SGT to PST Converter
Convert time between Singapore Standard Time (SGT) and Pacific Standard Time (PST)
Singapore Standard Time (SGT)
Pacific Standard Time (PST)
Time Difference
Pacific Standard Time (PST) is 0 hours ahead of Singapore Standard Time (SGT)
Select Date
Select Time
Quick Reference
| SGT | PST |
|---|---|
| 10:00 | 19:00 |
| 12:00 | 21:00 |
| 14:00 | 23:00 |
| 16:00 | 01:00 |
| 18:00 | 03:00 |
| 20:00 | 05:00 |
| 22:00 | 07:00 |
| 00:00 | 09:00 |
| 02:00 | 11:00 |
| 04:00 | 13:00 |
| 06:00 | 15:00 |
| 08:00 | 17:00 |
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
About SGT to PST Time Conversion
Converting time between Singapore Standard Time (SGT) and US Pacific Standard Time (PST) is essential for coordinating with the US West Coast during the winter half-year. SGT is UTC+8 year-round, while PST is UTC-8, placing Singapore exactly 16 hours ahead of PST from early November to mid-March. From mid-March to early November the region observes PDT (UTC-7) and the gap shrinks to 15 hours.
This time zone converter uses the IANA timezone database to ensure accurate calculations and automatically handles the PST/PDT switch. Singapore never observes daylight saving, so the seasonal variation in the SGT-Pacific US offset comes entirely from the American side. Whether you're scheduling Singapore-San Francisco business calls during US winter, planning travel, or coordinating with partners in Los Angeles, Seattle or Vancouver, our converter provides reliable results.
Common Use Cases for SGT to PST Conversion
Business & Work
- Scheduling winter meetings between Singapore and San Francisco, Seattle or Los Angeles offices
- Coordinating with Silicon Valley tech partners outside US daylight saving
- Planning conference calls with US West Coast teams during standard time
Personal & Travel
- Planning travel between Singapore and the US West Coast in the winter
- Coordinating with family and friends in California, Oregon, Washington or British Columbia
- Scheduling virtual events bridging Asia and the US West Coast
Time Zone Information
Singapore Standard Time (SGT)
- UTC Offset: UTC+8
- IANA Timezone: Asia/Singapore
- Daylight Saving: No daylight saving time (consistent year-round)
- Major Cities: Singapore
- Coverage: Republic of Singapore
Pacific Standard Time (PST)
- UTC Offset: UTC-8
- IANA Timezone: America/Los_Angeles
- Daylight Saving: Switches to PDT (UTC-7) from second Sunday in March to first Sunday in November
- Major Cities: Los Angeles, San Francisco, San Jose, San Diego, Seattle, Portland, Vancouver
- Coverage: US West Coast and western Canada outside DST
Quick Reference: SGT to PST
Remember: PST is 16 hours behind SGT. From mid-March to early November, the US West Coast is on PDT and the gap shrinks to 15 hours.
Frequently Asked Questions
What is the time difference between SGT and PST?
Singapore Standard Time (SGT) is UTC+8, while US Pacific Standard Time (PST) is UTC-8. SGT is exactly 16 hours ahead of PST. When it is 12:00 PM in Singapore, it is 8:00 PM the previous day in Los Angeles or San Francisco.
When is PST in effect?
PST applies outside US daylight saving — roughly from early November to mid-March. From mid-March to early November the US West Coast shifts to PDT (UTC-7) and the SGT gap shrinks to 15 hours.
Does Singapore observe daylight saving time?
No. Singapore stays on SGT (UTC+8) year-round. Any seasonal shift in the SGT-PST offset is driven by the US West Coast switching between PST and PDT.
What are the best times for SGT-PST business calls?
The SGT-PST offset is large (16 hours) so live overlap is narrow. Singapore late evening (10:00 PM to 12:00 AM SGT) maps to US West Coast morning (6:00 to 8:00 AM PST). For a US West Coast afternoon slot, very early Singapore morning (6:00 to 8:00 AM SGT) reaches 2:00 to 4:00 PM PST.
Which countries or regions use PST?
PST is observed across the US West Coast outside daylight saving — California, Oregon, Washington, parts of Nevada, plus western Canada including Vancouver. Major cities include Los Angeles, San Francisco, San Jose, San Diego, Seattle, Portland and Vancouver.
Which countries or regions use SGT?
Singapore Standard Time is used only in the Republic of Singapore. UTC+8 is shared with Malaysia, Western Australia, Hong Kong, the Philippines and most of mainland China.
Pro Tips
- • PST is 16 hours behind SGT — Singapore noon is 8 PM the previous day in San Francisco.
- • From mid-March to early November the US West Coast is on PDT and the offset shrinks to 15 hours. Refresh recurring invites near the DST transitions.
- • Singapore never observes DST, so all seasonal variation in the offset comes from the US side.
- • Singapore late evening (10:00 PM to 12:00 AM SGT) is the cleanest overlap with US West Coast morning business hours.
- • For a US West Coast afternoon slot, you will need an early Singapore morning call — plan accordingly.
- • Use IANA identifier America/Los_Angeles in calendars to handle the PST/PDT switch automatically.