JST to PST Converter

Category: Time Zone Converters

- June 29, 2025

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Japan Standard Time (JST)

UTC+9 • Tokyo, Osaka, Yokohama

Conversion Settings

Configure your timezone conversion preferences

Auto Convert

Daylight Saving Aware

Show UTC Offset

Show Seconds

Pacific Time (PDT/PST)

UTC-7/-8 • Los Angeles, Seattle, San Francisco

--:--:--

Select a time to convert

Time Difference: --

UTC Offset (JST): +09:00

UTC Offset (PST): -08:00

DST Status: --

JST Time: --

PST Time: --

Time Format:

Current JST: --:--:--

Current PST: --:--:--

🌏 JST is Japan Standard Time (UTC+9) and PST is Pacific Time (PDT/PST). Time difference varies between 16-17 hours depending on US daylight saving.

JST to PST Conversion Guide

What is JST to PST Conversion?

JST to PST conversion helps you translate time between Japan Standard Time and Pacific Time zones. JST is UTC+9 and never changes for daylight saving time. PST includes PDT (UTC-7) during summer and PST (UTC-8) during winter. The time difference varies between 16-17 hours, with JST being ahead and crossing the international date line.

Time Zone Information

Japan Standard Time (JST): UTC+9, used throughout Japan including Tokyo, Osaka, Yokohama, and Sapporo. Never observes daylight saving time.

Pacific Time (PST): Used in Western US and Canada (Los Angeles, Seattle, San Francisco, Vancouver). PDT (UTC-7) in summer, PST (UTC-8) in winter.

Time Difference: JST is 16 hours ahead of PDT, or 17 hours ahead of PST. The large difference means JST is often the next calendar day.

Daylight Saving Time Impact

JST Consistency: Japan never observes daylight saving time, so JST remains UTC+9 year-round

US Pacific DST: Pacific Time changes between PDT (UTC-7) in summer and PST (UTC-8) in winter

Variable Difference: Time difference changes between 16 hours (JST vs PDT) and 17 hours (JST vs PST)

Common Conversion Examples

Business Hours (Summer)

JST 9:00 AM → PDT 5:00 PM (previous day)

JST 6:00 PM → PDT 2:00 AM (same day)

16-hour difference during US summer

Business Hours (Winter)

JST 9:00 AM → PST 4:00 PM (previous day)

JST 6:00 PM → PST 1:00 AM (same day)

17-hour difference during US winter

Meeting Planning

Best JST Time: 10:00 PM - 11:00 PM

Converts to PST: 6:00 AM - 7:00 AM

Very challenging overlap window

Date Line Crossing

JST Monday 2:00 AM → PST Sunday 9:00 AM

JST Friday 11:00 PM → PST Friday 6:00 AM

JST often shows next calendar day

Conversion Tips & Best Practices

• Largest practical time difference (16-17 hours) - JST is almost a full day ahead

• JST never changes for daylight saving, but Pacific Time does, affecting the time difference

• Very limited business hours overlap - meetings require early morning or late evening times

• International date line effect: JST Monday morning equals PST Sunday evening

• Summer (PDT): JST is 16 hours ahead. Winter (PST): JST is 17 hours ahead

• Always double-check the date when converting - it's often the previous day in Pacific Time

Convert Between JST and PST

If you've ever tried to set up a call between Tokyo and Los Angeles, you know the math gets tricky fast. This time converter helps you jump over that hassle. It takes any date and time in Japan Standard Time (JST) or Pacific Time (PST/PDT) and instantly shows you the matching time in the other zone. It's built with thoughtful details like daylight saving awareness and auto-conversion that make it genuinely helpful, not just another clock with extra buttons.

Why this tool is worth your bookmark

Whether you're planning a meeting, catching a livestream, or trying not to text someone at 3:00 AM, this calculator keeps your timing clean. Instead of guessing how many hours ahead or behind you are (and risking the embarrassment), it gives you exact results every time. It even helps you double-check how daylight saving changes the math.

How it works, step by step

Start with your time and location

Pick the timezone you're starting from, either JST or PST, using the dropdown near the top. Then set your date and time using the calendar and clock fields. If you're converting right now, you can just tap the Now button to instantly pull in the current time from your chosen zone.

Convert, swap, or reset

Click the Convert Time button to run the conversion. The result shows up right below, with the converted time, matching date, and whether daylight saving applies. Need to switch directions (say, from PST to JST)? Hit Swap and everything flips accordingly. To start fresh, there's a Reset button that brings back default values and resets your timezone pick.

Built-in smarts that do more than just math

Auto convert as you type

If the Auto Convert box is checked, the tool updates the output instantly whenever you change the date or time. No need to press a button.

Handles daylight saving automatically

Daylight saving time throws off a lot of conversions. This tool adjusts for it based on US rules—when you're converting during summer, Pacific Time shifts to PDT (UTC-7). In winter, it flips back to PST (UTC-8). You can turn off daylight saving awareness if you want, but keeping it on avoids surprises.

Extra display settings

Show UTC Offset: Adds the UTC offset next to each timezone for extra clarity.
Show Seconds: Displays seconds in the time fields. Helpful for precise scheduling.
12/24 Hour Format: Toggle between AM/PM and military-style time.

Example: Meeting across the Pacific

Imagine you’re based in San Francisco and trying to plan a meeting with someone in Osaka. You want to schedule it at 3:00 PM PST on a Tuesday in December. Plug that in and you'll see it becomes 8:00 AM JST the next day. With the time difference stretching across the international date line, it’s easy to lose track of which day you're actually coordinating. This calculator handles that smoothly.

Answers to the usual head-scratchers

Why does the date change?

JST is up to 17 hours ahead of PST, depending on the season. That means a late evening in Japan might still be early morning in California, sometimes even the previous day.

Can I convert from PST to JST too?

Yes. Just use the Swap button or select Pacific Time as the input zone. The tool flips everything, including labels and descriptions.

What if I just want to see the current time?

Live clocks for both time zones are built in. They update every second so you can glance at the top-right section and see what time it is in both regions without doing anything.

Stay on schedule across time zones

Time differences shouldn't trip you up. Whether you're arranging interviews, running international teams, or trying to catch a stream from Tokyo, this converter helps you get it right the first time. It cuts through confusion and gives you the answer you need, with no guesswork. Simple, reliable, and ready when you are.