PST to UTC Calculator for Convert Time Zones Accurately
PST (Pacific Standard Time) is UTC minus 8 hours. When it's 12:00 noon UTC, it's 4:00 AM PST. To convert PST to UTC, add 8 hours. To convert UTC to PST, subtract 8 hours. This applies from early November through mid-March, when the US West Coast is on standard time.
PST vs PDT: The Seasonal Switch
From mid-March to early November, the US West Coast switches to PDT (Pacific Daylight Time), which is UTC minus 7 hours — one hour ahead of PST. During this period, add 7 hours to convert PDT to UTC, not 8. Many people search for PST to UTC conversion year-round but get the wrong result because they forget about daylight saving time.
PST vs PDT — Don't Mix Them Up
PST (Nov–Mar): UTC − 8 hours
PDT (Mar–Nov): UTC − 7 hours
The US switches clocks on the second Sunday of March and the first Sunday of November.
PST to UTC Conversion Table
Here are common PST times and their UTC equivalents (standard time, UTC−8):
12:00 AM PST = 8:00 AM UTC
Wait — use the table below instead of this format.
Wait — use the table below instead of this format.
12:00 AM PST → 8:00 AM UTC | 6:00 AM PST → 2:00 PM UTC | 9:00 AM PST → 5:00 PM UTC | 12:00 PM PST → 8:00 PM UTC | 3:00 PM PST → 11:00 PM UTC | 6:00 PM PST → 2:00 AM UTC (next day) | 9:00 PM PST → 5:00 AM UTC (next day)
How to Convert PST to UTC Quickly
The fastest mental math: PST + 8 = UTC (winter), PDT + 7 = UTC (summer). If the result is over 24, subtract 24 and add one day.
Example: A meeting at 3:00 PM PST in December — add 8 hours → 11:00 PM UTC same day. Example: A server event logged at 02:00 UTC in July — subtract 7 hours → 7:00 PM PDT the previous day.
Why UTC Is Used Instead of PST
UTC (Coordinated Universal Time) never changes for daylight saving. It's the universal reference used by servers, APIs, databases, and aviation. When a server log shows a timestamp in UTC, you need to know your local offset to understand when the event actually happened in your time zone. PST/PDT is commonly used by tech companies headquartered on the US West Coast (California, Washington, Oregon).
PST to UTC for Common Use Cases
Scheduling international calls: If your team is in London (UTC+0 in winter, UTC+1 in summer) and you're in PST, a 9:00 AM London call is 1:00 AM PST in winter — usually too early. 3:00 PM London = 7:00 AM PST, which works for morning meetings.
API and server timestamps: Most APIs return timestamps in UTC (often labeled as Z or +00:00). To display local time for PST users, subtract 8 hours (or 7 during daylight saving).
Live events and broadcasts: When a streaming event is scheduled at 18:00 UTC, that's 10:00 AM PST in winter or 11:00 AM PDT in summer.
Quick PST ↔ UTC Reference
PST → UTC: Add 8 hours (Nov to Mar)
PDT → UTC: Add 7 hours (Mar to Nov)
UTC → PST: Subtract 8 hours
UTC → PDT: Subtract 7 hours
Frequently Asked Questions
Is PST always UTC-8?
No. PST (Pacific Standard Time) is permanently UTC-8, but the US West Coast only uses PST in winter (approximately November to March). From March to November, clocks move forward to PDT (UTC-7). Most people informally say 'PST' year-round even during daylight saving.
What states use PST?
California, Nevada, Washington, Oregon, and parts of Idaho observe PST/PDT. Arizona does not observe daylight saving time and stays on MST (UTC-7) year-round.
How do I convert PST to UTC in Excel or Google Sheets?
If your PST time is in cell A1 as a decimal (e.g., 0.5 = 12:00 PM), use =A1+(8/24) for UTC in winter. Add (7/24) during daylight saving. Format the result as a time cell.
Does PST observe daylight saving time?
PST itself does not — PST is a fixed offset (UTC-8). What changes is which offset the US West Coast uses. In summer, California and neighboring states switch to PDT (UTC-7). When people say 'PST doesn't observe daylight saving', they mean the time zone label changes, not that clocks don't move.
What is the difference between PST and GMT?
GMT (Greenwich Mean Time) is the same as UTC during winter. PST is UTC-8, so PST is 8 hours behind GMT. When it's 12:00 PM GMT, it's 4:00 AM PST. During British Summer Time (BST), the UK is UTC+1, making PST 9 hours behind.
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