GMT to PST Converter
Convert time between Greenwich Mean Time (GMT) and Pacific Standard Time (PST)
Greenwich Mean Time (GMT)
Pacific Standard Time (PST)
Time Difference
Pacific Standard Time (PST) is 0 hours ahead of Greenwich Mean Time (GMT)
Select Date
Select Time
Quick Reference
| GMT | PST |
|---|---|
| 02:00 | 18:00 |
| 04:00 | 20:00 |
| 06:00 | 22:00 |
| 08:00 | 00:00 |
| 10:00 | 02:00 |
| 12:00 | 04:00 |
| 14:00 | 06:00 |
| 16:00 | 08:00 |
| 18:00 | 10:00 |
| 20:00 | 12:00 |
| 22:00 | 14:00 |
| 00:00 | 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 GMT to PST Time Conversion
Converting time from Greenwich Mean Time (GMT) to Pacific Standard Time (PST) is essential for UK to US West Coast coordination. GMT is UTC+0, while PST is UTC-8, making PST 8 hours behind GMT.
This conversion is crucial for international business operations between the United Kingdom and the US West Coast, including tech hubs in California, Washington, and Oregon. Whether you're scheduling meetings, coordinating project deadlines, or planning travel, our accurate IANA-based converter ensures you never miss the time difference.
Common Use Cases for GMT to PST Conversion
Business & Work
- Scheduling UK to US West Coast business meetings
- Coordinating London and Silicon Valley tech operations
- Managing global supply chain operations across time zones
Personal & Travel
- Planning travel from UK to US West Coast (California, Washington)
- Coordinating with US West Coast family and friends from UK
- Scheduling virtual events for UK-US West Coast audiences
Time Zone Information
Greenwich Mean Time (GMT)
- UTC Offset: UTC+0 (UTC+1 during BST)
- IANA Timezone: Europe/London
- Daylight Saving: Last Sunday in March to Last Sunday in October
- Major Cities: London, Edinburgh, Cardiff, Belfast, Dublin
- Coverage: United Kingdom and Ireland
Pacific Standard Time (PST)
- UTC Offset: UTC-8 (UTC-7 during PDT)
- IANA Timezone: America/Los_Angeles
- Daylight Saving: Second Sunday in March to First Sunday in November
- Major Cities: Los Angeles, San Francisco, Seattle, Portland, San Diego
- Coverage: Pacific Coast of United States and Canada
Quick Reference: GMT to PST
Remember: PST is always 8 hours behind GMT
Frequently Asked Questions
What is the time difference between GMT and PST?
GMT (Greenwich Mean Time) is 8 hours ahead of PST (Pacific Standard Time). When it is noon (12:00 PM) in GMT, it is 4:00 AM in PST. This difference remains consistent because both regions adjust for daylight saving time at approximately the same periods.
How do I quickly calculate GMT to PST conversion?
Simply subtract 8 hours from the GMT time to get PST. For example: 8:00 PM GMT minus 8 hours equals 12:00 PM (noon) PST. If the result is negative or crosses midnight, you'll need to adjust to the previous day.
Does daylight saving time affect GMT to PST conversion?
GMT itself doesn't observe daylight saving time, but the UK (where GMT is based) changes to BST (British Summer Time, UTC+1) in summer. Meanwhile, PST changes to PDT (Pacific Daylight Time, UTC-7). During these periods, the time difference may shift by 1 hour. Our converter automatically handles these changes.
When should I use this GMT to PST converter?
Use this converter when scheduling international calls, planning business meetings, arranging travel, coordinating projects, or communicating with people in both the UK and US West Coast regions. It's particularly useful for tech companies operating between London and Silicon Valley.
Is GMT the same as UTC?
GMT (Greenwich Mean Time) and UTC (Coordinated Universal Time) are essentially the same in practical terms for timekeeping purposes. Both are based on the Prime Meridian in Greenwich, London. However, GMT is an older standard while UTC is the modern international standard used for scientific and technical applications.
What cities are in PST timezone?
PST covers the US Pacific Coast, including major cities like Los Angeles, San Francisco, Seattle, Portland, San Diego, Las Vegas, and Phoenix. In Canada, it includes Vancouver and parts of British Columbia. In Mexico, it applies to Baja California.
Pro Tips
- • When scheduling early morning meetings with GMT colleagues, remember PST is 8 hours behind—8 AM GMT is midnight PST.
- • Use online calendars with timezone support to automatically show meeting times in both GMT and PST.
- • Peak overlap hours are typically 8 AM-12 PM PST / 4 PM-8 PM GMT for convenient business communication.
- • Double-check meeting times when daylight saving time transitions occur in March and November.
- • For recurring meetings, consider rotating times to fairly distribute inconvenient hours between teams.
- • Always specify "GMT" or "PST" when scheduling to avoid confusion with other similar-sounding timezones.
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