ACST to WIB converter

Australian Central Time (Adelaide) to Western Indonesia Time (Jakarta).

ACST10:37 AMSat 31 Oct 2026

→

WIB7:07 AMSat 31 Oct 2026

WIB is 3 h 30 min behind ACST.

Pick a time in ACST

⇄ WIB to ACST

9:00 AM ACST = 5:30 AM WIB same day

Best time to meet

The best time to meet is between 1:00 PM and 5:00 PM ACST, which is 9:30 AM to 1:30 PM WIB. Both sides are then inside 9 AM to 5 PM.

ACST to WIB time table

For 31 Oct 2026. Green rows: both sides between 9 AM and 5 PM.

ACST	WIB
12:00 AM ACST	8:30 PM WIB previous day
1:00 AM ACST	9:30 PM WIB previous day
2:00 AM ACST	10:30 PM WIB previous day
3:00 AM ACST	11:30 PM WIB previous day
4:00 AM ACST	12:30 AM WIB
5:00 AM ACST	1:30 AM WIB
6:00 AM ACST	2:30 AM WIB
7:00 AM ACST	3:30 AM WIB
8:00 AM ACST	4:30 AM WIB
9:00 AM ACST	5:30 AM WIB
10:00 AM ACST	6:30 AM WIB
11:00 AM ACST	7:30 AM WIB
12:00 PM ACST	8:30 AM WIB
1:00 PM ACST	9:30 AM WIB
2:00 PM ACST	10:30 AM WIB
3:00 PM ACST	11:30 AM WIB
4:00 PM ACST	12:30 PM WIB
5:00 PM ACST	1:30 PM WIB
6:00 PM ACST	2:30 PM WIB
7:00 PM ACST	3:30 PM WIB
8:00 PM ACST	4:30 PM WIB
9:00 PM ACST	5:30 PM WIB
10:00 PM ACST	6:30 PM WIB
11:00 PM ACST	7:30 PM WIB

Quick answers

9:00 AM ACST = 5:30 AM WIB
12:00 PM ACST = 8:30 AM WIB
3:00 PM ACST = 11:30 AM WIB
5:00 PM ACST = 1:30 PM WIB
9:00 AM WIB = 12:30 PM ACST
12:00 PM WIB = 3:30 PM ACST
5:00 PM WIB = 8:30 PM ACST

Does the gap change during the year?

Yes, because of daylight saving. Until 4 Apr 2027: WIB is 3 h 30 min behind ACST. From 4 Apr 2027 to 3 Oct 2027: WIB is 2 h 30 min behind ACST. From 3 Oct 2027 to 2 Apr 2028: WIB is 3 h 30 min behind ACST.

ACST next changes its clocks on 4 Apr 2027 (back 1 h, to UTC+9:30), then on 3 Oct 2027 (forward 1 h, to UTC+10:30). WIB does not change its clocks.

About ACST and WIB

ACST here means Australian Central Time, the clock in Adelaide. Right now it is UTC+10:30. Strictly, ACST is the winter name; in summer these places use ACDT. This page follows their real clock all year.

WIB here means Western Indonesia Time, the clock in Jakarta. Right now it is UTC+7. It has no daylight saving.

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