What is BRT in ACST?
Australian Central Time is 12 hours 30 minutes ahead
Brasília Time is on UTC−3:00 and Australian Central Time is on UTC+9:30 right now. The gap changes during the year — see below.
- Time in São Paulo
- 9:52:42 AM
- Time in Adelaide
- 10:22:42 PM
- Difference
- +12:30 h
- Next clock change
- October 4, 2026
Convert a time
ACST — Australian Central Time
9:30 pm
ACST, Fri
When the difference changes
Brasília Time and Australian Central Time do not change their clocks on the same dates, so the gap between them is not the same all year. Most converters show only today’s figure. These are the periods ahead:
- Now – October 3, 2026Australian Central Time is 12 hours 30 minutes ahead
- October 3, 2026 – April 3, 2027Australian Central Time is 13 hours 30 minutes ahead
- April 3, 2027 – October 2, 2027Australian Central Time is 12 hours 30 minutes ahead
- October 2, 2027 – onwardsAustralian Central Time is 13 hours 30 minutes ahead
Periods shorter than a day are not listed. Each zone changes at its own local time, so on a date when both move there are a few hours when the gap is briefly something else.
Daylight saving
Brasília Time
Brasília Time stays on BRT all year, so its offset from UTC never moves.
Australian Central Time
Clocks go forward one hour — 2:00 am becomes 3:00 am local time, and the zone is on ACDT after that.
BRT to ACST conversion table
Every hour of Friday, September 25, 2026, converted from Brasília Time to Australian Central Time. 12 of the 24 hours fall on a different calendar day in Adelaide, which is marked.
- 12:00 am BRT
- 12:30 pm ACST
- 1:00 am BRT
- 1:30 pm ACST
- 2:00 am BRT
- 2:30 pm ACST
- 3:00 am BRT
- 3:30 pm ACST
- 4:00 am BRT
- 4:30 pm ACST
- 5:00 am BRT
- 5:30 pm ACST
- 6:00 am BRT
- 6:30 pm ACST
- 7:00 am BRT
- 7:30 pm ACST
- 8:00 am BRT
- 8:30 pm ACST
- 9:00 am BRT
- 9:30 pm ACST
- 10:00 am BRT
- 10:30 pm ACST
- 11:00 am BRT
- 11:30 pm ACST
- 12:00 pm BRT
- 12:30 am ACST+1 day
- 1:00 pm BRT
- 1:30 am ACST+1 day
- 2:00 pm BRT
- 2:30 am ACST+1 day
- 3:00 pm BRT
- 3:30 am ACST+1 day
- 4:00 pm BRT
- 4:30 am ACST+1 day
- 5:00 pm BRT
- 5:30 am ACST+1 day
- 6:00 pm BRT
- 6:30 am ACST+1 day
- 7:00 pm BRT
- 7:30 am ACST+1 day
- 8:00 pm BRT
- 8:30 am ACST+1 day
- 9:00 pm BRT
- 9:30 am ACST+1 day
- 10:00 pm BRT
- 10:30 am ACST+1 day
- 11:00 pm BRT
- 11:30 am ACST+1 day
Scheduling between the two
There is no overlap between a nine-to-six working day in São Paulo and one in Adelaide — the gap is too wide. A call has to sit early or late for one side. Early morning in São Paulo is the usual compromise, since that is late afternoon or evening in Adelaide.
Brasília Time (BRT) is used in Rio de Janeiro and Brasília. Brazil ended daylight saving in 2019.
Australian Central Time (ACST) is used in South Australia and the Northern Territory, on a half-hour offset from the east coast
Other conversions
- ACST to BRT
- BRT to UTC
- BRT to GMT
- BRT to EST
- BRT to CST
- BRT to MST
- BRT to PST
- BRT to AKST
- BRT to HST
- BRT to BST
- BRT to CET
- BRT to IST
- BRT to CST (China)
- BRT to JST
- BRT to AEST
- BRT to AST
- BRT to Mexico City
- BRT to ART
- BRT to EET
- BRT to WET
- BRT to MSK
- BRT to TRT
- BRT to SAST
- BRT to WAT
- BRT to EAT
- BRT to GST
- BRT to PKT
- BRT to ICT
- BRT to WIB
- BRT to SGT
- BRT to HKT
- BRT to KST
- BRT to PHT
- BRT to AWST
- BRT to NZST
- All zones