IST to CST Time Converter

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

Mumbai · India Standard Time
02:25:27
Monday, May 11, 2026
GMT+5:30 · UTC+05:30
Chicago · Central Standard Time
15:55:27
Sunday, May 10, 2026
CDT · UTC-05:00

Convert a specific time

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

Daylight Saving status right now

IST (India Standard Time)
Observes DST
No
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

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 IST and CST meet?

00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
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18
19
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21
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23
IST
CST
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Mumbai (IST). Each row shows the local working-hours state in that zone for the same moment in time.
No business-hours overlap exists between IST and CST.
The two zones are too far apart for synchronous meetings during normal working hours. Plan async or schedule outside 9-5 on at least one side.

Hour-by-hour IST to CST conversion table

IST time (Mumbai)CST time (Chicago)Status
00:00 Mon13:30 SunCST working
01:00 Mon14:30 SunCST working
02:00 Mon15:30 SunCST working
03:00 Mon16:30 SunCST working
04:00 Mon17:30 SunOff-hours both sides
05:00 Mon18:30 SunOff-hours both sides
06:00 Mon19:30 SunOff-hours both sides
07:00 Mon20:30 SunOff-hours both sides
08:00 Mon21:30 SunOff-hours both sides
09:00 Mon22:30 SunIST working
10:00 Mon23:30 SunIST working
11:00 Mon00:30 MonIST working
12:00 Mon01:30 MonIST working
13:00 Mon02:30 MonIST working
14:00 Mon03:30 MonIST working
15:00 Mon04:30 MonIST working
16:00 Mon05:30 MonIST working
17:00 Mon06:30 MonOff-hours both sides
18:00 Mon07:30 MonOff-hours both sides
19:00 Mon08:30 MonOff-hours both sides
20:00 Mon09:30 MonCST working
21:00 Mon10:30 MonCST working
22:00 Mon11:30 MonCST working
23:00 Mon12:30 MonCST 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

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
Central Standard Time (CST)
IANA identifier
America/Chicago
Current UTC offset
UTC-05:00
Current abbreviation
CDT
Major cities in this zone
ChicagoHoustonDallasAustinNew Orleans

Sun today in Mumbai and Chicago

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

Related converters

CST to IST (reverse)IST to ESTIST to PSTIST to GMTIST to UTCIST to CETEST to CSTPST to CSTGMT to CSTUTC to CSTCET to CST
Looking for local time? See time in Mumbai or time in Chicago.

Frequently asked questions

What is the time difference between IST and CST right now?+
CST (Central Standard Time) is currently 10h 30m behind IST (India Standard Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does IST or CST observe daylight saving time?+
IST: does not observe daylight saving time. CST: observes daylight saving time.
When is the best time to schedule a meeting between IST and CST?+
IST and CST have no business-hour overlap, even at the edges of a typical workday. Async collaboration or non-9-5 scheduling is the practical choice.
What time is it in Chicago when it is 12:00 noon in Mumbai?+
When it is 12:00 Mon in Mumbai (IST), it is 01:30 Mon in Chicago (CST).
Which IANA time zone identifiers are used for IST and CST?+
IST maps to "Asia/Kolkata" in the IANA database. CST maps to "America/Chicago". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Mumbai ahead of or behind Chicago?+
Whether Mumbai (IST) is ahead of or behind Chicago (CST) depends on the current UTC offsets. Right now CST is 10h 30m behind IST. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for IST and CST?+
IST is UTC+05:30 (GMT+5:30) and CST is UTC-05:00 (CDT). 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 IST and CST?+
No standard business-hours overlap exists between IST and CST. Plan asynchronous work or schedule outside 9-5 on at least one side.