JST to GMT Time Zone Converter Japan to Greenwich

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

Quick converter

JST

Tue, 04 Aug 2026

UTC+9

GMT

Mon, 03 Aug 2026

UTC+0

GMT is 9 hours behind JST

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All timezones in sync. Click any slot to pin it.

Work hours (9 am to 6 pm) Night (10 pm to 6 am) Pinned / now

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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 operates at UTC+9, while GMT is set to UTC+0. This means GMT is 9 hours behind JST. Note that due to the time difference, the date may change. When it's 7:14 AM JST on August 4, 2026, it's 10:14 PM GMT on August 3, 2026. 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 MST JST to PST JST to CET JST to HKT JST to GST JST to AEST JST to KST 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 9 hours. GMT is 9 hours behind JST.

Is GMT ahead of or behind JST?

GMT is behind JST by 9 hours. When it's 9 AM in JST, it's 12:00 AM in GMT.

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

You subtract 9 hours from JST to get GMT. For example, 9 AM JST - 9 hours = 12:00 AM GMT.

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

No, the time difference between JST and GMT remains constant throughout the year. Neither timezone observes Daylight Saving Time, so the 9-hour difference stays the same.

What is 9 AM JST in GMT?

9 AM JST is 12:00 AM GMT. This conversion accounts for the 9-hour time difference between the two timezones.

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

Yes, the conversion between JST and GMT remains consistent throughout the year. Since neither timezone observes Daylight Saving Time, the 9-hour difference is constant, making conversions predictable and straightforward.

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