JST to GMT Time Zone Converter — Japan to Greenwich

Convert between any time zones worldwide. Free and accurate time zone converter with DST support.

Edit time or date on either side — all cards update instantly.

From

UTC...

Japan Standard Time

To Same day

UTC...

Greenwich Mean Time

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Upcoming clock change (daylight saving)

To (Greenwich Mean Time): Next DST change: October 25, 2026 — BST shifts to GMT (UTC+0)

JST to GMT Conversion Chart

Last updated: April 2026

Today's reference — every 3 hours. DST is applied automatically.

JST Time	GMT Time
12:00 AM	4:00 PM (-1 day)
3:00 AM	7:00 PM (-1 day)
6:00 AM	10:00 PM (-1 day)
9:00 AM	1:00 AM
12:00 PM	4:00 AM
3:00 PM	7:00 AM
6:00 PM	10:00 AM
9:00 PM	1:00 PM

Popular Timezone Conversions

CST to EST PST to EST MST to EST GMT to EST JST to EST GST to EST IST to EST EST to GMT

About JST to GMT Conversion

Last updated: April 2026

Converting time between JST and GMT requires understanding their time zone offsets and any daylight saving time adjustments. JST (JST) operates at UTC+9, while GMT (GMT) is set to UTC+1. This means GMT is 8 hours behind JST. For example, when it's 9:59 PM JST on May 5, 2026, it's 1:59 PM GMT in GMT. Europe/London observes daylight saving time, switching between GMT (UTC+0) and BST (UTC+1), while Asia/Tokyo does not observe daylight saving time. Use this converter to quickly find the equivalent time in GMT for any time in JST, whether you're scheduling meetings, planning travel, or coordinating with teams across different time zones.

How to Use the Time Zone Converter

Last updated: April 2026

Select your source timezone from the "From timezone" dropdown (use search to find quickly)
Enter the date and time you want to convert (or click "Today" and "Now" for current time)
Select your target timezone from the "To timezone" dropdown
The conversion updates automatically as you change inputs - no button needed!
Use "Copy" button to copy the converted time, or use presets for quick conversions

More Conversions from JST

JST to EST JST to CST JST to MST JST to MDT JST to PST JST to AKST JST to HST JST to CET JST to EET JST to MSK JST to IST JST to CST-CHINA JST to HKT JST to SGT JST to GST JST to AEST JST to AWST JST to NZST JST to UTC JST to ART JST to BRT JST to PHT JST to BDT JST to KST JST to SAST JST to ICT JST to EAT JST to WAT JST to PKT

Frequently Asked Questions

Last updated: April 2026

What is the time difference between JST and GMT?

The time difference between JST and GMT is 8 hours. GMT is 8 hours behind JST.

Is GMT ahead of or behind JST?

GMT is behind JST by 8 hours. When it's 9 AM in JST, it's 1:00 AM in GMT.

How many hours do you add to JST to get GMT?

You subtract 8 hours from JST to get GMT. For example, 9 AM JST - 8 hours = 1:00 AM GMT.

Does the JST to GMT time difference change during Daylight Saving Time?

Yes, the time difference can change during Daylight Saving Time (DST). GMT observes DST, which can affect the time difference during the transition periods in spring and fall.

What is 9 AM JST in GMT?

9 AM JST is 1:00 AM GMT. This conversion accounts for the 8-hour time difference between the two timezones.

Is JST the same throughout the year when converting to GMT?

No, the conversion between JST and GMT can vary during the year due to Daylight Saving Time. The time difference may change by 1 hour during DST transition periods (typically March and November), so always use a current timezone converter for accurate conversions.

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