GMT to ACST Converter
ACST is 9.5 hours ahead of GMT.
GMT
Thursday, October 1, 2026
Greenwich Mean Time · UTC+0
ACST
Friday, October 2, 2026
Australian Central Standard Time · UTC+9:30
Convert GMT to ACST
GMT 18:59 = ACST 04:29
GMT to ACST time chart, hour by hour
| GMT | ACST |
|---|
| 00:00 | 09:30 |
| 01:00 | 10:30 |
| 02:00 | 11:30 |
| 03:00 | 12:30 |
| 04:00 | 13:30 |
| 05:00 | 14:30 |
| 06:00 | 15:30 |
| 07:00 | 16:30 |
| 08:00 | 17:30 |
| 09:00 | 18:30 |
| 10:00 | 19:30 |
| 11:00 | 20:30 |
| 12:00 | 21:30 |
| 13:00 | 22:30 |
| 14:00 | 23:30 |
| 15:00 | 00:30 +1 day |
| 16:00 | 01:30 +1 day |
| 17:00 | 02:30 +1 day |
| 18:00 | 03:30 +1 day |
| 19:00 | 04:30 +1 day |
| 20:00 | 05:30 +1 day |
| 21:00 | 06:30 +1 day |
| 22:00 | 07:30 +1 day |
| 23:00 | 08:30 +1 day |
There is no overlap between 09:00–18:00 working days in these two places.
How many hours is GMT behind ACST?
As abbreviations, ACST is always 9.5 hours ahead of GMT: GMT is UTC+0 and ACST is UTC+9:30. To convert, add 9.5 hours.
Does the GMT to ACST time difference change?
No. Acst is 9.5 hours ahead of gmt all year, because neither place changes its clocks.
Calling hours for GMT and ACST
- When ACST is 9.5 hours ahead of GMT: no shared 09:00 to 17:00 hours; try 08:00 in GMT (17:30 in ACST).
Frequently asked questions about GMT and ACST time
How many hours ahead is ACST of GMT?
ACST (UTC+9:30) is 9.5 hours ahead of GMT (UTC+0).
Does the time difference between GMT and ACST change during the year?
No, it stays 9.5 hours ahead all year because neither place changes its clocks.