GMT to JST time converter
Japan Standard Time (JST) is 9 hours ahead of Greenwich Mean Time (GMT) all year round. Use the grid below to line up Greenwich and Tokyo: drag the cursor across the day, and working hours (9 AM–5 PM) are highlighted in every row so you can spot a slot that suits both sides.
Right now it is 09:43 UTC in Greenwich and 18:43 JST in Tokyo.
Tue, Oct 20
UTC home
09:43
Tue, Oct 20 · UTC+0
Tokyo
18:43
Tue, Oct 20 · UTC+9
2/10 zones · drag the tape, scroll sideways or use the arrow keys; Home jumps back to now.
GMT to JST: frequently asked
What is the time difference between GMT and JST?
Japan Standard Time (JST) is 9 hours ahead of Greenwich Mean Time (GMT) all year round.
What time is 9 AM GMT in JST?
9:00 AM GMT is 6:00 PM JST.
When do working hours overlap between Greenwich and Tokyo?
Standard 9:00 AM–5:00 PM working hours never overlap. The closest fit is 8:00 AM GMT, which is 5:00 PM JST.