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CST to IST Converter

India Standard Time is 11 hours 30 minutes ahead of Central Time in winter and 10 hours 30 minutes ahead of during daylight saving time: to convert CST to IST, add 11 hours 30 minutes (or add 10 hours 30 minutes in summer). Live clocks for both zones are below, then a converter for any date and time, the full 24-hour chart and the best hours for a call.

Now in Central Time · Chicago

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Now in India Standard Time · Mumbai

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Central Time (CST/CDT)

India Standard Time (IST)

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CST to IST conversion chart

Standard time (January) — IST is 11 hours 30 minutes ahead of CST/CDT
CSTISTCSTIST
12:00 AM11:30 AM12:00 PM11:30 PM
1:00 AM12:30 PM1:00 PM12:30 AM (next day)
2:00 AM1:30 PM2:00 PM1:30 AM (next day)
3:00 AM2:30 PM3:00 PM2:30 AM (next day)
4:00 AM3:30 PM4:00 PM3:30 AM (next day)
5:00 AM4:30 PM5:00 PM4:30 AM (next day)
6:00 AM5:30 PM6:00 PM5:30 AM (next day)
7:00 AM6:30 PM7:00 PM6:30 AM (next day)
8:00 AM7:30 PM8:00 PM7:30 AM (next day)
9:00 AM8:30 PM9:00 PM8:30 AM (next day)
10:00 AM9:30 PM10:00 PM9:30 AM (next day)
11:00 AM10:30 PM11:00 PM10:30 AM (next day)
Daylight saving time (July) — IST is 10 hours 30 minutes ahead of CST/CDT
CSTISTCSTIST
12:00 AM10:30 AM12:00 PM10:30 PM
1:00 AM11:30 AM1:00 PM11:30 PM
2:00 AM12:30 PM2:00 PM12:30 AM (next day)
3:00 AM1:30 PM3:00 PM1:30 AM (next day)
4:00 AM2:30 PM4:00 PM2:30 AM (next day)
5:00 AM3:30 PM5:00 PM3:30 AM (next day)
6:00 AM4:30 PM6:00 PM4:30 AM (next day)
7:00 AM5:30 PM7:00 PM5:30 AM (next day)
8:00 AM6:30 PM8:00 PM6:30 AM (next day)
9:00 AM7:30 PM9:00 PM7:30 AM (next day)
10:00 AM8:30 PM10:00 PM8:30 AM (next day)
11:00 AM9:30 PM11:00 PM9:30 AM (next day)

Daylight saving time and the CST–IST gap

Central Time (CST/CDT) — US daylight saving time runs from the second Sunday in March to the first Sunday in November (clocks forward at 2:00 AM). UTC offset in January: UTC−6; in July: UTC−5.

India Standard Time (IST) — IST does not observe daylight saving time, so its UTC offset is the same all year. UTC offset in January: UTC+5:30; in July: UTC+5:30.

Because the two zones switch on different dates (or only one of them switches), the gap changes twice a year. The converter above uses the exact switch dates for the date you enter, so it is always right — including the odd weeks in March/April and October/November.

Other time zone conversions

IST to CSTEST to CSTCST to ESTPST to CSTCST to PSTEST to ISTIST to ESTPST to ISTIST to PSTAny zone → any zone

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