Compare AEST vs PST
See the current time gap between AEST and PST, understand seasonal DST changes, and find the best hours to schedule meetings.
How to Find the Time Difference Between AEST and PST
Open the AEST vs PST converter page: Go to https://www.xconvert.com/time-converter/aest-vs-pst to open the visual comparison grid with AEST and PST already loaded as the two rows. This page is useful when you are scheduling a call between Australia’s east coast business centers such as Sydney, Melbourne, and Brisbane and teams on the U.S. Pacific coast, including Los Angeles, San Francisco, Seattle, and Vancouver-area operations that often follow Pacific time conventions for tech, media, and e-commerce work.
Add relevant comparison cities with the “+ Add City” button: Click “+ Add City” and search for cities such as Sydney, Los Angeles, and San Francisco, or add Singapore or London if you are coordinating a broader follow-the-sun support schedule. This is especially practical for industries like software engineering, digital agencies, gaming, cloud operations, and financial services, where an AEST-based team may hand work to a U.S. West Coast team at the end of the Australian business day.
Drag across the grid to select a meeting window: Click “Select” if needed, then drag across the colored timeline on the AEST row to highlight a range such as 9:00 AM to 11:00 AM AEST; the purple selection will instantly show the matching time in PST as 3:00 PM to 5:00 PM on the previous day when the standard 18-hour difference applies. You can drag the center of the purple block to test alternatives or use the left and right handles to resize it, which is helpful for confirming whether an Australian morning standup lands inside the prior afternoon on the U.S. West Coast rather than during California evening hours.
Export the selected time for your team: Once a range is selected, use the export options for ICS download, Google Calendar, Gmail, Copy to clipboard, or Share link. For example, a project manager in Melbourne can send the ICS file to a distributed product team so the event appears in each person’s local time automatically, or use Share link in Slack or email so contractors in both Australia and North America open the exact same comparison window without recalculating offsets manually.
AEST vs PST Offset Explained
AEST (Australian Eastern Standard Time) is UTC+10:00, while PST (Pacific Standard Time) is UTC-8:00, so AEST is 18 hours ahead of PST. In practical terms, when it is 9:00 AM in AEST, it is 3:00 PM in PST on the previous day. That previous-day shift is the biggest source of scheduling mistakes, especially for recurring meetings between Australian teams and U.S. West Coast companies.
The exact difference changes during daylight saving periods because AEST itself is standard time, while parts of eastern Australia and the U.S. Pacific region may switch to daylight time seasonally. On the U.S. side, Pacific Standard Time changes to Pacific Daylight Time (PDT, UTC-7) from 2:00 AM on the second Sunday in March until 2:00 AM on the first Sunday in November; in 2025, that means from March 9, 2025 to November 2, 2025. During that period, AEST is 17 hours ahead of PDT, not 18.
On the Australian side, the term AEST specifically refers to standard time UTC+10:00, used year-round in Queensland and seasonally in New South Wales, Victoria, Tasmania, and the Australian Capital Territory outside daylight saving. When southeastern Australia moves to AEDT (UTC+11), typically from the first Sunday in October to the first Sunday in April, the gap versus PST becomes 19 hours, and the gap versus PDT becomes 18 hours. For example, if Sydney is on AEDT while Los Angeles is on PST, 9:00 AM in Sydney corresponds to 2:00 PM in Los Angeles on the previous day.
This matters for real business operations because Australia-U.S. Pacific coordination is common in software development, cloud infrastructure monitoring, online education, digital marketing, and media production. A Brisbane-based support team working at 8:00 AM AEST can hand off unresolved tickets to a California team at 2:00 PM PST the previous day, which creates near-continuous coverage but also requires careful handling of calendar dates. If you are booking flights or planning travel, the same offset logic affects departure and arrival interpretation, especially on routes through Sydney, Melbourne, Brisbane, Los Angeles, and San Francisco, where crossing the International Date Line can make itineraries appear to arrive “before” they depart in local clock time.
AEST is associated with some of Australia’s largest population centers and economic regions. Sydney has a population of roughly 5.3 million, Melbourne about 5.2 million, and Brisbane about 2.6 million, making eastern Australia a major hub for banking, education, healthcare, logistics, and technology. On the Pacific side, Los Angeles has about 3.8 million residents and the broader metro is much larger, while San Francisco Bay Area companies dominate sectors such as SaaS, semiconductors, venture-backed startups, and AI, so cross-time-zone scheduling between these regions is routine.
A useful rule of thumb is that AEST morning overlaps with the previous afternoon in PST, while AEST late afternoon often falls into late-night or pre-dawn hours on the U.S. West Coast. For example, 1:00 PM AEST = 7:00 PM PST previous day, and 6:00 PM AEST = 12:00 AM PST previous day. That means the best overlap for live meetings usually sits around AEST 7:00 AM to 11:00 AM, which maps roughly to PST 1:00 PM to 5:00 PM on the previous day during standard time.
Frequently Asked Questions
What is the exact time difference between AEST and PST?
AEST is 18 hours ahead of PST when both are on standard time, because AEST = UTC+10:00 and PST = UTC-8:00. So if it is 10:00 AM AEST, it is 4:00 PM PST on the previous day. The previous-day conversion is important because many missed meetings happen when people remember the hour difference but forget the date change.
Is AEST always 18 hours ahead of Pacific Time?
No, because Pacific Time does not stay on PST all year. When the U.S. West Coast switches to PDT (UTC-7) from March 9, 2025 to November 2, 2025, AEST is 17 hours ahead of Pacific Daylight Time instead of 18. Also, if an Australian eastern city is observing AEDT (UTC+11) rather than AEST, the difference changes again.
Why do some Australian cities not match AEST year-round?
The label AEST means Australian Eastern Standard Time, UTC+10:00, but not every eastern Australian city stays on that offset all year. Brisbane, Queensland remains on UTC+10:00 year-round, while Sydney, Melbourne, Canberra, and Hobart typically move to AEDT, UTC+11:00, from the first Sunday in October to the first Sunday in April. If you are scheduling with Queensland, the offset is often simpler because there is no local daylight saving change.
When is the best meeting time between AEST and PST?
For most teams, the most workable overlap is early morning in AEST and prior afternoon in PST. A meeting at 8:00 AM AEST corresponds to 2:00 PM PST on the previous day during standard time, which is practical for Australian staff starting work and California teams still in normal office hours. By contrast, 3:00 PM AEST becomes 9:00 PM PST on the previous day, which is usually too late for live collaboration unless one side is explicitly working flexible hours.
How do I convert 9 AM AEST to PST?
Under standard offsets, 9:00 AM AEST converts to 3:00 PM PST on the previous day. You subtract 18 hours and then adjust the calendar date backward by one day. If the U.S. Pacific zone is on PDT instead of PST, 9:00 AM AEST becomes 4:00 PM PDT on the previous day.
Is Sydney the same as AEST all year?
No. Sydney uses AEST (UTC+10:00) only during the non-daylight-saving part of the year and switches to AEDT (UTC+11:00) during daylight saving, usually from the first Sunday in October to the first Sunday in April. That means a page comparing AEST vs PST is accurate for Sydney only during Sydney’s standard-time months; for summer dates in Sydney, you should compare AEDT vs PST or AEDT vs PDT depending on the U.S. date.
Why is scheduling between Australia and the U.S. West Coast so tricky?
The challenge comes from three factors happening at once: a large offset, a previous-day conversion, and different daylight saving calendars. Australia’s eastern region and the U.S. Pacific region do not switch clocks on the same dates, so there are weeks each year when the difference changes by an extra hour compared with your usual assumption. This affects recurring standups, customer demos, and support escalations, especially for teams in tech, media, logistics, and outsourced operations working across Sydney, Brisbane, Los Angeles, and San Francisco.
Can I use this comparison for travel and flight planning too?
Yes, and it is especially useful for understanding why trans-Pacific itineraries can look unusual on paper. Flights between Sydney or Brisbane and Los Angeles or San Francisco often cross the International Date Line, so a departure in the evening from Australia may appear to arrive in North America earlier on the same calendar date in local time. Using the visual grid helps you verify not just the hour difference but also whether your hotel check-in, airport transfer, or connecting flight lands on the same day or the previous day locally.