WIB to AEST
Australian Eastern Time is 4 hours ahead of Western Indonesia Time for 183 days of the year, and takes 2 different values across the year.
WIB to AEST conversion table
Every hour of the day at the difference that holds for 183 days of 2026 — 4 hours. See “When the difference changes” below for the rest.
| WIB | AEST |
|---|---|
| 12:00 AM | 4:00 AM |
| 1:00 AM | 5:00 AM |
| 2:00 AM | 6:00 AM |
| 3:00 AM | 7:00 AM |
| 4:00 AM | 8:00 AM |
| 5:00 AM | 9:00 AM |
| 6:00 AM | 10:00 AM |
| 7:00 AM | 11:00 AM |
| 8:00 AM | 12:00 PM |
| 9:00 AM | 1:00 PM |
| 10:00 AM | 2:00 PM |
| 11:00 AM | 3:00 PM |
| WIB | AEST |
|---|---|
| 12:00 PM | 4:00 PM |
| 1:00 PM | 5:00 PM |
| 2:00 PM | 6:00 PM |
| 3:00 PM | 7:00 PM |
| 4:00 PM | 8:00 PM |
| 5:00 PM | 9:00 PM |
| 6:00 PM | 10:00 PM |
| 7:00 PM | 11:00 PM |
| 8:00 PM | 12:00 AM +1 day |
| 9:00 PM | 1:00 AM +1 day |
| 10:00 PM | 2:00 AM +1 day |
| 11:00 PM | 3:00 AM +1 day |
Shared working hours
Taking a working day as 09:00–17:00 in each zone, Western Indonesia Time and Australian Eastern Time overlap for 4 hours.
9:00 AM–1:00 PM in WIB is 1:00 PM–5:00 PM in AEST.
When the difference changes
The two zones move their clocks on different dates, so the gap takes more than one value. These are the stretches of 2026:
| Dates | AEST is | Why |
|---|---|---|
| 1 January – 4 April | 4 hours ahead of | — |
| 4 April – 3 October | 3 hours ahead of | Australian Eastern Time clocks go back one hour |
| 3 October – 1 January | 4 hours ahead of | Australian Eastern Time clocks go forward one hour |
Dates are Western Indonesia Time local dates for 2026. Transition dates move by a few days from year to year; the rule each country follows does not.
About Western Indonesia Time
Indonesia spans three zones; WIB is the western one, at a fixed UTC+7, and it covers Jakarta, Sumatra and most of the population. Central Indonesia is an hour ahead and the east two, so "Indonesia time" is only unambiguous once you know which.
Cities on this clock: Jakarta, Bangkok, Ho Chi Minh City, Hanoi, Phnom Penh.
About Australian Eastern Time
Sydney, Melbourne and Canberra run at UTC+10 as AEST and UTC+11 as AEDT, changing on the first Sunday in October and the first Sunday in April. Queensland does not change at all, so Brisbane matches Sydney for about half the year and sits an hour behind it for the rest — on the same "Eastern" label.
Cities on this clock: Sydney, Melbourne.
How the difference is worked out
The gap between Western Indonesia Time and Australian Eastern Time is not one number. The two zones change their clocks on different dates, so for part of the year the difference is 4 hours and for the rest it is something else — the table above lists each stretch of 2026 with the date it starts and which country's clocks moved.
With both zones on their own standard time — daylight saving not in force anywhere — Australian Eastern Time is 3 hours ahead of Western Indonesia Time. That figure never changes; everything else on this page follows from it plus whichever clocks have moved.
Every figure here comes from the IANA time zone database via your browser's own Intl engine, using the zone ids Asia/Jakarta and Australia/Sydney. Nothing is looked up on a server and nothing about your visit is recorded.
Is AEST ahead of or behind WIB?
Australian Eastern Time is 4 hours ahead of Western Indonesia Time for 183 days of the year, and takes 2 different values across the year. The gap moves because the two zones change their clocks on different dates — on 4 April, Australian Eastern Time clocks go back one hour; on 3 October, Australian Eastern Time clocks go forward one hour (dates for 2026).
What time is 9 AM WIB in AEST?
9:00 AM WIB is 1:00 PM AEST for most of the year — see the table above for the 3 stretches of 2026 the gap holds different values.
When can Western Indonesia Time and Australian Eastern Time meet?
Taking a working day as 09:00–17:00 in each zone, the two overlap for 4 hours: 9:00 AM–1:00 PM in Western Indonesia Time, which is 1:00 PM–5:00 PM in Australian Eastern Time.
What does WIB stand for?
WIB is Western Indonesia Time, also written Jakarta time, Indonesia time. Indonesia spans three zones; WIB is the western one, at a fixed UTC+7, and it covers Jakarta, Sumatra and most of the population. Central Indonesia is an hour ahead and the east two, so "Indonesia time" is only unambiguous once you know which.