Convert CST to IST for any date and time: IST is 11 hours 30 minutes ahead of CST in January and 10 hours 30 minutes ahead in July, because of daylight saving time. Daylight saving is handled automatically.
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Chicago, US Central (CST/CDT)19:21Mon 26 Oct 2026 · UTC−05:00
India (IST)05:51Tue 27 Oct 2026 (next day) · UTC+05:3010 hours 30 minutes ahead of CST
Meeting planner
Each row is the same moment. Green cells are working hours (9:00–17:00) in that place.
CST
IST
00:00
10:30
01:00
11:30
02:00
12:30
03:00
13:30
04:00
14:30
05:00
15:30
06:00
16:30
07:00
17:30
08:00
18:30
09:00
19:30
10:00
20:30
11:00
21:30
12:00
22:30
13:00
23:30
14:00
00:30+1
15:00
01:30+1
16:00
02:30+1
17:00
03:30+1
18:00
04:30+1
19:00
05:30+1
20:00
06:30+1
21:00
07:30+1
22:00
08:30+1
23:00
09:30+1
What is the time difference between CST and IST?
IST is 11 hours 30 minutes ahead of CST in January and 10 hours 30 minutes ahead in July, because of daylight saving time. For example, 9:00 AM CST is 8:30 PM IST in January. Pick any date and time above for the exact conversion, or use the meeting planner to find hours that suit both places.
The Time Zone Converter shows what a given date and time in one place is in other cities and time zones — PST, EST, GMT, CET, IST, PKT, GST, JST, AEST and every other zone in the IANA time zone database. It uses the official rules for the exact date you pick, so daylight saving changes are always handled.
Add up to six places to compare at once. The meeting planner lists all 24 hours of the day side by side and highlights 9:00–17:00 in each place, which makes it easy to find a call time that suits everyone across countries.
When to use it
Scheduling calls and meetings with clients or teammates abroad.
Remote and freelance work across time zones.
Calling family overseas at a reasonable hour.
Catching live events, webinars and launches announced in another time zone.
Tips for better results
Check meetings near late March and late October–early November: Europe and North America change their clocks on different dates.
Say the city, not the abbreviation, when sending an invitation — IST and CST each mean several places.
Use UTC for technical logs and deadlines that involve many countries.
How to use the Time Zone Converter
Pick the time zone and the date and time you want to convert (or press Use now).
Add up to six places to compare.
Read each local time and difference, and use the meeting planner to find hours that suit everyone.
Frequently asked questions
Does the CST to IST difference change during the year?
Yes. IST is 11 hours 30 minutes ahead of CST in January and 10 hours 30 minutes ahead in July, because of daylight saving time. The converter uses the rules for the exact date you choose.
How do I convert IST back to CST?
Choose India as the time zone and add CST, or open the reverse page from the list of conversions.
Does it handle daylight saving time?
Yes. Each conversion uses the official time zone rules for that exact date, so the result is right before and after clocks change — for example PST in winter and PDT in summer.
Why does IST or CST mean different places?
Abbreviations are shared: IST is India Standard Time but also Irish and Israel Standard Time, and CST is US Central or China Standard Time. Pick a city or region to be sure.
What is the time difference between PST and IST?
India (IST) is 13 hours 30 minutes ahead of US Pacific time in winter (PST) and 12 hours 30 minutes ahead in summer (PDT), because India does not use daylight saving time.
What is UTC?
Coordinated Universal Time is the world time standard that every zone is defined against — for example Pakistan is UTC+5 and New York is UTC−5 in winter.
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