IST to AEST Converter
This page converts Irish Standard Time (IST) to Australian Eastern Standard Time (AEST). AEST is 9 hours ahead of IST, so a meeting at one time slides predictably to the other. Edit the time or date to begin.
Daylight saving notes
In southern Australia, daylight saving time runs from the first Sunday in October to the first Sunday in April. That affects Australian Eastern Standard Time (AEST).
IST to AEST conversion chart
For example, a 9:00 AM IST meeting takes place at 6:00 PM AEST. Concretely, when Dublin (IST) and Sydney (AEST) set up a call, aEST is 9 hours ahead of IST.
| IST time | AEST time |
|---|---|
| 12:00 AM | 9:00 AM |
| 1:00 AM | 10:00 AM |
| 2:00 AM | 11:00 AM |
| 3:00 AM | 12:00 PM |
| 4:00 AM | 1:00 PM |
| 5:00 AM | 2:00 PM |
| 6:00 AM | 3:00 PM |
| 7:00 AM | 4:00 PM |
| 8:00 AM | 5:00 PM |
| 9:00 AM | 6:00 PM |
| 10:00 AM | 7:00 PM |
| 11:00 AM | 8:00 PM |
| 12:00 PM | 9:00 PM |
| 1:00 PM | 10:00 PM |
| 2:00 PM | 11:00 PM |
| 3:00 PM | 12:00 AM+1 day |
| 4:00 PM | 1:00 AM+1 day |
| 5:00 PM | 2:00 AM+1 day |
| 6:00 PM | 3:00 AM+1 day |
| 7:00 PM | 4:00 AM+1 day |
| 8:00 PM | 5:00 AM+1 day |
| 9:00 PM | 6:00 AM+1 day |
| 10:00 PM | 7:00 AM+1 day |
| 11:00 PM | 8:00 AM+1 day |
This chart uses the fixed IST and AEST offsets; the live converter above follows current daylight saving.
Convert IST to AEST Time Zone
Below are the answers people search for most when converting Irish Standard Time (IST) to Australian Eastern Standard Time (AEST).
How do I convert IST to AEST?
It takes three quick steps:
- Click the IST field on the left and pick the time you want to convert.
- The matching AEST time updates on the right automatically — there’s no button to press.
- Need a different day? Click the date field and the result follows, rolling over if it crosses midnight.
What is the time difference between IST and AEST?
AEST is 9 hours ahead of IST. In everyday terms, once you know the time on one side you just add 9 hours to get the other — so a call between Dublin and Sydney is always 9 hours apart.
What's the current time in AEST?
Right now the time in Australian Eastern Standard Time (AEST) is Tuesday, June 30, 2026 · 3:53:59 AM. It ticks every second, so you’re always looking at the live AEST clock.
And what time is it in IST?
And in Irish Standard Time (IST), it’s currently Monday, June 29, 2026 · 6:53:59 PM. Compare the two and the 9 hours gap is easy to see.
What's the best time for a IST–AEST call?
For example, a 9:00 AM IST meeting takes place at 6:00 PM AEST. The trick is to aim for a slot that lands inside normal working hours on both sides. Once you’ve found a time, hit Share on the converter to copy a link with the time built in — easy to send to a colleague. Juggling three or more zones? The meeting planner highlights the hours that overlap for everyone.
Does daylight saving time change the IST–AEST difference?
The labels IST and AEST are fixed offsets, so the result on this page is always exact. Both regions move their clocks for daylight saving on roughly the same weekends, so the 9 hours gap usually holds steady right through the year.
How accurate is this IST to AEST conversion?
We don’t guess. IST and AEST times are worked out from the official IANA time zone database, the trusted standard that operating systems use worldwide. Because daylight-saving rules and regional offsets do change over time, we track those updates rather than relying on a fixed number — which is exactly where many converters slip up.
Convert IST to other time zones
- UTC Coordinated Universal Time
- GMT Greenwich Mean Time
- EST Eastern Standard Time
- EDT Eastern Daylight Time
- CST Central Standard Time
- CDT Central Daylight Time
- MST Mountain Standard Time
- MDT Mountain Daylight Time
- PST Pacific Standard Time
- PDT Pacific Daylight Time
- AKST Alaska Standard Time
- AKDT Alaska Daylight Time
- HST Hawaii Standard Time
- AST Atlantic Standard Time
- ADT Atlantic Daylight Time
- NST Newfoundland Standard Time
- NDT Newfoundland Daylight Time
- BRT Brasília Time
- ART Argentina Time
- WET Western European Time
- WEST Western European Summer Time
- CET Central European Time
- CEST Central European Summer Time
- EET Eastern European Time
- EEST Eastern European Summer Time
- BST British Summer Time
- MSK Moscow Standard Time
- TRT Turkey Time
- WAT West Africa Time
- CAT Central Africa Time
- EAT East Africa Time
- SAST South Africa Standard Time
- GST Gulf Standard Time
- IST Israel Standard Time
- IDT Israel Daylight Time
- IST India Standard Time
- PKT Pakistan Standard Time
- BDT Bangladesh Standard Time
- ICT Indochina Time
- WIB Western Indonesian Time
- WITA Central Indonesian Time
- WIT Eastern Indonesian Time
- CST China Standard Time
- HKT Hong Kong Time
- SGT Singapore Time
- PHT Philippine Time
- JST Japan Standard Time
- KST Korea Standard Time
- AWST Australian Western Standard Time
- ACST Australian Central Standard Time
- ACDT Australian Central Daylight Time
- AEST Australian Eastern Standard Time
- AEDT Australian Eastern Daylight Time
- NZST New Zealand Standard Time
- NZDT New Zealand Daylight Time
Convert to AEST from other time zones
- UTC Coordinated Universal Time
- GMT Greenwich Mean Time
- EST Eastern Standard Time
- EDT Eastern Daylight Time
- CST Central Standard Time
- CDT Central Daylight Time
- MST Mountain Standard Time
- MDT Mountain Daylight Time
- PST Pacific Standard Time
- PDT Pacific Daylight Time
- AKST Alaska Standard Time
- AKDT Alaska Daylight Time
- HST Hawaii Standard Time
- AST Atlantic Standard Time
- ADT Atlantic Daylight Time
- NST Newfoundland Standard Time
- NDT Newfoundland Daylight Time
- BRT Brasília Time
- ART Argentina Time
- WET Western European Time
- WEST Western European Summer Time
- CET Central European Time
- CEST Central European Summer Time
- EET Eastern European Time
- EEST Eastern European Summer Time
- BST British Summer Time
- IST Irish Standard Time
- MSK Moscow Standard Time
- TRT Turkey Time
- WAT West Africa Time
- CAT Central Africa Time
- EAT East Africa Time
- SAST South Africa Standard Time
- GST Gulf Standard Time
- IST Israel Standard Time
- IDT Israel Daylight Time
- IST India Standard Time
- PKT Pakistan Standard Time
- BDT Bangladesh Standard Time
- ICT Indochina Time
- WIB Western Indonesian Time
- WITA Central Indonesian Time
- WIT Eastern Indonesian Time
- CST China Standard Time
- HKT Hong Kong Time
- SGT Singapore Time
- PHT Philippine Time
- JST Japan Standard Time
- KST Korea Standard Time
- AWST Australian Western Standard Time
- ACST Australian Central Standard Time
- ACDT Australian Central Daylight Time
- AEDT Australian Eastern Daylight Time
- NZST New Zealand Standard Time
- NZDT New Zealand Daylight Time
Frequently asked questions
How many hours ahead of IST is AEST?
AEST is 9 hours ahead of IST — a fixed 9 hours difference, since both are fixed-offset labels.
What time is it in AEST when it's 12:00 PM IST?
When it's 12:00 PM (noon) IST, it's 9:00 PM AEST.
Do IST or AEST use daylight saving time?
Irish Standard Time (IST) observes daylight saving, alternating with GMT; Australian Eastern Standard Time (AEST) observes daylight saving, alternating with AEDT.
Why might the real-world IST–AEST difference change during the year?
The labels IST and AEST are fixed offsets, so this converter is always exact. But Irish Standard Time's region switches between standard and summer time, so for part of the year you may actually want GMT to AEST. Always check which label a region is currently using before you schedule.