GMT to JST: Convert GMT / UTC to Japan Time
Need to convert GMT to JST? Japan (JST) is +9 hours from GMT / UTC. Whether you are scheduling a call, planning a meeting, or coordinating with a remote team, this quick reference shows common time conversions between GMT and JST. Use our Timezone Converter for any custom time.
Quick Answer
| Label | Value |
|---|---|
| 9:00 AM GMT | 6:00 PM JST |
| 12:00 PM GMT | 9:00 PM JST |
| 3:00 PM GMT | 12:00 AM JST (next day) |
| 6:00 PM GMT | 3:00 AM JST (next day) |
How It Works
JST = GMT +9 hours. GMT / UTC is UTC+0 and Japan (JST) is UTC+9. The difference is +9 hours. Add +9 hours to any GMT time to get JST. If the result exceeds 11:59 PM, it rolls to the next day. Our Timezone Converter handles all the math including half-hour offsets and day boundaries.
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Related Calculators
9:00 AM GMT is 6:00 PM JST. The offset is +9 hours.
This converter uses standard time offsets. During daylight saving in either region, the offset may shift by 1 hour. Check specific dates for accuracy.
Look for overlapping business hours (9 AM - 5 PM) in both zones. With a +9-hour difference, the overlap depends on how far apart the zones are. Use our converter to check specific times.