PST to GMT Converter
Convert time between Pacific Standard Time (PST) and Greenwich Mean Time (GMT)
Pacific Standard Time (PST)
Greenwich Mean Time (GMT)
Time Difference
Greenwich Mean Time (GMT) is 0 hours ahead of Pacific Standard Time (PST)
Select Date
Select Time
Quick Reference
| PST | GMT |
|---|---|
| 18:00 | 02:00 |
| 20:00 | 04:00 |
| 22:00 | 06:00 |
| 00:00 | 08:00 |
| 02:00 | 10:00 |
| 04:00 | 12:00 |
| 06:00 | 14:00 |
| 08:00 | 16:00 |
| 10:00 | 18:00 |
| 12:00 | 20:00 |
| 14:00 | 22:00 |
| 16:00 | 00:00 |
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 PST to GMT Time Conversion
Converting time between Pacific Standard Time (PST) and Greenwich Mean Time (GMT) is essential for US West Coast to UK coordination. PST is UTC-8, while GMT is UTC+0, making GMT 8 hours ahead of PST.
This conversion is crucial for international business operations between the US West Coast (California, Washington, Oregon) and the United Kingdom. Whether you're scheduling business meetings, coordinating project deadlines, or planning travel, our accurate IANA-based converter ensures precise timezone calculations.
Common Use Cases for PST to GMT Conversion
Business & Work
- Scheduling US West Coast to UK business meetings
- Coordinating Silicon Valley and London tech operations
- Managing global business operations and deadlines
Personal & Travel
- Planning travel from US West Coast to UK
- Coordinating with UK family and friends from West Coast
- Scheduling virtual events for US West Coast-UK audiences
Time Zone Information
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
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
Quick Reference: PST to GMT
Remember: GMT is always 8 hours ahead of PST
Frequently Asked Questions
What is the time difference between PST and GMT?
Pacific Standard Time (PST) is UTC-8, while Greenwich Mean Time (GMT) is UTC+0. GMT is 8 hours ahead of PST. This means when it's noon (12:00 PM) in PST, it's 8:00 PM (20:00) the same day in GMT.
Does daylight saving time affect PST to GMT conversion?
Yes. During daylight saving time, PST becomes PDT (Pacific Daylight Time), which is UTC-7. Similarly, GMT becomes BST (British Summer Time), which is UTC+1. These transitions happen on different dates, so the time difference can vary between 7 and 9 hours depending on the time of year.
When should I use this PST to GMT converter?
Use this converter when you need to schedule meetings between the US West Coast and the UK, coordinate project deadlines, plan travel, or communicate time-sensitive information across these regions. This is especially useful for international business operations, tech partnerships, and remote team coordination.
What major cities are in PST and GMT timezones?
PST covers major US cities like Los Angeles, San Francisco, Seattle, San Diego, and Portland. GMT covers the UK (London, Edinburgh, Cardiff, Belfast) and Ireland. During daylight saving time, use PDT for the West Coast and BST for the UK.
How do I convert PST to GMT manually?
To convert from PST to GMT, add 8 hours to the PST time. For example, if it's 9:00 AM PST, it would be 5:00 PM GMT the same day. Remember to account for daylight saving time transitions, which can change the difference to 7 or 9 hours.
What's the best time for US West Coast-UK meetings?
The most practical meeting times are typically 8:00 AM - 11:00 AM PST (4:00 PM - 7:00 PM GMT) for late afternoon UK meetings, or 5:00 PM - 6:00 PM PST (1:00 AM - 2:00 AM GMT+1) the next morning for early morning UK meetings. Always confirm local daylight saving time to avoid scheduling conflicts.
Pro Tips
- • GMT is always 8 hours ahead of PST, but remember this changes to 7 hours or 9 hours during daylight saving transitions.
- • The US observes daylight saving from second Sunday in March to first Sunday in November; the UK from last Sunday in March to last Sunday in October.
- • For international business meetings, morning hours (8-11 AM PST) work best as they fall in late afternoon in the UK (4-7 PM GMT).
- • Use 24-hour time format when scheduling across time zones to avoid AM/PM confusion.
- • Tech companies often schedule calls at 8 AM PST (4 PM GMT) as a standard coordination time for US-UK operations.
- • Always verify the current daylight saving time status in both regions before scheduling important meetings or deadlines.