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Timezone Prime

CST to IST converter

Convert Central Time (CST/CDT) to India Standard Time (IST), with daylight saving applied for the exact date you pick.

From

Tue, Oct 27

To

Tue, Oct 27 Same day

CDT 9 to 5 IST 9 to 5

From zone
Central Daylight Time
Offset and clock
UTC−5 Daylight saving time
IANA name
America/Chicago
To zone
India Standard Time
Offset and clock
UTC+5:30 No daylight saving time
IANA name
Asia/Kolkata

IST is 10 hours 30 minutes ahead of CDT.

Time difference
IST is 10 hours 30 minutes ahead of CDT for most of the year (238 days in 2026). The gap is 11 hours 30 minutes for about 18 weeks in 2026.
Meeting window
Working days of 9 AM to 5 PM do not overlap. The least disruptive slot is around 6:00 AM CDT, which is 4:30 PM IST while CDT and IST apply.
Daylight saving
Central Time changes its clocks twice a year; India Standard Time does not.

The same conversion works for every city on these clocks, such as Chicago to India, Chicago to Delhi and Texas to India.

Where CST and IST apply

Shaded areas follow the official zone boundaries, so a country split across zones is split here too. Hover or tap a region for its local time.

  • Central Time
  • India Standard Time
  • Same UTC offset right now, different zone rules

Drag to pan. Ctrl and scroll, or pinch, to zoom. Boundaries: timezone-boundary-builder, © OpenStreetMap contributors

Hour by hour

Every hour of Tuesday, October 27, 2026, side by side. Days with a clock change show 23 or 25 rows.

Shaded rows fall inside working hours in both places.

Hourly comparison of the two time zones. Choose a time to load it in the converter.
Chicago (CDT) New Delhi (IST) Working hours
12:00 AM 10:30 AM
1:00 AM 11:30 AM
2:00 AM 12:30 PM
3:00 AM 1:30 PM
4:00 AM 2:30 PM
5:00 AM 3:30 PM
6:00 AM 4:30 PM
7:00 AM 5:30 PM
8:00 AM 6:30 PM
9:00 AM 7:30 PM
10:00 AM 8:30 PM
11:00 AM 9:30 PM
12:00 PM 10:30 PM
1:00 PM 11:30 PM
2:00 PM 12:30 AM next day
3:00 PM 1:30 AM next day
4:00 PM 2:30 AM next day
5:00 PM 3:30 AM next day
6:00 PM 4:30 AM next day
7:00 PM 5:30 AM next day
8:00 PM 6:30 AM next day
9:00 PM 7:30 AM next day
10:00 PM 8:30 AM next day
11:00 PM 9:30 AM next day

CST to IST conversion table

Every hour of the Central Time day, plus the common half hours, and their IST equivalents. The second column covers the part of the year when the clocks are on a different gap.

CST to IST conversion table
Central Time IST 10 h 30 min ahead, most of the year (238 days in 2026) IST 11 h 30 min ahead, about 18 weeks in 2026
12:00 AM 10:30 AM11:30 AM
1:00 AM 11:30 AM12:30 PM
2:00 AM 12:30 PM1:30 PM
3:00 AM 1:30 PM2:30 PM
4:00 AM 2:30 PM3:30 PM
5:00 AM 3:30 PM4:30 PM
6:00 AM 4:30 PM5:30 PM
7:00 AM 5:30 PM6:30 PM
8:00 AM 6:30 PM7:30 PM
9:00 AM 7:30 PM8:30 PM
9:30 AM 8:00 PM9:00 PM
10:00 AM 8:30 PM9:30 PM
10:30 AM 9:00 PM10:00 PM
11:00 AM 9:30 PM10:30 PM
11:30 AM 10:00 PM11:00 PM
12:00 PM 10:30 PM11:30 PM
12:30 PM 11:00 PM12:00 AM (next day)
1:00 PM 11:30 PM12:30 AM (next day)
1:30 PM 12:00 AM (next day)1:00 AM (next day)
2:00 PM 12:30 AM (next day)1:30 AM (next day)
2:30 PM 1:00 AM (next day)2:00 AM (next day)
3:00 PM 1:30 AM (next day)2:30 AM (next day)
3:30 PM 2:00 AM (next day)3:00 AM (next day)
4:00 PM 2:30 AM (next day)3:30 AM (next day)
4:30 PM 3:00 AM (next day)4:00 AM (next day)
5:00 PM 3:30 AM (next day)4:30 AM (next day)
5:30 PM 4:00 AM (next day)5:00 AM (next day)
6:00 PM 4:30 AM (next day)5:30 AM (next day)
7:00 PM 5:30 AM (next day)6:30 AM (next day)
8:00 PM 6:30 AM (next day)7:30 AM (next day)
9:00 PM 7:30 AM (next day)8:30 AM (next day)
10:00 PM 8:30 AM (next day)9:30 AM (next day)
11:00 PM 9:30 AM (next day)10:30 AM (next day)

How the gap changes in 2026 and 2027

Each row is a stretch of days with one constant difference, split at every clock change.

Time difference periods between CST and IST
Dates CST IST Difference
Thu, Jan 1, 2026 until Sun, Mar 8, 2026 CST IST IST 11 h 30 min ahead
Sun, Mar 8, 2026 until Sun, Nov 1, 2026 CDT IST IST 10 h 30 min ahead
Sun, Nov 1, 2026 until Sun, Mar 14, 2027 CST IST IST 11 h 30 min ahead
Sun, Mar 14, 2027 until Sun, Nov 7, 2027 CDT IST IST 10 h 30 min ahead
Sun, Nov 7, 2027 until Sat, Jan 1, 2028 CST IST IST 11 h 30 min ahead

Upcoming clock changes

  1. Central Time Sunday, November 1, 2026: at 2:00 AM clocks go back 1 hour to 1:00 AM
  2. Central Time Sunday, March 14, 2027: at 2:00 AM clocks go forward 1 hour to 3:00 AM
  3. Central Time Sunday, November 7, 2027: at 2:00 AM clocks go back 1 hour to 1:00 AM
  4. Central Time Sunday, March 12, 2028: at 2:00 AM clocks go forward 1 hour to 3:00 AM

About the two zones

Central Time (CST / CDT)

Central Time follows the clock in Chicago: Central Standard Time (CST, UTC−6) in winter and Central Daylight Time (CDT, UTC−5) during US daylight saving time.

IANA zone
America/Chicago
Offset
UTC−6 standard, UTC−5 daylight saving
Used in
the central United States and parts of Canada
Major cities
Chicago, Houston, Dallas, Minneapolis, Winnipeg, New Orleans

CST is also used for China Standard Time (UTC+8) and Cuba Standard Time. Here CST means US Central Time (America/Chicago).

India Standard Time (IST)

India Standard Time is UTC+5:30 all year. The whole country keeps a single clock, and India has not observed daylight saving time since the 1940s, so IST never changes.

IANA zone
Asia/Kolkata
Offset
UTC+5:30 all year
Used in
India
Major cities
Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata

IST can also stand for Irish Standard Time or Israel Standard Time. On this site IST always means India Standard Time (Asia/Kolkata).

CST and IST, answered

What is the time difference between CST and IST?

IST is 10 hours 30 minutes ahead of CDT for most of the year (238 days in 2026). The gap is 11 hours 30 minutes for about 18 weeks in 2026.

How do I work out the time in India from CST?

India uses India Standard Time. IST is 10 hours 30 minutes ahead of CDT for most of the year (238 days in 2026). The gap is 11 hours 30 minutes for about 18 weeks in 2026. Type any CST time into the CST to IST converter to see the India time for any date.

What is 9:00 AM CST in IST?

9:00 AM CDT is 7:30 PM IST for most of the year (238 days in 2026). 9:00 AM CST is 8:30 PM IST for about 18 weeks in 2026.

What is 12:00 PM CST in IST?

12:00 PM CDT is 10:30 PM IST for most of the year (238 days in 2026). 12:00 PM CST is 11:30 PM IST for about 18 weeks in 2026.

What is 10:00 AM CST in IST?

10:00 AM CDT is 8:30 PM IST for most of the year (238 days in 2026). 10:00 AM CST is 9:30 PM IST for about 18 weeks in 2026.

What is 5:00 PM CST in IST?

5:00 PM CDT is 3:30 AM (next day) IST for most of the year (238 days in 2026). 5:00 PM CST is 4:30 AM (next day) IST for about 18 weeks in 2026.

Is IST ahead of CST, and by how many hours?

Yes. IST is 10 hours 30 minutes ahead of CDT for most of the year (238 days in 2026). The gap is 11 hours 30 minutes for about 18 weeks in 2026.

What is a good meeting time for CST and IST?

Working days of 9 AM to 5 PM do not overlap. The least disruptive slot is around 6:00 AM CDT, which is 4:30 PM IST while CDT and IST apply.

Does daylight saving time affect CST to IST?

Central Time changes its clocks twice a year; India Standard Time does not. The next change is on Sunday, November 1, 2026 in Central Time.

Which CST does the CST to IST converter use?

CST is also used for China Standard Time (UTC+8) and Cuba Standard Time. Here CST means US Central Time (America/Chicago).

Which IST does the CST to IST converter use?

IST can also stand for Irish Standard Time or Israel Standard Time. On this site IST always means India Standard Time (Asia/Kolkata).

Related conversions

From Central Time

To India Standard Time