Convert CT to IST

Central Time (CT) to India Standard Time (IST)

Tech companies in Chicago, Houston, and Dallas with development teams in India search this constantly. The 11.5-hour gap during Central Standard Time (10.5 hours during CDT) makes overlap windows narrow, so knowing the exact meeting sweet spot matters.

When it's 12:00 PM in Chicago, it's 10:30 PM in Mumbai

On Jan 1 – Mar 7, 2026; Nov 1, 2026 – Mar 13, 2027; Nov 7 – Dec 31, 2027: 11:30 PM in Mumbai.

CT UTC-6 / UTC-5 IST UTC+5:30 +10:30/+11:30h

Interactive Converter

Pick any time and date to convert between CT and IST.

CT to IST Conversion Table

Full 24-hour comparison. Business hours (9 AM -- 6 PM) are highlighted.

Chicago (CT)	Mumbai (IST)
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 +1 day
3:00 PM	1:30 AM +1 day
4:00 PM	2:30 AM +1 day
5:00 PM	3:30 AM +1 day
6:00 PM	4:30 AM +1 day
7:00 PM	5:30 AM +1 day
8:00 PM	6:30 AM +1 day
9:00 PM	7:30 AM +1 day
10:00 PM	8:30 AM +1 day
11:00 PM	9:30 AM +1 day

These times apply on all dates in 2026–2027 except:

Jan 1 – Mar 7, 2026; Nov 1, 2026 – Mar 13, 2027; Nov 7 – Dec 31, 2027: Mumbai times are 1 hour later.

Best Meeting Window

Top meeting times for teams in CT and IST (9 AM -- 6 PM work hours, 1-hour meeting).

12a

12p

Chicago

Mumbai

Overlap

Everyone available

Most available

Some overlap

Outside work hours

1 3:00 AM -- 4:00 AM in Chicago

Chicago: 3:00 AM Mumbai: 1:00 PM

1 of 2 members within working hours. 1 in mid-day range (9 AM–5 PM). Outside work hours for Chicago.

5.9 / 10

2 4:00 AM -- 5:00 AM in Chicago

Chicago: 4:00 AM Mumbai: 2:00 PM

1 of 2 members within working hours. 1 in mid-day range (9 AM–5 PM). Outside work hours for Chicago.

5.9 / 10

3 1:00 PM -- 2:00 PM in Chicago

Chicago: 1:00 PM Mumbai: 11:00 PM

1 of 2 members within working hours. 1 in mid-day range (9 AM–5 PM). Outside work hours for Mumbai.

5.9 / 10

These times apply on all dates in 2026–2027 except:

Jan 1 – Mar 7, 2026; Nov 1, 2026 – Mar 13, 2027; Nov 7 – Dec 31, 2027: Mumbai times are 1 hour later.

Try the Meeting Planner with custom work hours →

Scheduling Tips

Schedule meetings between 8:00-10:00 AM CST / 7:30-9:30 PM IST for the best overlap. Earlier US times push India past dinner.
During CDT (summer), you gain an extra hour of overlap. Use 7:00-10:00 AM CDT / 5:30-8:30 PM IST.
For async handoffs, post updates by 5:00 PM CST so the India team sees them at 4:30 AM IST when their day starts.

Time Difference & DST

The CT to IST gap is +10:30h or +11:30h, depending on daylight saving time. The table lists each period.

Dates	Chicago	Mumbai	Difference
Jan 1 – Mar 7, 2026	UTC-6	UTC+5:30	+11:30h
Mar 8 – Oct 31, 2026	UTC-5	UTC+5:30	+10:30h
Nov 1, 2026 – Mar 13, 2027	UTC-6	UTC+5:30	+11:30h
Mar 14 – Nov 6, 2027	UTC-5	UTC+5:30	+10:30h
Nov 7 – Dec 31, 2027	UTC-6	UTC+5:30	+11:30h

Mumbai does not use daylight saving time.

Use the interactive converter for a specific date.

Major Cities

Central Time (CT)

Chicago
Dallas
Houston

India Standard Time (IST)

Mumbai
Delhi
Bangalore

Frequently Asked Questions

What is the time difference between CST and IST?

IST is 11 hours and 30 minutes ahead of CST. When it is 8:00 AM in Chicago, it is 7:30 PM in India. During Central Daylight Time (March-November), the gap narrows to 10 hours and 30 minutes.

Does the CST to IST time difference change with daylight saving?

Yes, but only on the US side. India does not observe DST, so IST stays at UTC+5:30 year-round. When the US moves to CDT (UTC-5), the gap shrinks from 11.5 to 10.5 hours.

What is the best time for a meeting between Chicago and India?

The best overlap is 8:00-10:00 AM CST (7:30-9:30 PM IST) or during CDT, 8:00-10:00 AM CDT (6:30-8:30 PM IST). Morning calls in the US catch Indian colleagues before their evening ends.