Time in BIOT and IST
The time difference between British Indian Ocean Time (BIOT) and Indian Standard Time (IST) is 30 minutes. Indian Standard Time is 30 minutes behind British Indian Ocean Time.
This means 9am BIOT is 8:30am IST and 5pm BIOT is 4:30pm IST.
British Indian Ocean Time
- The current local time in BIOT is 4:32 am (July 19, 2026)
- BIOT time zone offset is UTC+06:00
Indian Standard Time
- The current local time in IST is 4:02 am (July 19, 2026)
- IST time zone offset is UTC+05:30
How to convert British Indian Ocean Time to Indian Standard Time?
Subtract 30 minutes from British Indian Ocean Time to get Indian Standard Time.
Time in BIOT
00:00
Time in IST
00:00
Use the slider above to convert British Indian Ocean Time to Indian Standard Time and view the day and night map at different times.
Day–night colors on the map:
Day
Civil twilight
Nautical twilight
Astronomical twilight
NightTime Conversion Chart
| BIOT | IST |
|---|---|
| 12am | 11:30pm |
| 1am | 0:30am |
| 2am | 1:30am |
| 3am | 2:30am |
| 4am | 3:30am |
| 5am | 4:30am |
| 6am | 5:30am |
| 7am | 6:30am |
| 8am | 7:30am |
| 9am | 8:30am |
| 10am | 9:30am |
| 11am | 10:30am |
| 12pm | 11:30am |
| 1pm | 12:30pm |
| 2pm | 1:30pm |
| 3pm | 2:30pm |
| 4pm | 3:30pm |
| 5pm | 4:30pm |
| 6pm | 5:30pm |
| 7pm | 6:30pm |
| 8pm | 7:30pm |
| 9pm | 8:30pm |
| 10pm | 9:30pm |
| 11pm | 10:30pm |