PST vs AEST Time Difference
See the current hour gap between PST and AEST, how daylight saving changes affect it, and the best times to schedule meetings.
How to Find the Time Difference Between PST and AEST
Open the PST vs AEST converter: Visit https://www.xconvert.com/time-converter/pst-vs-aest to load a comparison grid with PST and AEST already shown on separate rows. This page is useful when you are scheduling a video call between the US West Coast and eastern Australia, such as coordinating with a Sydney customer while your team works in Los Angeles, San Francisco, Seattle, or Vancouver.
Add other cities that matter to your schedule: Click + Add City and search for places like Sydney, Melbourne, and Brisbane on the Australian side, or Los Angeles, San Francisco, and Seattle on the Pacific side. This helps if you work in software, e-commerce, cloud operations, gaming, or logistics, where teams often span California and Australia and need to compare local business hours across multiple offices.
Drag across the grid to select a meeting window: Click Select if needed, then drag across the colored hourly timeline on the PST row to highlight a range in purple, such as 9:00 AM to 11:00 AM PST. That selection shows the matching time in AEST as 3:00 AM to 5:00 AM the next day, which immediately tells you that a normal California morning meeting is outside standard business hours in eastern Australia.
Adjust and export the best overlap: Drag the purple selection by its center to move it, or use the left and right handles to resize until you find a workable slot, such as 4:00 PM to 6:00 PM PST, which maps to 10:00 AM to 12:00 PM AEST the next day. Once selected, use ICS download, Google Calendar, Gmail, Copy to clipboard, or Share link so a distributed team, client, or travel coordinator can receive the exact cross-time-zone schedule without recalculating it manually.
PST vs AEST Offset Explained
PST (Pacific Standard Time) is UTC-8, while AEST (Australian Eastern Standard Time) is UTC+10, so AEST is 18 hours ahead of PST. In practical terms, when it is 9:00 AM PST, it is 3:00 AM AEST the following day. When it is 5:00 PM PST, it is 11:00 AM AEST the next day, which is why late afternoon on the US West Coast often lines up best with the next morning in eastern Australia.
The comparison becomes more complicated because PST is the standard-time version of the US Pacific zone, while parts of eastern Australia may switch seasonally between AEST and AEDT. In the United States, Pacific Time observes daylight saving time from the second Sunday in March to the first Sunday in November, moving from PST (UTC-8) to PDT (UTC-7). In Australia, Queensland stays on AEST year-round, but New South Wales, Victoria, Tasmania, and the ACT usually move from AEST (UTC+10) to AEDT (UTC+11) from the first Sunday in October to the first Sunday in April.
That means the time difference is not always 18 hours in real-world scheduling. It is exactly 18 hours only when you are comparing PST to AEST as standard offsets. If the US West Coast is on PDT and Sydney or Melbourne is still on AEST, the gap becomes 17 hours; if California is on PST and Sydney is on AEDT, the gap becomes 19 hours; and if both sides are on daylight time, PDT vs AEDT is 18 hours again.
This seasonal shift matters for industries that depend on fixed meeting windows, including SaaS support, financial services, media production, and supply-chain coordination between North America and Australia. For example, a support handoff set for 4:00 PM in Los Angeles during US standard time reaches 10:00 AM the next day in Brisbane year-round, but the same handoff may hit 11:00 AM in Sydney during Australian daylight saving time. If you are booking flights, planning webinar times, or coordinating remote engineering teams, checking the exact date on the converter is essential because the date determines whether daylight saving rules are active.
AEST is commonly used in Brisbane, and standard-time comparisons are also relevant when users want a fixed baseline rather than a city-specific daylight rule. Eastern Australia is home to major population and business centers: Sydney has a metropolitan population of over 5 million, Melbourne also exceeds 5 million, and Brisbane has more than 2 million residents. These cities are major hubs for banking, mining services, education, tourism, and Asia-Pacific regional operations, while the US Pacific zone includes major technology and entertainment centers such as Los Angeles, San Francisco, San Jose, Seattle, and Vancouver, making PST/AEST coordination a frequent business need.
Frequently Asked Questions
What is the exact time difference between PST and AEST?
AEST is 18 hours ahead of PST because PST = UTC-8 and AEST = UTC+10. For example, 8:00 AM PST equals 2:00 AM AEST the next day, and 6:00 PM PST equals 12:00 PM AEST the next day. This is the fixed standard-time difference and does not account for daylight saving changes in California or parts of Australia.
Why does the PST to AEST time difference sometimes change during the year?
The difference changes because the US Pacific zone does not stay on PST all year, and some eastern Australian regions do not stay on AEST all year either. The US switches to PDT (UTC-7) from the second Sunday in March until the first Sunday in November, while places such as Sydney and Melbourne switch to AEDT (UTC+11) from the first Sunday in October until the first Sunday in April. As a result, the gap can be 17, 18, or 19 hours depending on the exact date and which city in Australia you mean.
Is Sydney on AEST all year?
No, Sydney is not on AEST all year. Sydney, in New South Wales, uses AEST (UTC+10) during standard time and AEDT (UTC+11) during daylight saving time, typically from the first Sunday in October to the first Sunday in April. If you need a year-round AEST city, Brisbane, Queensland is the better reference because Queensland does not observe daylight saving time.
What is the best meeting time between the US West Coast and eastern Australia?
A common workable overlap is late afternoon in PST and the following morning in AEST, especially for business calls and team handoffs. For example, 4:00 PM PST is 10:00 AM AEST the next day, and 5:00 PM PST is 11:00 AM AEST the next day, which fits normal office hours in Brisbane and often works for Australian client meetings. By contrast, a 9:00 AM PST meeting lands at 3:00 AM AEST the next day, which is usually impractical unless one side is working overnight.
How do I convert PST to AEST on the xconvert grid?
Open the converter page and use the visual rows for PST and AEST rather than typing a time into a field. Click Select, drag across the PST timeline to mark a period in purple, and read the aligned time directly on the AEST row; you can then move the range or resize it with the handles to test alternatives. This is especially useful for comparing several possible meeting windows before sending a calendar invite to colleagues in California and eastern Australia.
Is AEST the same across all of eastern Australia?
No, AEST as an offset is UTC+10, but not every eastern Australian city stays on that offset year-round. Brisbane remains on AEST throughout the year, while Sydney, Melbourne, and Canberra move to AEDT (UTC+11) during daylight saving months. That distinction matters if you are arranging calls with banks in Sydney, universities in Melbourne, or operations teams in Brisbane, because the same US meeting time can map differently depending on the city and season.
When should I use PST vs Pacific Time in scheduling?
Use PST only when you specifically mean standard time, UTC-8, usually during the non-daylight part of the year or when a contract, technical log, or support schedule explicitly references PST. If you mean the broader regional clock used by cities like Los Angeles, San Francisco, and Seattle across the whole year, it is often safer to say Pacific Time because that automatically covers both PST and PDT. This reduces mistakes in cross-border scheduling with Australia, especially around March, October, and November when daylight saving transitions create temporary changes in the offset.