Time in CHAST and BIOT
The time difference between Chatham Standard Time (CHAST) and British Indian Ocean Time (BIOT) is 6 hours 45 minutes. British Indian Ocean Time is 6 hours 45 minutes behind Chatham Standard Time.
This means 9am CHAST is 2:15am BIOT and 5pm CHAST is 10:15am BIOT.
Chatham Standard Time
- The current local time in CHAST is 11:35 am (June 4, 2026)
- CHAST time zone offset is UTC+12:45
British Indian Ocean Time
- The current local time in BIOT is 4:50 am (June 4, 2026)
- BIOT time zone offset is UTC+06:00
How to convert Chatham Standard Time to British Indian Ocean Time?
Subtract 6 hours 45 minutes from Chatham Standard Time to get British Indian Ocean Time.
Time in CHAST
00:00
Time in BIOT
00:00
Use the slider above to convert Chatham 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
| CHAST | BIOT |
|---|---|
| 12am | 5:15pm |
| 1am | 6:15pm |
| 2am | 7:15pm |
| 3am | 8:15pm |
| 4am | 9:15pm |
| 5am | 10:15pm |
| 6am | 11:15pm |
| 7am | 0:15am |
| 8am | 1:15am |
| 9am | 2:15am |
| 10am | 3:15am |
| 11am | 4:15am |
| 12pm | 5:15am |
| 1pm | 6:15am |
| 2pm | 7:15am |
| 3pm | 8:15am |
| 4pm | 9:15am |
| 5pm | 10:15am |
| 6pm | 11:15am |
| 7pm | 12:15pm |
| 8pm | 1:15pm |
| 9pm | 2:15pm |
| 10pm | 3:15pm |
| 11pm | 4:15pm |