JST to GMT Converter

GMT is 9h 0m behind JST. When it's 12:00 PM JST, it's 3:00 AM GMT.

From

JST · UTC+9

1:09:53PM

Japan Standard Time

e.g. Tokyo

To

GMT · UTC

4:09:53AM

Greenwich Mean Time

e.g. London

Open in World ClockGMT → JST
9:00 AM JST=12:00 AM GMT
12:00 PM JST=3:00 AM GMT
5:00 PM JST=8:00 AM GMT

Hourly conversion (JST → GMT)

JSTGMT
12:00 AM3:00 PM(−1 day)
1:00 AM4:00 PM(−1 day)
2:00 AM5:00 PM(−1 day)
3:00 AM6:00 PM(−1 day)
4:00 AM7:00 PM(−1 day)
5:00 AM8:00 PM(−1 day)
6:00 AM9:00 PM(−1 day)
7:00 AM10:00 PM(−1 day)
8:00 AM11:00 PM(−1 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

Shaded rows are within standard working hours (8am–6pm) on both sides.

Japan does not observe daylight saving time, so JST (UTC+9) applies year-round.

GMT (UTC+0) equals UTC. The UK uses BST (UTC+1) in summer.

More JST conversions

Frequently asked questions

What is the time difference between JST and GMT?
GMT is 9h 0m behind JST. JST is UTC+9 and GMT is UTC.
What is 12:00 PM JST in GMT?
12:00 PM JST is 3:00 AM GMT.
Does JST change for daylight saving time?
Japan does not observe daylight saving time, so JST (UTC+9) applies year-round.