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Time zonesLive · DST-aware

GMT to JST Converter

See the current time in GMT (Greenwich) and JST (Tokyo) side by side, the exact time difference right now, and convert any time between the two zones.

Quick presets

GMT to JST Converter

GMT
Greenwich
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JST
Tokyo
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Uses your browser's built-in, DST-aware time-zone data.

ToolFeather · Intl API

About converting GMT to JST

Greenwich Mean Time (Greenwich) and Japan Standard Time (Tokyo) are in different time zones, so a meeting, call or stream that's convenient in one may be early or late in the other. The clocks above update live and account for daylight saving automatically, so the time difference you see is the real one for today — not a fixed number that goes stale twice a year.

To plan across the two, type a time into the GMT box (or tap a quick preset) and read the JST equivalent, including a "next day" or "previous day" note when the conversion crosses midnight. For any other pair of zones or cities, use the full timezone converter.

GMT vs JST: the time difference through the year

The difference stays the same all year: JST is 9 h ahead of GMT.

PeriodDifference
Oct 23, 2026 – Oct 23, 2027JST 9 h ahead of GMT

Daylight saving

Neither GMT nor JST uses daylight saving, so this conversion never changes.

GMT to JST conversion table

GMTJST
12:00 AM9:00 AM
1:00 AM10:00 AM
2:00 AM11:00 AM
3:00 AM12:00 PM
4:00 AM1:00 PM
5:00 AM2:00 PM
6:00 AM3:00 PM
7:00 AM4:00 PM
8:00 AM5:00 PM
9:00 AM6:00 PM
10:00 AM7:00 PM
11:00 AM8:00 PM
12:00 PM9:00 PM
1:00 PM10:00 PM
2:00 PM11:00 PM
3:00 PM12:00 AM (next day)
4:00 PM1:00 AM (next day)
5:00 PM2:00 AM (next day)
6:00 PM3:00 AM (next day)
7:00 PM4:00 AM (next day)
8:00 PM5:00 AM (next day)
9:00 PM6:00 AM (next day)
10:00 PM7:00 AM (next day)
11:00 PM8:00 AM (next day)

Best time to meet

The two zones

GMT · Greenwich Mean Time

Greenwich Mean Time is UTC+0 all year. It is the base for world time; the UK uses GMT only in winter and switches to BST in summer.

JST · Japan Standard Time

Japan Standard Time is UTC+9 all year. Japan has not used daylight saving since 1951.

Frequently asked questions

6 answers
What is the time difference between GMT and JST?
It's shown live at the top of this page (and it can change with daylight saving). The converter uses the current, DST-aware difference between Greenwich Mean Time and Japan Standard Time, so the time you see is always right for right now.
How do I convert GMT to JST?
Enter a time in the GMT box and the equivalent JST time appears instantly, adjusted for the current offset between the two zones — including a note if it lands on the previous or next day.
Is this GMT to JST converter accurate with daylight saving?
Yes. It uses your browser's built-in time-zone database (the IANA zones behind Greenwich and Tokyo), which tracks daylight-saving changes automatically, so the current times and difference are correct.
What time is it in Tokyo right now?
The live clock above shows the current time in Tokyo (JST), updating every second, alongside GMT.
Does the GMT to JST time difference change?
No. Neither switch changes the gap: JST is 9 h ahead of GMT all year.
What is a good meeting time for GMT and JST?
Standard 9-to-5 office hours don't overlap; early morning in one zone and evening in the other is the usual compromise — see the table on this page.