Time (CST) and India Standard Time (IST) are separated by a 11 hours and 30 minutes time difference. IST is 11 hours and 30 minutes ahead of CST. CST is UTC-6, used in United States, Canada, Mexico, while IST is UTC+5:30, used in India, Sri Lanka.
When converting from CST to IST, the key reference points to remember are: 9:00 AM CST equals 8:30 PM IST, 12:00 PM noon CST equals 11:30 PM IST, and 5:00 PM CST equals 4:30 AM IST. The conversion table above shows every hour of the day mapped between these two time zones.
Scheduling Across CST and IST
For professionals scheduling meetings between CST and IST, 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
CST observes Daylight Saving Time, switching to CDT (UTC-5) during summer months. IST does not observe DST, staying at UTC+5:30 year-round. 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.