Time in IST and BIOT
The time difference between Indian Standard Time (IST) and British Indian Ocean Time (BIOT) is 30 minutes. British Indian Ocean Time is 30 minutes ahead of Indian Standard Time.
This means 9am IST is 9:30am BIOT and 5pm IST is 5:30pm BIOT.
Indian Standard Time
- The current local time in IST is 7:04 pm (July 18, 2026)
- IST time zone offset is UTC+05:30
British Indian Ocean Time
- The current local time in BIOT is 7:34 pm (July 18, 2026)
- BIOT time zone offset is UTC+06:00
How to convert Indian Standard Time to British Indian Ocean Time?
Add 30 minutes to Indian Standard Time to get British Indian Ocean Time.
Time in IST
00:00
Time in BIOT
00:00
Use the slider above to convert Indian Standard Time to British Indian Ocean 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
| IST | BIOT |
|---|---|
| 12am | 0:30am |
| 1am | 1:30am |
| 2am | 2:30am |
| 3am | 3:30am |
| 4am | 4:30am |
| 5am | 5:30am |
| 6am | 6:30am |
| 7am | 7:30am |
| 8am | 8:30am |
| 9am | 9:30am |
| 10am | 10:30am |
| 11am | 11:30am |
| 12pm | 12:30pm |
| 1pm | 1:30pm |
| 2pm | 2:30pm |
| 3pm | 3:30pm |
| 4pm | 4:30pm |
| 5pm | 5:30pm |
| 6pm | 6:30pm |
| 7pm | 7:30pm |
| 8pm | 8:30pm |
| 9pm | 9:30pm |
| 10pm | 10:30pm |
| 11pm | 11:30pm |