Convert AEST to UTC
UTC = AEST −10 h
UTC is 10 hours behind AEST. AEST is always UTC+10, so this gap is the same on every date.
AEST · Australian Eastern Standard Time · UTC+10
2:03AM
Wednesday, November 4, 2026
UTC · Coordinated Universal Time · UTC+0
4:03PM
Tuesday, November 3, 2026
Sydney is on AEDT (UTC+11) right now.
- Next clock change: April 4, 2027. Sydney moves to AEST (UTC+10), so UTC is then 10 hours behind Sydney.
- Next clock change: October 3, 2027. Sydney moves to AEDT (UTC+11), so UTC is then 11 hours behind Sydney.
AEST to UTC for every hour
Each UTC column holds for part of the year (dates in the header for 2027). The first uses the fixed offset (AEST UTC+10); the others give local clock time when daylight saving time changes the gap. Until 10:00 AM AEST, UTC is still on the previous calendar day. The dot marks the current AEST hour.
| AEST | UTC −10 hfixed offsets | UTC −11 hJan 1 – Apr 4, Oct 3 – Dec 31 | 24-hour |
|---|---|---|---|
| 12:00 AM | 2:00 PM −1 day | 1:00 PM −1 day | 00:00 → 14:00 |
| 1:00 AM | 3:00 PM −1 day | 2:00 PM −1 day | 01:00 → 15:00 |
| 2:00 AM | 4:00 PM −1 day | 3:00 PM −1 day | 02:00 → 16:00 |
| 3:00 AM | 5:00 PM −1 day | 4:00 PM −1 day | 03:00 → 17:00 |
| 4:00 AM | 6:00 PM −1 day | 5:00 PM −1 day | 04:00 → 18:00 |
| 5:00 AM | 7:00 PM −1 day | 6:00 PM −1 day | 05:00 → 19:00 |
| 6:00 AM | 8:00 PM −1 day | 7:00 PM −1 day | 06:00 → 20:00 |
| 7:00 AM | 9:00 PM −1 day | 8:00 PM −1 day | 07:00 → 21:00 |
| 8:00 AM | 10:00 PM −1 day | 9:00 PM −1 day | 08:00 → 22:00 |
| 9:00 AM | 11:00 PM −1 day | 10:00 PM −1 day | 09:00 → 23:00 |
| 10:00 AM | 12:00 AM | 11:00 PM −1 day | 10:00 → 00:00 |
| 11:00 AM | 1:00 AM | 12:00 AM | 11:00 → 01:00 |
| 12:00 PM | 2:00 AM | 1:00 AM | 12:00 → 02:00 |
| 1:00 PM | 3:00 AM | 2:00 AM | 13:00 → 03:00 |
| 2:00 PM | 4:00 AM | 3:00 AM | 14:00 → 04:00 |
| 3:00 PM | 5:00 AM | 4:00 AM | 15:00 → 05:00 |
| 4:00 PM | 6:00 AM | 5:00 AM | 16:00 → 06:00 |
| 5:00 PM | 7:00 AM | 6:00 AM | 17:00 → 07:00 |
| 6:00 PM | 8:00 AM | 7:00 AM | 18:00 → 08:00 |
| 7:00 PM | 9:00 AM | 8:00 AM | 19:00 → 09:00 |
| 8:00 PM | 10:00 AM | 9:00 AM | 20:00 → 10:00 |
| 9:00 PM | 11:00 AM | 10:00 AM | 21:00 → 11:00 |
| 10:00 PM | 12:00 PM | 11:00 AM | 22:00 → 12:00 |
| 11:00 PM | 1:00 PM | 12:00 PM | 23:00 → 13:00 |
The AEST times people look up most
| AEST | UTC −10 h | UTC −11 h |
|---|---|---|
| 12:15 AM | 2:15 PM −1 day | 1:15 PM −1 day |
| 10:26 PM | 12:26 PM | 11:26 AM |
| 5:00 AM | 7:00 PM −1 day | 6:00 PM −1 day |
| 12:00 AM | 2:00 PM −1 day | 1:00 PM −1 day |
Does the difference change during the year?
As written, no: AEST is always UTC+10, so the gap is 10 hours on every date. But Sydney uses AEST only in winter, and people often keep writing “AEST” when they mean the local time. Between the local clock in Sydney and UTC, the gap is 11 hours or 10 hours:
| From | What changes | Sydney | UTC | UTC vs AEST |
|---|---|---|---|---|
| January 1 | Start of the year | AEDT (UTC+11) | UTC (UTC+0) | −11 h |
| April 5 | Sydney moves to AEST (UTC+10) | AEST (UTC+10) | UTC (UTC+0) | −10 h |
| October 4 | Sydney moves to AEDT (UTC+11) | AEDT (UTC+11) | UTC (UTC+0) | −11 h |
| From | What changes | Sydney | UTC | UTC vs AEST |
|---|---|---|---|---|
| January 1 | Start of the year | AEDT (UTC+11) | UTC (UTC+0) | −11 h |
| April 4 | Sydney moves to AEST (UTC+10) | AEST (UTC+10) | UTC (UTC+0) | −10 h |
| October 3 | Sydney moves to AEDT (UTC+11) | AEDT (UTC+11) | UTC (UTC+0) | −11 h |
Converting AEST to UTC by hand
With the fixed offsets, take away 10 hours: 3:30 PM AEST is 5:30 AM UTC. In your head it is easier to swap AM and PM, then add 2 hours: 3:30 PM, 3:30 AM, 5:30 AM.
With the −11 h gap (Jan 1 – Apr 4, Oct 3 – Dec 31), take away 11 hours: 3:30 PM AEST is 4:30 AM UTC. In your head it is easier to swap AM and PM, then add 1 hour: 3:30 PM, 3:30 AM, 4:30 AM.
Going back from UTC to AEST, do the opposite.
Reading a UTC timestamp as AEST time
Logs, APIs and flight plans usually carry UTC. A timestamp ending in Z is UTC, and one ending in an offset already says how far from UTC it is. These two name the same moment:
2027-01-15T20:00:00Z2027-01-16T06:00:00+10:00
The offset in the second form is the one in force on that date (January 15, 2027). A program should store the UTC form and apply the right offset when it displays the time, rather than storing a local time and hoping the offset is still the same.
What AEST and UTC mean
Australian Eastern Standard Time
AEST is UTC+10. Queensland (Brisbane) uses it all year; New South Wales, Victoria, Tasmania and the ACT (Sydney, Melbourne, Hobart, Canberra) use it only in the southern winter, roughly April to October, and AEDT (UTC+11) the rest of the year.
Coordinated Universal Time
UTC is the world’s reference time. It has no daylight saving time and no seasons: every UTC offset you see (UTC−5, UTC+5:30) is measured from it.