IST to Chittagong Time Converter
BST is 30 minutes ahead of IST. 9:00 AM IST = 9:30 AM BST.
BST is 30 minutes ahead of IST. To convert IST to Chittagong Time, add 30 minutes to the IST time: 9:00 AM IST = 9:30 AM BST.
IST (India Time) is used in India and Sri Lanka (UTC+5:30, no daylight saving time). Chittagong Time (Chittagong time) is used in Chittagong, Bangladesh.
IST here means India Standard Time, not Irish or Israel Standard Time.
IST to Chittagong Time time conversion table
IST to Chittagong Time on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| IST | Chittagong Time |
|---|---|
| 12:00 AM | 12:30 AM |
| 1:00 AM | 1:30 AM |
| 2:00 AM | 2:30 AM |
| 3:00 AM | 3:30 AM |
| 4:00 AM | 4:30 AM |
| 5:00 AM | 5:30 AM |
| 6:00 AM | 6:30 AM |
| 7:00 AM | 7:30 AM |
| IST | Chittagong Time |
|---|---|
| 8:00 AM | 8:30 AM |
| 9:00 AM | 9:30 AM |
| 10:00 AM | 10:30 AM |
| 11:00 AM | 11:30 AM |
| 12:00 PM | 12:30 PM |
| 1:00 PM | 1:30 PM |
| 2:00 PM | 2:30 PM |
| 3:00 PM | 3:30 PM |
| IST | Chittagong Time |
|---|---|
| 4:00 PM | 4:30 PM |
| 5:00 PM | 5:30 PM |
| 6:00 PM | 6:30 PM |
| 7:00 PM | 7:30 PM |
| 8:00 PM | 8:30 PM |
| 9:00 PM | 9:30 PM |
| 10:00 PM | 10:30 PM |
| 11:00 PM | 11:30 PM |
Conversion table from IST to Chittagong Time for 7 Nov 2026. A tick marks hours that fall between 9 AM and 5 PM in both places. +1 means the next day in Chittagong Time, −1 the previous day.
- ✓ marks 9 AM–5 PM in both places
- Greyed times are night in the destination (10 PM–6 AM)
How to convert IST to Chittagong Time
Add 30 minutes to the IST time to get Chittagong Time.
Example: 9:00 AM IST = 9:30 AM BST.
Time difference between IST and Chittagong Time
The time difference between IST and Chittagong Time is 30 minutes all year – BST is ahead of IST.
IST and Chittagong Time during daylight saving time
- IST does not observe daylight saving time; it stays on UTC+5:30 all year.
- Chittagong Time does not observe daylight saving time; it stays on UTC+6 all year.
Best time for a meeting between IST and Chittagong Time
IST and Chittagong Time share 7 hours 30 minutes of the 9 AM–5 PM working day. Any time between 9:00 AM and 4:30 PM IST lands between 9:30 AM and 5:00 PM BST, inside working hours for both.
IST to Chittagong Time FAQ
What is the time difference between IST and Chittagong Time?
BST is 30 minutes ahead of IST all year. 9:00 AM IST = 9:30 AM BST.
What is 9 AM IST in Chittagong Time?
9:00 AM IST is 9:30 AM BST.
What is 12 PM (noon) IST in Chittagong Time?
12:00 PM IST is 12:30 PM BST.
Is Chittagong Time ahead of or behind IST?
BST is 30 minutes ahead of IST, so it is later in Chittagong Time than in IST.
Does IST change for daylight saving time?
No. IST stays on the same offset all year, so conversions never shift for daylight saving time.
Does Chittagong Time change for daylight saving time?
No. Chittagong Time stays on the same offset all year, so conversions never shift for daylight saving time.
What is the best time for a meeting between IST and Chittagong Time?
IST and Chittagong Time share 7 hours 30 minutes of the 9 AM–5 PM working day. Any time between 9:00 AM and 4:30 PM IST lands between 9:30 AM and 5:00 PM BST, inside working hours for both.
Related conversions
Convert Chittagong Time to IST
Convert IST to other time zones
Convert other time zones to Chittagong Time
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.