CST to IST converter
When it's 9:00 am in Chicago, it's 7:30 pm in New Delhi (8:30 pm from November to March). Your working days don't overlap at all, so someone starts early or stays late for every call.
Convert Central Standard Time (CST) to India Standard Time (IST) for any date and time.
India Standard Time is 10 hours 30 minutes ahead of Central Time from March to November, and 11 hours 30 minutes ahead the rest of the year.
Right now Central Time is on CDT (UTC−5) and IST is UTC+5:30. Central Time switches back to standard time on 1 November 2026.
US clocks go back on 1 November 2026. From then, IST is 11 hours 30 minutes ahead of CST.
9:00 am to 5:00 pm CDT is 7:30 pm IST to 3:30 am IST the next day.
- 8:00 am CDT is 6:30 pm IST
- 9:00 am CDT is 7:30 pm IST
- 10:00 am CDT is 8:30 pm IST
- 12:00 pm CDT is 10:30 pm IST
- 3:00 pm CDT is 1:30 am IST the next day
- 5:00 pm CDT is 3:30 am IST the next day
Hours in Central Time, Fri, Oct 23
Central Time
US, Canada & Mexico
Fri, Oct 23
CDT · UTC−5ReferenceOutside working hoursIndia Standard Time
India
Fri, Oct 23
IST · UTC+5:30+10h 30m from Central TimeWorking hours
No shared working hours on Fri, Oct 23. Pick the slot closest to everyone's working day, or let each person pick from your availability.
Share a booking link insteadWorking hours: 9:00 AM–5:00 PM, Monday to FridayEveryone at work
CST to IST conversion table
Every hour of the day in CDT, converted to IST. Shaded cells are working hours (9:00 am to 5:00 pm); green rows are working hours in both zones.
| CDT / CST | IST (with CDT)Until 1 November 2026; From 14 March 2027 | IST (with CST)1 November 2026 to 14 March 2027 |
|---|---|---|
| 12:00 am | 10:30 am IST | 11:30 am IST |
| 1:00 am | 11:30 am IST | 12:30 pm IST |
| 2:00 am | 12:30 pm IST | 1:30 pm IST |
| 3:00 am | 1:30 pm IST | 2:30 pm IST |
| 4:00 am | 2:30 pm IST | 3:30 pm IST |
| 5:00 am | 3:30 pm IST | 4:30 pm IST |
| 6:00 am | 4:30 pm IST | 5:30 pm IST |
| 7:00 am | 5:30 pm IST | 6:30 pm IST |
| 8:00 am | 6:30 pm IST | 7:30 pm IST |
| 9:00 am | 7:30 pm IST | 8:30 pm IST |
| 10:00 am | 8:30 pm IST | 9:30 pm IST |
| 11:00 am | 9:30 pm IST | 10:30 pm IST |
| 12:00 pm | 10:30 pm IST | 11:30 pm IST |
| 1:00 pm | 11:30 pm IST | 12:30 am IST(next day) |
| 2:00 pm | 12:30 am IST(next day) | 1:30 am IST(next day) |
| 3:00 pm | 1:30 am IST(next day) | 2:30 am IST(next day) |
| 4:00 pm | 2:30 am IST(next day) | 3:30 am IST(next day) |
| 5:00 pm | 3:30 am IST(next day) | 4:30 am IST(next day) |
| 6:00 pm | 4:30 am IST(next day) | 5:30 am IST(next day) |
| 7:00 pm | 5:30 am IST(next day) | 6:30 am IST(next day) |
| 8:00 pm | 6:30 am IST(next day) | 7:30 am IST(next day) |
| 9:00 pm | 7:30 am IST(next day) | 8:30 am IST(next day) |
| 10:00 pm | 8:30 am IST(next day) | 9:30 am IST(next day) |
| 11:00 pm | 9:30 am IST(next day) | 10:30 am IST(next day) |
Best times to meet
A 9-to-5 working day in CDT and one in IST don't overlap. The closest fit is 9:00 am CDT (7:30 pm IST), when one of you starts early or stays late.
About these time zones
CST: Central Standard Time
Central Standard Time is UTC−6. CST is also used for China Standard Time (UTC+8) and Cuba Standard Time (UTC−5). This page converts North American Central Time.
Texas, Illinois, Minnesota, Louisiana and most of the Midwest and South, plus Manitoba in Canada. Saskatchewan and most of Mexico stay on CST all year. CT is the short form for the whole zone.
Most places on Central Time are on CDT (UTC−5) right now, not CST. People still say "CST" all year, so the times on this page follow the clocks and show CDT until 1 November 2026.
IST: India Standard Time
India Standard Time is UTC+5:30. IST is also used for Irish Standard Time (UTC+1, Ireland's summer time) and Israel Standard Time (UTC+2). This page converts India Standard Time.
All of India, with no daylight saving time. Sri Lanka uses the same offset.
How the difference changes
Right now IST is 10 hours 30 minutes ahead of CDT. From 1 November 2026, when US clocks go back, the difference becomes 11 hours 30 minutes. From 14 March 2027, when US clocks go forward, the difference becomes 10 hours 30 minutes.