IST to BTT Converter
BTT is 0.5 hours ahead of IST.
IST
Thursday, October 22, 2026
India Standard Time · UTC+5:30
BTT
Thursday, October 22, 2026
Bhutan Time · UTC+6
Convert IST to BTT
IST 17:38 = BTT 18:08
IST to BTT time chart, hour by hour
| IST | BTT |
|---|
| 00:00 | 00:30 |
| 01:00 | 01:30 |
| 02:00 | 02:30 |
| 03:00 | 03:30 |
| 04:00 | 04:30 |
| 05:00 | 05:30 |
| 06:00 | 06:30 |
| 07:00 | 07:30 |
| 08:00 | 08:30 |
| 09:00 | 09:30 |
| 10:00 | 10:30 |
| 11:00 | 11:30 |
| 12:00 | 12:30 |
| 13:00 | 13:30 |
| 14:00 | 14:30 |
| 15:00 | 15:30 |
| 16:00 | 16:30 |
| 17:00 | 17:30 |
| 18:00 | 18:30 |
| 19:00 | 19:30 |
| 20:00 | 20:30 |
| 21:00 | 21:30 |
| 22:00 | 22:30 |
| 23:00 | 23:30 |
Highlighted rows fall within 09:00–18:00 in both places: 9 shared working hours.
How many hours is IST behind BTT?
As abbreviations, BTT is always 0.5 hours ahead of IST: IST is UTC+5:30 and BTT is UTC+6. To convert, add 0.5 hours.
Does the IST to BTT time difference change?
No. Btt is 0.5 hours ahead of ist all year, because neither place changes its clocks.
When IST and BTT are both at work
- When BTT is 0.5 hours ahead of IST: 8 shared office hours, 09:00 to 17:00 in IST (09:30 to 17:30 in BTT).
Frequently asked questions about IST and BTT time
How many hours ahead is BTT of IST?
BTT (UTC+6) is 0.5 hours ahead of IST (UTC+5:30).
Does the time difference between IST and BTT change during the year?
No, it stays 0.5 hours ahead all year because neither place changes its clocks.