CST to IST Time Converter

Convert Central Standard Time (CST) to India Standard Time (IST). Both time zones are shown live below; current offset between them is 10h 30m ahead.

Chicago · Central Standard Time
15:55:25
Sunday, May 10, 2026
CDT · UTC-05:00
Mumbai · India Standard Time
02:25:25
Monday, May 11, 2026
GMT+5:30 · UTC+05:30

Convert a specific time

From: CST (Chicago)
To: IST (Mumbai)
--:--

Daylight Saving status right now

CST (Central Standard Time)
Observes DST
Yes
In DST right now
Yes
Next fall back
2026-11-01
Offset shift
UTC-05:00 → UTC-06:00
IST (India Standard Time)
Observes DST
No

Heads up: CST observes DST while IST does not. The 10.5-hour difference shown above will shift by one hour when CST starts or ends DST.

When can CST and IST meet?

00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
CST
IST
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Chicago (CST). Each row shows the local working-hours state in that zone for the same moment in time.
No overlap during strict 9-5 working hours; some flexibility needed.
If both sides are willing to extend to 8am-7pm, the available window is 08:00–08:00 CST (18:30–18:30 IST).

Hour-by-hour CST to IST conversion table

CST time (Chicago)IST time (Mumbai)Status
00:00 Sun10:30 SunIST working
01:00 Sun11:30 SunIST working
02:00 Sun12:30 SunIST working
03:00 Sun13:30 SunIST working
04:00 Sun14:30 SunIST working
05:00 Sun15:30 SunIST working
06:00 Sun16:30 SunIST working
07:00 Sun17:30 SunOff-hours both sides
08:00 Sun18:30 SunOff-hours both sides
09:00 Sun19:30 SunCST working
10:00 Sun20:30 SunCST working
11:00 Sun21:30 SunCST working
12:00 Sun22:30 SunCST working
13:00 Sun23:30 SunCST working
14:00 Sun00:30 MonCST working
15:00 Sun01:30 MonCST working
16:00 Sun02:30 MonCST working
17:00 Sun03:30 MonOff-hours both sides
18:00 Sun04:30 MonOff-hours both sides
19:00 Sun05:30 MonOff-hours both sides
20:00 Sun06:30 MonOff-hours both sides
21:00 Sun07:30 MonOff-hours both sides
22:00 Sun08:30 MonOff-hours both sides
23:00 Sun09:30 MonIST working

Times computed for today in each zone using the IANA time zone database. The conversion accounts for daylight saving time wherever applicable.

About these time zones

Central Standard Time (CST)
IANA identifier
America/Chicago
Current UTC offset
UTC-05:00
Current abbreviation
CDT
Major cities in this zone
ChicagoHoustonDallasAustinNew Orleans
India Standard Time (IST)
IANA identifier
Asia/Kolkata
Current UTC offset
UTC+05:30
Current abbreviation
GMT+5:30
Major cities in this zone
MumbaiNew DelhiBangaloreChennaiKolkata

Sun today in Chicago and Mumbai

Chicago
Sunrise
05:37
Sunset
19:59
Solar noon
12:48
Daylight
14h 22m
Mumbai
Sunrise
06:06
Sunset
19:05
Solar noon
12:36
Daylight
12h 58m

Related converters

IST to CST (reverse)CST to ESTCST to PSTCST to GMTCST to UTCCST to CETEST to ISTPST to ISTGMT to ISTUTC to ISTCET to IST
Looking for local time? See time in Chicago or time in Mumbai.

Frequently asked questions

What is the time difference between CST and IST right now?+
IST (India Standard Time) is currently 10h 30m ahead CST (Central Standard Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does CST or IST observe daylight saving time?+
CST: observes daylight saving time. IST: does not observe daylight saving time.
When is the best time to schedule a meeting between CST and IST?+
Standard 9-5 hours do not overlap. Extending to 8am-7pm gives a window of 08:00–08:00 CST (18:30–18:30 IST).
What time is it in Mumbai when it is 12:00 noon in Chicago?+
When it is 12:00 Sun in Chicago (CST), it is 22:30 Sun in Mumbai (IST).
Which IANA time zone identifiers are used for CST and IST?+
CST maps to "America/Chicago" in the IANA database. IST maps to "Asia/Kolkata". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Chicago ahead of or behind Mumbai?+
Whether Chicago (CST) is ahead of or behind Mumbai (IST) depends on the current UTC offsets. Right now IST is 10h 30m ahead CST. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for CST and IST?+
CST is UTC-05:00 (CDT) and IST is UTC+05:30 (GMT+5:30). Both offsets shift by one hour when the corresponding region enters or exits daylight saving time, so the live values on this page are the source of truth.
Can I schedule meetings during business hours for both CST and IST?+
Not during a strict 9am-5pm window. If both sides flex to 8am-7pm, the available meeting window between CST and IST is 08:00–08:00 CST.