🕒 PST to EST Converter: Pacific Time to Eastern Time

What is the PST to EST Converter?

Pacific Time and Eastern Time are two of the four main time zones used across the contiguous United States, and they sit exactly 3 time zones apart. Eastern Time runs the clocks forward first, so when it is 9:00 AM on the US East Coast, it is still 6:00 AM on the West Coast. That 3-hour gap is the single fact this whole conversion rests on: to go from Pacific to Eastern, add 3 hours; to go the other way, subtract 3 hours.

What trips people up is daylight saving time. The United States does not keep one fixed offset from UTC all year. Pacific Standard Time (PST) is UTC minus 8 hours, but for most of the year the West Coast actually runs on Pacific Daylight Time (PDT), which is UTC minus 7 hours. Eastern Standard Time (EST) is UTC minus 5 hours, while Eastern Daylight Time (EDT) is UTC minus 4 hours. The good news is that the switch happens on the same two Sundays for both zones under the Uniform Time Act, so PST pairs with EST and PDT pairs with EDT, and the difference between the two coasts never changes: it is always 3 hours, every day of the year.

That is why a converter that only subtracts a fixed number is risky twice a year, right around the March and November clock changes, and why this tool instead reads the actual time zone rules for America/Los_Angeles and America/New_York using the browser Intl.DateTimeFormat API. It asks each zone what its current UTC offset is for the exact moment you entered, rather than assuming PST or EST applies year round. That handles the transition weeks correctly and also means the tool keeps working automatically if either zone rule ever changes.

In practice, most people reach for a PST to EST converter to schedule a call, a livestream, a flight connection, or a deadline across the country. Because the offset is a flat 3 hours in both directions, mental math works fine for most people once they remember the direction: Eastern is ahead, so Pacific morning meetings land in the early afternoon back East, and an Eastern end-of-day deadline is still mid-afternoon on the West Coast.

When to use it

• Scheduling a meeting, webinar, or call between a West Coast team (Los Angeles, San Francisco, Seattle) and an East Coast team (New York, Boston, Miami, Atlanta).
• Working out what time a Pacific Time livestream, product launch, or market open lands in Eastern Time for East Coast viewers.
• Converting a flight departure or connection time when traveling between the US West Coast and East Coast.
• Checking a deadline, store hours, or customer support window that is quoted in one zone against your own Pacific or Eastern schedule.

How to use the PST to EST Converter

1. Enter the Pacific Time date and time you want to convert, or click "Use current Pacific time" to load the current moment automatically.
2. Read the Eastern Time result at the top of the tool. It already accounts for whether PST/EST or PDT/EDT applies on that date.
3. Check the zone labels under each time to confirm whether the result fell in standard time or daylight time.
4. Use the Copy button to grab the Eastern Time result for pasting into an email, calendar invite, or message.

Formula & method

Worked examples

Quick PST/PDT to EST/EDT reference for common meeting times

UTC offsets behind the PST to EST conversion

Common mistakes to avoid

• Assuming PST always applies on the West Coast. For most of the year the West Coast actually runs on PDT (Pacific Daylight Time), not PST. Casually saying "PST" is common shorthand, but a precise conversion should use PDT to EDT during daylight saving months (mid March to early November).
• Using a fixed 3-hour subtraction without checking the calendar. The 3-hour gap itself never changes, but the labels do. If you subtract 3 hours from an Eastern time near a clock-change weekend without confirming which zone label applies, you can still get the hour right but describe it with the wrong abbreviation.
• Forgetting the date can roll over. Because Eastern Time is ahead, a late evening Pacific time (for example 9:30 PM PST) becomes past midnight the next calendar day in Eastern Time. Double check the date, not just the hour, for late-night conversions.
• Mixing up the direction of the offset. Eastern Time is ahead of Pacific Time, so converting from Pacific to Eastern means adding hours, not subtracting. Subtracting is only correct when converting the other way, from Eastern back to Pacific.

Glossary

PST (Pacific Standard Time)

The standard, non-daylight-saving time zone on the US West Coast, 8 hours behind UTC (UTC-8). In effect roughly from early November to mid March.

PDT (Pacific Daylight Time)

The daylight saving version of Pacific Time, 7 hours behind UTC (UTC-7). In effect roughly from mid March to early November.

EST (Eastern Standard Time)

The standard, non-daylight-saving time zone on the US East Coast, 5 hours behind UTC (UTC-5). In effect roughly from early November to mid March.

EDT (Eastern Daylight Time)

The daylight saving version of Eastern Time, 4 hours behind UTC (UTC-4). In effect roughly from mid March to early November.

IANA time zone database

The standard reference database (identifiers like America/Los_Angeles and America/New_York) that browsers and operating systems use to know a location's exact UTC offset and daylight saving rules for any date.

Daylight saving time (DST)

The practice of moving clocks forward by 1 hour in spring and back in autumn. Because Pacific and Eastern zones follow the same US schedule, DST shifts both clocks together and the 3-hour gap between them stays constant.

Frequently asked questions