ToolFeather
Time zonesLive · DST-aware

JST to GMT Converter

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

Quick presets

JST to GMT Converter

JST
Tokyo
—
GMT
Greenwich
—

—

Uses your browser's built-in, DST-aware time-zone data.

ToolFeather · Intl API

About converting JST to GMT

Japan Standard Time (Tokyo) and Greenwich Mean Time (Greenwich) 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 JST box (or tap a quick preset) and read the GMT 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.

JST vs GMT: the time difference through the year

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

PeriodDifference
Oct 23, 2026 – Oct 23, 2027GMT 9 h behind JST

Daylight saving

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

JST to GMT conversion table

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

Best time to meet

The two zones

JST · Japan Standard Time

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

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.

Frequently asked questions

6 answers
What is the time difference between JST and GMT?
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 Japan Standard Time and Greenwich Mean Time, so the time you see is always right for right now.
How do I convert JST to GMT?
Enter a time in the JST box and the equivalent GMT 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 JST to GMT converter accurate with daylight saving?
Yes. It uses your browser's built-in time-zone database (the IANA zones behind Tokyo and Greenwich), which tracks daylight-saving changes automatically, so the current times and difference are correct.
What time is it in Greenwich right now?
The live clock above shows the current time in Greenwich (GMT), updating every second, alongside JST.
Does the JST to GMT time difference change?
No. Neither switch changes the gap: GMT is 9 h behind JST all year.
What is a good meeting time for JST and GMT?
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.