BST to ACST Time Converter
ACST is 10 hours 30 minutes ahead of BST right now. 9:00 AM in BST is 7:30 PM in ACST.
Time now: BST and ACST
ACST is 10 hours 30 minutes ahead of BST right now. The gap is not fixed: it is 8 hours 30 minutes at some times of the year and 10 hours 30 minutes at others, because at least one of them changes its clocks for daylight saving time.
BST to ACST conversion table
Every hour of the day, using today's time difference.
| BST | ACST |
|---|---|
| 12:00 AM | 10:30 AM |
| 1:00 AM | 11:30 AM |
| 2:00 AM | 12:30 PM |
| 3:00 AM | 1:30 PM |
| 4:00 AM | 2:30 PM |
| 5:00 AM | 3:30 PM |
| 6:00 AM | 4:30 PM |
| 7:00 AM | 5:30 PM |
| 8:00 AM | 6:30 PM |
| 9:00 AM | 7:30 PM |
| 10:00 AM | 8:30 PM |
| 11:00 AM | 9:30 PM |
| 12:00 PM | 10:30 PM |
| 1:00 PM | 11:30 PM |
| 2:00 PM | 12:30 AMnext day |
| 3:00 PM | 1:30 AMnext day |
| 4:00 PM | 2:30 AMnext day |
| 5:00 PM | 3:30 AMnext day |
| 6:00 PM | 4:30 AMnext day |
| 7:00 PM | 5:30 AMnext day |
| 8:00 PM | 6:30 AMnext day |
| 9:00 PM | 7:30 AMnext day |
| 10:00 PM | 8:30 AMnext day |
| 11:00 PM | 9:30 AMnext day |
Best time to meet between BST and ACST
There is no overlap between 9 AM and 6 PM in both places.
If both sides can be flexible (7 AM – 10 PM):
- 7:00 AM – 12:00 PM BST = 5:30 PM – 10:30 PM ACST
- 9:00 PM – 10:00 PM BST = 7:30 AM – 8:30 AM ACST
The time difference changes during the year because of daylight saving time, so these windows shift by an hour at other times.
Does the time difference between BST and ACST change?
Yes. Right now ACST is 10 hours 30 minutes ahead of BST. These are the dates in the next 12 months when the gap changes:
- Sunday, 28 March 2027: BST moves its clocks forward. ACST is 9 hours 30 minutes ahead of BST from then (it was 10 hours 30 minutes before).
- Sunday, 4 April 2027: ACST moves its clocks back. ACST is 8 hours 30 minutes ahead of BST from then (it was 9 hours 30 minutes before).
- Sunday, 3 October 2027: ACST moves its clocks forward. ACST is 9 hours 30 minutes ahead of BST from then (it was 8 hours 30 minutes before).
- Sunday, 31 October 2027: BST moves its clocks back. ACST is 10 hours 30 minutes ahead of BST from then (it was 9 hours 30 minutes before).
Office hours in each other's time
- 9 AM to 6 PM in BST is 7:30 PM to 4:30 AM (next day) in ACST.
- 9 AM to 6 PM in ACST is 10:30 PM (previous day) to 7:30 AM in BST.
Based on today's clock settings.
Frequently asked questions
What is the time difference between BST and ACST?
ACST is 10 hours 30 minutes ahead of BST right now. The gap is not fixed: it is 8 hours 30 minutes at some times of the year and 10 hours 30 minutes at others, because at least one of them changes its clocks for daylight saving time.
How do I convert BST to ACST?
Add 10 hours 30 minutes to the BST time to get the ACST time (at today's difference). 9:00 AM in BST is 7:30 PM in ACST. Or use the converter above and pick any date and time.
What is the current time in ACST?
It is 10:28 AM in ACST on Tuesday, November 10 (the converter above shows it live). At the same moment it is 11:58 PM in BST.
Does the time difference between BST and ACST change during the year?
Yes. Right now ACST is 10 hours 30 minutes ahead of BST. Over the next 12 months the gap changes 4 times: Sunday, 28 March 2027: BST moves its clocks forward. ACST is 9 hours 30 minutes ahead of BST from then (it was 10 hours 30 minutes before). Sunday, 4 April 2027: ACST moves its clocks back. ACST is 8 hours 30 minutes ahead of BST from then (it was 9 hours 30 minutes before). Sunday, 3 October 2027: ACST moves its clocks forward. ACST is 9 hours 30 minutes ahead of BST from then (it was 8 hours 30 minutes before). Sunday, 31 October 2027: BST moves its clocks back. ACST is 10 hours 30 minutes ahead of BST from then (it was 9 hours 30 minutes before).
What is the best time for a meeting between BST and ACST?
The two places have no shared working hours (9 AM – 6 PM). The nearest option is 7:00 AM – 12:00 PM BST = 5:30 PM – 10:30 PM ACST.
What does BST mean?
The UK uses GMT in winter and BST in summer.