IST to ACST/ACDT time converter
ACST/ACDT is 5 hours ahead of IST. When it is 9:00 AM in IST, it is 2:00 PM in ACST/ACDT.
Finding your time zone…
12:39 AM in IST, Saturday, October 17, 2026
Shared working hours (9:00–18:00)
IST to ACST/ACDT conversion table
Every hour of today in IST and the matching time in ACST/ACDT. Light rows are typical working hours (9:00–18:00).
| IST | ACST/ACDT |
|---|---|
| 12:00 AM | 5:00 AM |
| 1:00 AM | 6:00 AM |
| 2:00 AM | 7:00 AM |
| 3:00 AM | 8:00 AM |
| 4:00 AM | 9:00 AM |
| 5:00 AM | 10:00 AM |
| 6:00 AM | 11:00 AM |
| 7:00 AM | 12:00 PM |
| 8:00 AM | 1:00 PM |
| 9:00 AM | 2:00 PM |
| 10:00 AM | 3:00 PM |
| 11:00 AM | 4:00 PM |
| 12:00 PM | 5:00 PM |
| 1:00 PM | 6:00 PM |
| 2:00 PM | 7:00 PM |
| 3:00 PM | 8:00 PM |
| 4:00 PM | 9:00 PM |
| 5:00 PM | 10:00 PM |
| 6:00 PM | 11:00 PM |
| 7:00 PM | 12:00 AM+1 day |
| 8:00 PM | 1:00 AM+1 day |
| 9:00 PM | 2:00 AM+1 day |
| 10:00 PM | 3:00 AM+1 day |
| 11:00 PM | 4:00 AM+1 day |
Best time to call or meet
Both sides are at work from 9:00 AM – 1:00 PM in IST (2:00 PM – 6:00 PM in ACST/ACDT).
Daylight saving time and the difference
The difference changes during the year because IST and ACST/ACDT switch clocks on different dates:
- Oct 17, 2026 – Apr 3, 2027: +5h
- Apr 3, 2027 – Oct 2, 2027: +4h
- Oct 2, 2027 – Oct 17, 2027: +5h
More conversions
Questions and answers
What is the time difference between IST and ACST/ACDT?
ACST/ACDT is 5 hours ahead of IST.
What time is it in ACST/ACDT when it is 9 AM in IST?
When it is 9:00 AM in IST, it is 2:00 PM in ACST/ACDT.
When is the best time to call ACST/ACDT from IST?
Both sides are at work from 9:00 AM – 1:00 PM in IST (2:00 PM – 6:00 PM in ACST/ACDT).
Does the time difference between IST and ACST/ACDT change?
Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.