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London · Reykjavik · Accra
Plan global invites faster using the professional meeting planner.
Difference
JST vs GMT
UTC → UTC
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Tokyo · Osaka · Yokohama
GMT to JST converter
GMT to JST Converter
Convert GMT (London) to JST (Tokyo) now. Live clocks, the current time difference, and a simple meeting window — free.
Etc/UTC
—
GMT → JST
To · Japan Standard Time
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Asia/Tokyo
Interactive diagram
Watch GMT convert into JST
Drag the GMT hour. Watch the Japan clock change.
GMT
9:00 AM GMT
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JST ← GMT
Japan
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Full-day chart
GMT to JST hourly conversion chart
Full-day table. Tap a row to copy. Labels follow daylight saving.
| GMT | Japan | UTC offsets |
|---|
Meeting times
Best GMT to JST meeting window
Find hours that work on both sides. Then save the slot to your calendar.
Follow along
Step-by-step GMT to JST conversion
Four short steps to convert any GMT time to JST.
Choose GMT time
Select any hour in Greenwich Mean Time. Smart mode uses Etc/UTC.
GMT to JST conversion guide
GMT to JST conversion guide
This GMT to JST converter shows Japan Standard Time (UTC+9) for any Greenwich Mean Time (UTC±0) time. Use it to schedule between London and Tokyo. Choose Smart DST for live city clocks. Choose Fixed mode when you only want the GMT and JST labels.
GMT
GMT
UTC±0
London · Reykjavik · Accra
GMT vs JST—
Japan
JST
UTC+9
Tokyo · Osaka · Yokohama
What is GMT to JST conversion?
GMT to JST conversion turns a GMT clock into the matching JST time. Use it for calls, travel, and teams in London and Tokyo.
GMT to JST time difference
JST is 9 hours ahead of GMT. Add 9 hours to the GMT time to get JST. The live clocks at the top show the current GMT to JST gap.
GMT vs JST
GMT is UTC±0. JST is UTC+9. They are different names. If a region uses daylight saving, check the live labels.
GMT to JST now / current time
Need gmt to jst right now? Read the live clocks, or tap Use current time for an instant GMT → JST result.
GMT to JST time difference
Season / context — tap to explore
See how daylight saving can change this pair.
GMT—
—GMT → JST
Japan—
Quick answers
GMT
Greenwich Mean Time (GMT)
UTC±0
Same as UTC+0 here. London often uses BST in summer.
- Cities: London · Reykjavik · Accra
- City clock: Etc/UTC
- Fixed GMT: UTC±0
- On this page it pairs with JST (UTC+9)
Japan
Japan Standard Time (JST)
UTC+9
Japan Standard Time (JST) is UTC+9. Smart DST uses Asia/Tokyo for cities such as Tokyo · Osaka · Yokohama.
- Cities: Tokyo · Osaka · Yokohama
- City clock: Asia/Tokyo
- Fixed JST: UTC+9
- From GMT: JST is 9 hours ahead of GMT
GMT to JST FAQ
Common GMT to JST questions
What is the GMT to JST time difference?
JST is 9 hours ahead of GMT. Fixed labels: GMT = UTC±0, JST = UTC+9. Add 9 hours to the GMT time to get JST.
How do I convert GMT to JST quickly?
Add 9 hours to the GMT time to get JST. Example: 3:00 AM GMT → 12:00 PM JST. Or use the live GMT to JST converter above.
Is JST the same as GMT?
No. GMT is UTC±0 (London · Reykjavik · Accra). JST is UTC+9 (Tokyo · Osaka · Yokohama).
What is a good GMT to JST meeting time?
JST is ahead. Try 7:00–11:00 AM GMT. That is about 4:00 PM–8:00 PM JST. Use the meeting planner on this page to export an ICS or Google Calendar invite.
What cities use GMT and JST?
GMT is common in London · Reykjavik · Accra. JST is common in Tokyo · Osaka · Yokohama. Smart DST uses Etc/UTC and Asia/Tokyo.