TimezoneToolbox

CST to IST converter

IST is usually 10 h 30 min ahead of CST. It is 11 h 30 min ahead of CST 1 Jan–8 Mar and 1 Nov–31 Dec 2026, because of daylight saving time.

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CST to IST table

For 5 July 2026, when IST is 10 h 30 min ahead of CST. Other dates: see the table on the right.

CSTIST24-hour
12:00 AM10:30 AM 0:00 → 10:30
1:00 AM11:30 AM 1:00 → 11:30
2:00 AM12:30 PM 2:00 → 12:30
3:00 AM1:30 PM 3:00 → 13:30
4:00 AM2:30 PM 4:00 → 14:30
5:00 AM3:30 PM 5:00 → 15:30
6:00 AM4:30 PM 6:00 → 16:30
7:00 AM5:30 PM 7:00 → 17:30
8:00 AM6:30 PM 8:00 → 18:30
9:00 AM7:30 PM 9:00 → 19:30
10:00 AM8:30 PM 10:00 → 20:30
11:00 AM9:30 PM 11:00 → 21:30
12:00 PM10:30 PM 12:00 → 22:30
1:00 PM11:30 PM 13:00 → 23:30
2:00 PM12:30 AM next day14:00 → 0:30
3:00 PM1:30 AM next day15:00 → 1:30
4:00 PM2:30 AM next day16:00 → 2:30
5:00 PM3:30 AM next day17:00 → 3:30
6:00 PM4:30 AM next day18:00 → 4:30
7:00 PM5:30 AM next day19:00 → 5:30
8:00 PM6:30 AM next day20:00 → 6:30
9:00 PM7:30 AM next day21:00 → 7:30
10:00 PM8:30 AM next day22:00 → 8:30
11:00 PM9:30 AM next day23:00 → 9:30

When the difference changes

Computed from the IANA tz database (release 2026c). Governments can change these rules; the live converter uses your browser’s own copy of the database.

2026: from (UTC)until (UTC)IST vs CST
1 January 20268 March 202611 h 30 min ahead of
8 March 20261 November 202610 h 30 min ahead of
1 November 202631 December 202611 h 30 min ahead of
2027: from (UTC)until (UTC)IST vs CST
1 January 202714 March 202711 h 30 min ahead of
14 March 20277 November 202710 h 30 min ahead of
7 November 202731 December 202711 h 30 min ahead of

CST: Central Time · CST time now
CST is also used for China Standard Time (UTC+8) and Cuba Standard Time. This page means US Central Time (America/Chicago), which switches to CDT (UTC−5) in summer.

IST: India Standard Time · IST time now
IST can also mean Irish Standard Time or Israel Standard Time. This page means India (Asia/Kolkata), which has one zone and no daylight saving time.

Related converters

Questions

What is the time difference between CST and IST?

IST is usually 10 h 30 min ahead of CST. It is 11 h 30 min ahead of CST 1 Jan–8 Mar and 1 Nov–31 Dec 2026, because of daylight saving time.

What is 9 am CST in IST?

9:00 am CST is 7:30 PM IST, on dates when the usual difference applies. Use the converter above for any specific date.

Which CST does this page use?

CST is also used for China Standard Time (UTC+8) and Cuba Standard Time. This page means US Central Time (America/Chicago), which switches to CDT (UTC−5) in summer.

Which IST does this page use?

IST can also mean Irish Standard Time or Israel Standard Time. This page means India (Asia/Kolkata), which has one zone and no daylight saving time.