Convert PST to AEST
See the 18-hour time difference between PST and AEST, compare hours side by side, and plan calls or meetings across both zones.
How to Convert PST to AEST
Open the PST to AEST converter: Go to https://www.xconvert.com/time-converter/pst-to-aest-converter to load a visual comparison grid with PST and AEST already set up as the main time zones. This page is useful when you are planning a call between California and Australia, coordinating a software release with a Sydney-based team, or checking whether a Los Angeles support shift overlaps with Brisbane business hours.
Add comparison cities relevant to your schedule: Click “+ Add City” and add cities such as Los Angeles, Sydney, and Brisbane if you want city-based context for West Coast US and eastern Australia operations. This is especially helpful for industries like SaaS, gaming, cloud infrastructure, and media, where teams in San Francisco, Seattle, Sydney, and Brisbane often need to coordinate product launches, customer support coverage, or ad campaign handoffs.
Drag across the grid to select a meeting window: Click “Select” to enter selection mode, then drag across the PST row to highlight a time block, such as 4 PM to 6 PM PST. On standard-time alignment, that corresponds to 10 AM to 12 PM AEST the next day, which is one of the most practical windows for live meetings because it lands in late afternoon on the US West Coast and late morning in eastern Australia.
Export and share the selected time range: After selecting the range, use the export options that appear — ICS download, Google Calendar, Gmail, Copy to clipboard, or Share link — to send the exact cross-time-zone slot to clients or teammates. For example, a distributed engineering team can download the ICS file so the meeting appears correctly in each member’s local calendar, while a recruiter or account manager can use the Gmail or Share link option to confirm interview times with candidates in Australia.
Understanding the PST to AEST Time Difference
PST (Pacific Standard Time) is UTC-8, while AEST (Australian Eastern Standard Time) is UTC+10, so AEST is 18 hours ahead of PST. That means when it is 9:00 AM PST, it is 3:00 AM AEST the next day. The date difference matters as much as the clock difference, because many PST-to-AEST conversions move into the following calendar day in Australia.
The difference does not stay fixed all year if the US side switches to daylight saving time. In the United States, Pacific Time changes from PST to PDT (UTC-7) on the second Sunday in March and returns to PST on the first Sunday in November; during that period, the gap between the US West Coast and AEST becomes 17 hours instead of 18. Australia’s AEST itself does not observe daylight saving time, but some eastern Australian cities such as Sydney and Melbourne switch to AEDT (UTC+11) from the first Sunday in October to the first Sunday in April, while Brisbane stays on AEST year-round.
This seasonal shift is important for real scheduling. If you are coordinating with Brisbane, the offset is 18 hours when the US is on PST and 17 hours when the US is on PDT. If you are actually meeting with Sydney or Melbourne, the practical difference may be 19 hours, 18 hours, or 17 hours depending on whether the US and Australia are each on standard time or daylight time, so checking the exact date on the converter is essential before booking flights, webinars, or recurring meetings.
Best Times for Calls and Meetings Between PST and AEST
Because AEST is far ahead of PST, the best overlap usually happens during the late afternoon or evening in PST and the morning in AEST the next day. A reliable example during standard time is 4:00 PM to 6:00 PM PST = 10:00 AM to 12:00 PM AEST the next day. This window works well for cross-border teams in software, digital marketing, logistics, and customer success because it stays within normal office hours in Australia while remaining manageable for West Coast US staff before the end of the business day.
Another practical option is 3:00 PM to 5:00 PM PST = 9:00 AM to 11:00 AM AEST the next day. This is often the best slot for standups, project reviews, and sales calls because Australian teams start their day with fresh availability, while US teams can still complete follow-up tasks before signing off. For companies with operations in Los Angeles, San Francisco, Seattle, Brisbane, or regional Queensland, this pattern supports daily handoffs between product, support, and operations teams.
Early morning PST is usually poor for live collaboration with AEST. For example, 9:00 AM PST = 3:00 AM AEST the next day, and 11:00 AM PST = 5:00 AM AEST the next day, which falls well outside standard business hours in Australia. That means a typical US morning meeting almost always forces Australian participants into overnight or pre-dawn attendance, so recurring meetings should usually be anchored to the US afternoon instead.
If the US side is on PDT instead of PST, the overlap shifts slightly earlier for Australia because the gap narrows by one hour. In that season, 4:00 PM PDT = 9:00 AM AEST the next day, making 4 PM to 6 PM on the US West Coast especially effective for collaboration with Brisbane-based teams. This matters for sectors with daily international coordination, including cloud services, mining supply chains, education, and e-commerce support, where even a one-hour shift can affect whether a meeting lands inside core office hours.
Frequently Asked Questions
What is the time difference between PST and AEST?
AEST is 18 hours ahead of PST when both zones are on standard time. Since PST is UTC-8 and AEST is UTC+10, you add 18 hours to convert PST to AEST, and the result often lands on the next calendar day in Australia.
When is 9 AM PST in AEST?
9:00 AM PST is 3:00 AM AEST the next day. This is why morning meetings in California or other PST locations are usually not practical for teams in eastern Australia, especially if the participants are working standard office hours in Brisbane or similar AEST locations.
Does the difference between PST and AEST change during daylight saving time?
Yes, the difference changes when the US Pacific zone moves from PST to PDT. During US daylight saving time — from the second Sunday in March to the first Sunday in November — the gap between Pacific Time and AEST becomes 17 hours instead of 18, because AEST remains at UTC+10 year-round.
What is the best meeting time between PST and AEST?
The best live meeting window is usually late afternoon in PST and mid-morning the next day in AEST. A strong example is 4:00 PM to 6:00 PM PST = 10:00 AM to 12:00 PM AEST, which gives Australian participants a normal workday slot and allows US teams to meet before the end of their business day.
Why does PST to AEST conversion often move to the next day?
The conversion crosses a very large offset, with AEST sitting 18 hours ahead of PST in standard time. Because of that, even a midday or afternoon time in California usually becomes an early-morning or next-day time in eastern Australia, which is critical when booking interviews, flights, support shifts, or project deadlines.
Is AEST the same as Sydney time?
Not always. AEST is UTC+10 and applies year-round in places like Brisbane, Queensland, but Sydney observes daylight saving time and switches to AEDT (UTC+11) from the first Sunday in October to the first Sunday in April. If your meeting is specifically with Sydney rather than a general AEST location, you should verify the exact date because Sydney may be one hour ahead of AEST.
How do I quickly schedule a recurring call between California and eastern Australia?
Use the visual grid on the converter page to test a recurring slot such as 4 PM PST, then move the date picker across different months to see how daylight saving changes affect the Australian side. This is especially useful for remote teams in software development, finance operations, and customer support, because a meeting that works in January may shift by an hour in March or November when the US changes between PST and PDT.