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