ACST to AWST: ACST is 1 hour 30 minutes ahead of AWST
Australian Central Time is 1 hour 30 minutes ahead of Australian Western Time right now. It is 7:39 pm ACST in Australian Central and 6:09 pm AWST in Australian Western.
Convert a specific time from ACST to AWST
Pick any time and date to convert it both ways. The conversion runs in your browser against the real zone rules, so a date inside a daylight saving period gets that period's offset rather than today's.
What is the time difference between ACST and AWST?
Australian Western Time is 1 hour 30 minutes behind Australian Central Time. To go from ACST to AWST you subtract 1 hour 30 minutes. That gap is not fixed. Across 2026 the distance between these two zones takes 2 different values, from 1 hour 30 minutes to 2 hours 30 minutes, because Australian Central moves its clocks and Australian Western does not. This page recomputes it rather than assuming.
ACST to AWST conversion table
Every hour of Friday, September 25, 2026 in Australian Central, with the matching reading in Australian Western. 2 of the 24 hours land on a different calendar date in Australian Western, which is the part people get wrong when they schedule across this pair.
| ACST | ACST 24h | AWST | AWST 24h | Date |
|---|---|---|---|---|
| 12:00 am | 00:00 | 10:30 pm | 22:30 | the previous day |
| 1:00 am | 01:00 | 11:30 pm | 23:30 | the previous day |
| 2:00 am | 02:00 | 12:30 am | 00:30 | same day |
| 3:00 am | 03:00 | 1:30 am | 01:30 | same day |
| 4:00 am | 04:00 | 2:30 am | 02:30 | same day |
| 5:00 am | 05:00 | 3:30 am | 03:30 | same day |
| 6:00 am | 06:00 | 4:30 am | 04:30 | same day |
| 7:00 am | 07:00 | 5:30 am | 05:30 | same day |
| 8:00 am | 08:00 | 6:30 am | 06:30 | same day |
| 9:00 am | 09:00 | 7:30 am | 07:30 | same day |
| 10:00 am | 10:00 | 8:30 am | 08:30 | same day |
| 11:00 am | 11:00 | 9:30 am | 09:30 | same day |
| 12:00 pm | 12:00 | 10:30 am | 10:30 | same day |
| 1:00 pm | 13:00 | 11:30 am | 11:30 | same day |
| 2:00 pm | 14:00 | 12:30 pm | 12:30 | same day |
| 3:00 pm | 15:00 | 1:30 pm | 13:30 | same day |
| 4:00 pm | 16:00 | 2:30 pm | 14:30 | same day |
| 5:00 pm | 17:00 | 3:30 pm | 15:30 | same day |
| 6:00 pm | 18:00 | 4:30 pm | 16:30 | same day |
| 7:00 pm | 19:00 | 5:30 pm | 17:30 | same day |
| 8:00 pm | 20:00 | 6:30 pm | 18:30 | same day |
| 9:00 pm | 21:00 | 7:30 pm | 19:30 | same day |
| 10:00 pm | 22:00 | 8:30 pm | 20:30 | same day |
| 11:00 pm | 23:00 | 9:30 pm | 21:30 | same day |
What are the best hours to schedule a call between ACST and AWST?
6 hours of the standard 9:00 am to 5:00 pm working day line up in both zones, from 11:00 am ACST to 5:00 pm ACST. In Australian Western that window reads 9:30 am to 3:30 pm. Outside it, one side is either not yet at their desk or already gone.
| ACST | AWST | Working hours | Note |
|---|---|---|---|
| 11:00 am | 9:30 am | both sides | mid morning in Australian Central, mid morning in Australian Western |
| 12:00 pm | 10:30 am | both sides | noon in Australian Central, mid morning in Australian Western |
| 1:00 pm | 11:30 am | both sides | afternoon in Australian Central, mid morning in Australian Western |
| 2:00 pm | 12:30 pm | both sides | afternoon in Australian Central, noon in Australian Western |
| 3:00 pm | 1:30 pm | both sides | afternoon in Australian Central, afternoon in Australian Western |
| 4:00 pm | 2:30 pm | both sides | afternoon in Australian Central, afternoon in Australian Western |
Does daylight saving change ACST to AWST?
Australian Central Time is currently on ACST and changes next on Sunday, October 4, 2026, when the clock jumps forward from 1:59 am to 3:00 am and the offset moves from UTC+9:30 to UTC+10:30.
Australian Western Time does not move its clocks at all, so its UTC+8 offset holds every day of the year.
Because the two sides do not move together, the answer to this conversion changes during the year. For part of the year the gap is 1 hour 30 minutes and for the rest it is 2 hours 30 minutes. The table above is built for today, not for an average day.
Is ACST ahead of or behind AWST?
ACST is ahead of AWST by 1 hour 30 minutes: when it is 12:00 pm in Australian Central, it is 10:30 am in Australian Western. One wrinkle worth knowing: ACST and ACDT are two names for the same zone, not two zones. Australian Central Time reads ACST in winter and ACDT in summer. When somebody types "acst to awst" they nearly always mean the zone rather than the literal winter offset, so this page resolves ACST to Australia/Adelaide and AWST to Australia/Perth and applies whichever offset is genuinely in force on the day.
Australian Central Time covers Adelaide and South Australia, on a half hour offset that also shifts for summer. Australian Western Time covers Perth and Western Australia, which stopped moving its clocks in 2009. The identifiers behind them are Australia/Adelaide and Australia/Perth, which is what any calendar or scheduling system should be storing rather than a fixed number of hours.
Questions
- What is ACST in AWST?
- ACST is 1 hour 30 minutes ahead of AWST. 9:00 am ACST is 7:30 am AWST.
- How many hours ahead is AWST of ACST?
- AWST is 1 hour 30 minutes behind ACST. That varies across the year, between 1 hour 30 minutes and 2 hours 30 minutes.
- What time is it in Australian Western right now?
- 6:09 pm AWST on Friday, September 25, 2026.
- When can Australian Central and Australian Western meet during working hours?
- Between 11:00 am and 5:00 pm ACST, which is 9:30 am to 3:30 pm AWST.
- Does this account for daylight saving?
- Yes. Every reading is computed from the IANA database for the actual date, so ACST and AWST are the abbreviations genuinely in force today rather than a fixed assumption.
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