Time in BIOT and CHAST
The time difference between British Indian Ocean Time (BIOT) and Chatham Standard Time (CHAST) is 6 hours 45 minutes. Chatham Standard Time is 6 hours 45 minutes ahead of British Indian Ocean Time.
This means 9am BIOT is 3:45pm CHAST and 5pm BIOT is 11:45pm CHAST.
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
Chatham Standard Time
- The current local time in CHAST is 11:17 am (July 19, 2026)
- CHAST time zone offset is UTC+12:45
How to convert British Indian Ocean Time to Chatham Standard Time?
Add 6 hours 45 minutes to British Indian Ocean Time to get Chatham Standard Time.
Time in BIOT
00:00
Time in CHAST
00:00
Use the slider above to convert British Indian Ocean Time to Chatham 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 | CHAST |
|---|---|
| 12am | 6:45am |
| 1am | 7:45am |
| 2am | 8:45am |
| 3am | 9:45am |
| 4am | 10:45am |
| 5am | 11:45am |
| 6am | 12:45pm |
| 7am | 1:45pm |
| 8am | 2:45pm |
| 9am | 3:45pm |
| 10am | 4:45pm |
| 11am | 5:45pm |
| 12pm | 6:45pm |
| 1pm | 7:45pm |
| 2pm | 8:45pm |
| 3pm | 9:45pm |
| 4pm | 10:45pm |
| 5pm | 11:45pm |
| 6pm | 0:45am |
| 7pm | 1:45am |
| 8pm | 2:45am |
| 9pm | 3:45am |
| 10pm | 4:45am |
| 11pm | 5:45am |