AEST to PST Converter
Convert time between Australian Eastern Standard Time (AEST) and Pacific Standard Time (PST)
Australian Eastern Standard Time (AEST)
Pacific Standard Time (PST)
Time Difference
Pacific Standard Time (PST) is 0 hours ahead of Australian Eastern Standard Time (AEST)
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Select Time
Quick Reference
| AEST | PST |
|---|---|
| 13:00 | 18:00 |
| 15:00 | 20:00 |
| 17:00 | 22:00 |
| 19:00 | 00:00 |
| 21:00 | 02:00 |
| 23:00 | 04:00 |
| 01:00 | 06:00 |
| 03:00 | 08:00 |
| 05:00 | 10:00 |
| 07:00 | 12:00 |
| 09:00 | 14:00 |
| 11:00 | 16:00 |
Top 10 Most Common Time Zones
| Abbreviation | Full Name | UTC Offset | Typical Use |
|---|---|---|---|
| UTC | Coordinated Universal Time | UTC ±0 | Global reference standard (servers, logs, APIs) |
| EST / EDT | Eastern (US) Time | UTC −5 / −4 | New York, Toronto — North American business hub |
| CST / CDT | Central (US) Time | UTC −6 / −5 | Chicago, Dallas — US central business region |
| PST / PDT | Pacific (US) Time | UTC −8 / −7 | San Francisco, Los Angeles — tech industry standard |
| GMT / BST | Greenwich Mean / British Summer Time | UTC 0 / +1 | UK, used globally as a reference with UTC |
| CET / CEST | Central European (Summer) Time | UTC +1 / +2 | Paris, Berlin, Amsterdam — EU business core |
| IST | India Standard Time | UTC +5:30 | India — major IT & outsourcing region |
| CST | China Standard Time | UTC +8 | Beijing, Shanghai — East Asia business hub |
| JST | Japan Standard Time | UTC +9 | Tokyo — finance & tech hub |
| AEST / AEDT | Australian Eastern (Daylight) Time | UTC +10 / +11 | Sydney, Melbourne — APAC regional business |
Why Time Zone Abbreviations Are Ambiguous
Unlike standardized identifiers (like America/New_York or Europe/London from the IANA tz database), abbreviations such as "CST" or "IST" are not globally unique. They can refer to different time zones depending on context — country, region, or even time of year (due to daylight saving time).
Common Ambiguous Time Zone Abbreviations
| Abbrev. | Common Meaning(s) | UTC Offset | Region(s) |
|---|---|---|---|
| CST | Central Standard Time / China Standard Time / Cuba Standard Time | UTC−6 / UTC+8 / UTC−5 | North America, China, Cuba |
| IST | Indian Standard Time / Irish Standard Time / Israel Standard Time | UTC+5:30 / UTC+1 / UTC+2 | India, Ireland, Israel |
| AST | Atlantic Standard Time / Arabia Standard Time | UTC−4 / UTC+3 | Caribbean, Canada, Middle East |
| PST | Pacific Standard Time / Philippine Standard Time | UTC−8 / UTC+8 | North America, Philippines |
| EST | Eastern Standard Time (North America / Australia) | UTC−5 / UTC+10 | North America, Australia |
✅ Best Practice
To avoid ambiguity, always:
- Use IANA tz identifiers — e.g.,
America/New_Yorkinstead of "EST" - Specify UTC offset explicitly — e.g.,
UTC−5when abbreviations must be used - Include the full timezone name — e.g., "Eastern Standard Time (EST)" with UTC offset
Related Time Zone Conversions
About AEST to PST Time Conversion
Converting time between Australian Eastern Standard Time (AEST) and Pacific Standard Time (PST) is essential for Australia to US West Coast coordination. AEST is UTC+10 while PST is UTC-8, making PST 18 hours behind AEST (or AEST 18 hours ahead of PST). The US West Coast observes daylight saving time, so the actual difference varies between 18 hours (when PST is active) and 17 hours (when PDT is active from mid-March to early November). Australia does not observe daylight saving time during winter (AEST period), so AEST remains constant during this season.
This conversion is crucial for business operations between Australia and the US West Coast. Whether you're scheduling international meetings between Sydney and Los Angeles/San Francisco, managing customer service operations, coordinating with Australian business partners, or planning travel, our accurate IANA-based converter ensures precise timezone calculations accounting for seasonal daylight saving changes.
Common Use Cases for AEST to PST Conversion
Business & Work
- Scheduling Australia to US West Coast business meetings
- Coordinating Sydney and Silicon Valley tech operations
- Managing global business operations between Australia and US West Coast
Personal & Travel
- Planning travel from Australia to US West Coast
- Coordinating with US family and friends from Australia
- Scheduling virtual events for Australia-US audiences
Time Zone Information
Australian Eastern Standard Time (AEST)
- UTC Offset: UTC+10
- IANA Timezone: Australia/Sydney
- Daylight Saving: None - AEST is standard time (winter months)
- Major Cities: Sydney, Melbourne, Brisbane, Canberra, Newcastle
- Coverage: Eastern Australia
Pacific Standard Time (PST)
- UTC Offset: UTC-8
- IANA Timezone: America/Los_Angeles
- Daylight Saving: First Sunday in November to Second Sunday in March
- Major Cities: Los Angeles, San Francisco, Seattle, Portland, San Diego
- Coverage: Pacific Coast of United States and Canada
Quick Reference: AEST to PST
Remember: PST is always 18 hours behind AEST, but becomes 17 hours behind when PDT is active (daylight saving time in US)
Frequently Asked Questions
What is the time difference between AEST and PST?
Australian Eastern Standard Time (AEST) is UTC+10, while Pacific Standard Time (PST) is UTC-8. AEST is 18 hours ahead of PST. This means when it's 8:00 AM in AEST, it's 2:00 PM the previous day in PST.
Does the US West Coast observe daylight saving time?
Yes, the US West Coast observes daylight saving time. Pacific Standard Time (PST) transitions to Pacific Daylight Time (PDT, UTC-7) from mid-March to early November. Australia does not observe daylight saving time during winter (AEST period). This means the time difference varies between 18 hours (when PST is active) and 17 hours (when PDT is active).
What is the time difference during Pacific Daylight Time (PDT)?
When the US West Coast observes Pacific Daylight Time (PDT, UTC-7) from mid-March to early November, the difference becomes 17 hours. During this period, when it's 8:00 AM AEST, it would be 3:00 PM PDT the previous day. This is why it's important to verify whether PST or PDT is currently active.
What major cities are in AEST and PST timezones?
AEST covers major Australian cities including Sydney, Melbourne, Brisbane, Canberra, and Newcastle in eastern Australia. PST covers major US West Coast cities like Los Angeles, San Francisco, Seattle, Portland, and San Diego.
How do I convert AEST to PST manually?
To convert from AEST to PST, subtract 18 hours from the AEST time. For example, if it's 6:00 PM AEST, subtract 18 hours to get 12:00 PM (noon) PST the previous day. Remember that the difference becomes 17 hours when the US West Coast observes PDT (daylight saving time).
What should I know about scheduling across AEST and PST?
Australia is 17-18 hours ahead of the US West Coast, with very limited overlap. Morning AEST times (8-10 AM) correspond to afternoon PST times (2-4 PM previous day), while afternoon AEST (2-4 PM) corresponds to very early morning PST (2-4 AM same day). Evening AEST (6-8 PM) aligns with late morning PST (12-2 PM same day), offering good opportunities for real-time collaboration.
Pro Tips
- • PST is always 18 hours behind AEST - but becomes 17 hours behind when PDT is active (March-November).
- • The US West Coast observes daylight saving time, shifting from PST (UTC-8) to PDT (UTC-7), while Australia remains on AEST year-round during winter.
- • Evening AEST (6-8 PM) equals late morning/afternoon PST (12-2 PM same day), providing the best time overlap for business meetings.
- • Morning AEST (8-10 AM) equals afternoon PST (2-4 PM previous day), making synchronous meetings challenging unless West Coast partners stay up late.
- • Use 24-hour time format when communicating across AEST-PST to eliminate AM/PM confusion and handle day transitions clearly.
- • Between March and November, remember the 17-hour difference when PST transitions to PDT due to US daylight saving time.