JST to UTC Time Converter
Use this JST to UTC time converter to compare Japan and UTC time instantly. UTC is 9 hours behind JST, so 9:00 AM JST becomes 12:00 AM UTC and 5:00 PM JST becomes 8:00 AM UTC. The page is useful for business-hours overlap, international calls, remote-team handoffs, webinars, and travel planning, with daylight saving adjustments handled automatically.
JST to UTC Quick Facts
Use this JST to UTC converter to compare Japan and Universal time, check the 9 hours gap, and confirm the right slot for calls, handoffs, and deadlines. Good overlap starts around 6:00 PM JST / 9:00 AM UTC.
How to Convert JST to UTC
Converting between Japan Standard Time and Coordinated Universal Time means accounting for a 9 hours gap — here's how to do it in under 10 seconds with no sign-up.
Pick the date and time in Japan Standard Time (UTC +9) that you want to convert. Hit "Now" to load the current JST time instantly, or use "+1h" to step forward and compare.
The equivalent Coordinated Universal Time (UTC +0) time appears immediately. Since UTC is 9 hours behind of JST, most daytime conversions stay on the same calendar day.
Click "Copy Time" to grab the UTC result for your calendar or message. Use "+1d" to check how the conversion shifts across dates — helpful for scheduling recurring Japan–Universal calls.
Why Choose Our JST to UTC Converter
When someone in Japan suggests 6:00 PM JST, that's 9:00 AM UTC. This converter shows the overlap so both sides agree on one slot — no back-and-forth.
Late-night JST times can land on a different date in UTC because of the 9 hours offset. The converter labels "next day" or "previous day" next to the result so you never send a message a day early or miss a deadline.
Daylight Saving adjustments can widen or narrow the JST–UTC gap by an hour. During transition weeks many people get it wrong. This converter pulls the current UTC offsets automatically, so the result is right even on the changeover day.
Product launches, sports matches, and webinars are often announced in JST. Convert the event time to UTC so you know exactly when to tune in — with a 9 hours difference, a morning event in Japan hits the evening in Universal.
JST to UTC Time Conversion Chart
Quick-reference conversion table covering every hour of the day at a glance.
Japan Standard Time to Coordinated Universal Time full day schedule
| Japan Standard Time | Coordinated Universal Time |
|---|---|
| 12:00 AM |
3:00 PM
(previous day)
|
| 1:00 AM |
4:00 PM
(previous day)
|
| 2:00 AM |
5:00 PM
(previous day)
|
| 3:00 AM |
6:00 PM
(previous day)
|
| 4:00 AM |
7:00 PM
(previous day)
|
| 5:00 AM |
8:00 PM
(previous day)
|
| 6:00 AM |
9:00 PM
(previous day)
|
| 7:00 AM |
10:00 PM
(previous day)
|
| 8:00 AM |
11:00 PM
(previous day)
|
| 9:00 AM |
12:00 AM
|
| 10:00 AM |
1:00 AM
|
| 11:00 AM |
2:00 AM
|
| 12:00 PM |
3:00 AM
|
| 1:00 PM |
4:00 AM
|
| 2:00 PM |
5:00 AM
|
| 3:00 PM |
6:00 AM
|
| 4:00 PM |
7:00 AM
|
| 5:00 PM |
8:00 AM
|
| 6:00 PM |
9:00 AM
|
| 7:00 PM |
10:00 AM
|
| 8:00 PM |
11:00 AM
|
| 9:00 PM |
12:00 PM
|
| 10:00 PM |
1:00 PM
|
| 11:00 PM |
2:00 PM
|
Popular JST Time Converters
Explore more JST conversions for major business and travel corridors. Each page includes a 24-hour chart, time difference summary, and meeting overlap guidance.
Convert Other Time Zones to UTC
Find the time difference from any major zone into Coordinated Universal Time. Use these pages when scheduling with Universal from a different region.