CHAST to IST Converter
Quick answers
Selected conversion
The selected date and time will appear here when the converter loads.
CHAST and IST examples
These examples always use CHAST (UTC+12:45) and IST (UTC+5:30). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
CHAST is 7 hours and 15 minutes ahead of IST.
How the time difference changes
Depending on seasonal clock changes, CHAST is 7 hours and 15 minutes ahead of IST or CHADT is 8 hours and 15 minutes ahead of IST.
Depending on seasonal clock changes, working hours of 9:00 am to 5:00 pm in CHAST correspond to 1:45 am to 9:45 am in IST or working hours of 9:00 am to 5:00 pm in CHADT correspond to 12:45 am to 8:45 am in IST.
Compare CHAST time with IST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Chatham Island Standard Time is 7 hours and 15 minutes ahead of India Standard Time
6:30 am06:30 in CHAST is 11:15 pm23:15 in IST
CHAST to IST call time
Best time for a conference call or a meeting is between 4:15pm-5pm in CHAST which corresponds to 9am-9:45am in IST
6:30 am06:30 Chatham Island Standard Time (CHAST). Offset UTC +12:45 hours
11:15 pm23:15 India Standard Time (IST). Offset UTC +5:30 hours
6:30 am06:30 CHAST / 11:15 pm23:15 IST
| CHAST | IST |
|---|---|
| 12am (midnight) | 4:45 pm |
| 1am | 5:45 pm |
| 2am | 6:45 pm |
| 3am | 7:45 pm |
| 4am | 8:45 pm |
| 5am | 9:45 pm |
| 6am | 10:45 pm |
| 7am | 11:45 pm |
| 8am | 12:45 am |
| 9am | 1:45 am |
| 10am | 2:45 am |
| 11am | 3:45 am |
| 12pm (noon) | 4:45 am |
| 1pm | 5:45 am |
| 2pm | 6:45 am |
| 3pm | 7:45 am |
| 4pm | 8:45 am |
| 5pm | 9:45 am |
| 6pm | 10:45 am |
| 7pm | 11:45 am |
| 8pm | 12:45 pm |
| 9pm | 1:45 pm |
| 10pm | 2:45 pm |
| 11pm | 3:45 pm |
| 00:00 | 16:45 |
| 01:00 | 17:45 |
| 02:00 | 18:45 |
| 03:00 | 19:45 |
| 04:00 | 20:45 |
| 05:00 | 21:45 |
| 06:00 | 22:45 |
| 07:00 | 23:45 |
| 08:00 | 00:45 |
| 09:00 | 01:45 |
| 10:00 | 02:45 |
| 11:00 | 03:45 |
| 12:00 | 04:45 |
| 13:00 | 05:45 |
| 14:00 | 06:45 |
| 15:00 | 07:45 |
| 16:00 | 08:45 |
| 17:00 | 09:45 |
| 18:00 | 10:45 |
| 19:00 | 11:45 |
| 20:00 | 12:45 |
| 21:00 | 13:45 |
| 22:00 | 14:45 |
| 23:00 | 15:45 |
Chatham Island Standard Time
Offset: CHAST is 12 hours and 45 minutes ahead Greenwich Mean Time (GMT) and is used in Pacific
Countries using this time zone: New Zealand
Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Chatham Island Daylight Time (CHADT).
Start: Chatham Island Standard Time (CHAST) started on Sunday, April 5, 2026 at 3:45 am local time and clocks were set one hour back to Sunday, April 5, 2026, 2:45 am. Standard time starts annually on the first Sunday of April.
End: Chatham Island Standard Time (CHAST) ends on Sunday, September 27, 2026 at 2:45 am local time and clocks are set one hour forward to Sunday, September 27, 2026, 3:45 am local daylight time instead. Standard time ends annually on the last Sunday of September.
CHAST representations, usage and related time zones
- +1245 - basic
- +12:45 - extended
- +1245 - sign character (+) followed by a four digit time providing hours (12) and minutes (45) of the offset. Indicates an offset of twelve hours and forty-five minutes to the east of the zero meridian.
India Standard Time
Offset: IST is 5 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Asia
Countries using this time zone: India
Principal Cities: The largest city in the IST time zone is Mumbai in India, with about 12.692 million people. Other major cities in this time zone include Delhi, Bangalore, Chennai, Kolkata.
Daylight Saving: Clocks in India Standard Time (IST) do not change for daylight saving time, so IST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter.
IST representations, usage and related time zones
- +0530 - basic
- +05:30 - extended
- +0530 - sign character (+) followed by a four digit time providing hours (05) and minutes (30) of the offset. Indicates an offset of five hours and thirty minutes to the east of the zero meridian.
- Asia/Calcutta
- Asia/Kolkata
- India Standard Time - UTC +5:30
- Irish Standard Time - UTC +1
- Israel Standard Time - UTC +2