IST to CST converter
When it's 9:00 am in New Delhi, it's 10:30 pm the day before in Chicago (9:30 pm the day before from November to March). Your working days don't overlap at all, so someone starts early or stays late for every call.
Convert India Standard Time (IST) to Central Standard Time (CST) for any date and time.
Central Time is 10 hours 30 minutes behind India Standard Time from March to November, and 11 hours 30 minutes behind the rest of the year.
Right now IST is UTC+5:30 and Central Time is on CDT (UTC−5). Central Time switches back to standard time on 1 November 2026.
US clocks go back on 1 November 2026. From then, CST is 11 hours 30 minutes behind IST.
9:00 am to 5:00 pm IST is 10:30 pm CDT the day before to 6:30 am CDT.
- 8:00 am IST is 9:30 pm CDT the day before
- 9:00 am IST is 10:30 pm CDT the day before
- 10:00 am IST is 11:30 pm CDT the day before
- 12:00 pm IST is 1:30 am CDT
- 3:00 pm IST is 4:30 am CDT
- 5:00 pm IST is 6:30 am CDT
Hours in India Standard Time, Fri, Oct 23
India Standard Time
India
Fri, Oct 23
IST · UTC+5:30ReferenceWorking hoursCentral Time
US, Canada & Mexico
Fri, Oct 23
CDT · UTC−5−10h 30m from India Standard TimeOutside working 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
IST to CST conversion table
Every hour of the day in IST, converted to CDT. Shaded cells are working hours (9:00 am to 5:00 pm); green rows are working hours in both zones.
| IST | CDTUntil 1 November 2026; From 14 March 2027 | CST1 November 2026 to 14 March 2027 |
|---|---|---|
| 12:00 am IST | 1:30 pm CDT(day before) | 12:30 pm CST(day before) |
| 1:00 am IST | 2:30 pm CDT(day before) | 1:30 pm CST(day before) |
| 2:00 am IST | 3:30 pm CDT(day before) | 2:30 pm CST(day before) |
| 3:00 am IST | 4:30 pm CDT(day before) | 3:30 pm CST(day before) |
| 4:00 am IST | 5:30 pm CDT(day before) | 4:30 pm CST(day before) |
| 5:00 am IST | 6:30 pm CDT(day before) | 5:30 pm CST(day before) |
| 6:00 am IST | 7:30 pm CDT(day before) | 6:30 pm CST(day before) |
| 7:00 am IST | 8:30 pm CDT(day before) | 7:30 pm CST(day before) |
| 8:00 am IST | 9:30 pm CDT(day before) | 8:30 pm CST(day before) |
| 9:00 am IST | 10:30 pm CDT(day before) | 9:30 pm CST(day before) |
| 10:00 am IST | 11:30 pm CDT(day before) | 10:30 pm CST(day before) |
| 11:00 am IST | 12:30 am CDT | 11:30 pm CST(day before) |
| 12:00 pm IST | 1:30 am CDT | 12:30 am CST |
| 1:00 pm IST | 2:30 am CDT | 1:30 am CST |
| 2:00 pm IST | 3:30 am CDT | 2:30 am CST |
| 3:00 pm IST | 4:30 am CDT | 3:30 am CST |
| 4:00 pm IST | 5:30 am CDT | 4:30 am CST |
| 5:00 pm IST | 6:30 am CDT | 5:30 am CST |
| 6:00 pm IST | 7:30 am CDT | 6:30 am CST |
| 7:00 pm IST | 8:30 am CDT | 7:30 am CST |
| 8:00 pm IST | 9:30 am CDT | 8:30 am CST |
| 9:00 pm IST | 10:30 am CDT | 9:30 am CST |
| 10:00 pm IST | 11:30 am CDT | 10:30 am CST |
| 11:00 pm IST | 12:30 pm CDT | 11:30 am CST |
Best times to meet
A 9-to-5 working day in IST and one in CDT don't overlap. The closest fit is 4:00 pm IST (5:30 am CDT), when one of you starts early or stays late.
About these time zones
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.
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.
How the difference changes
Right now CDT is 10 hours 30 minutes behind IST. 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.