IST to CST Converter

US Central Time is 11 h 30 min behind India — 10 h 30 min from March to November.

India Standard TimeNew Delhi · Mumbai

--:--

IST

—difference

Central TimeChicago

--:--

CST

Here CST means US Central Time (Chicago), not China Standard Time. India has no DST; Central switches to CDT (UTC−5) from March to November.

Convert IST to CT

IST time Date

— Central Time

Formula: CT = IST − 11:30 hours (IST→CST) or − 10:30 hours (IST→CDT).

Only the US side changes for daylight saving (in 2026: Mar 8 and Nov 1), so the gap shifts by 1 hour twice a year.

Working hours that overlap between New Delhi · Mumbai and Chicago:

Winter (IST / CST): no 9-to-5 overlap; best compromise (7 AM–9 PM both sides): 6:30 PM–9:00 PM IST = 7:00 AM–9:30 AM CT.
Summer (IST / CDT): no 9-to-5 overlap; best compromise (7 AM–9 PM both sides): 5:30 PM–9:00 PM IST = 7:00 AM–10:30 AM CT.

What is 9 PM IST in CST?

9:00 PM IST is 9:30 AM CST the same day. During US daylight time (CDT) it is 10:30 AM.

How far behind India is Chicago?

11 hours 30 minutes in winter and 10 hours 30 minutes from the second Sunday in March to the first Sunday in November.

Study smarter with Stuon

Turn what you learn into lasting knowledge with active recall, spaced repetition, and simple study tracking.

Continue on Stuon