JST to UTC Converter

Use our converter below to change times between Japan Standard Time (JST) to UTC (UTC). If you mixed up your time zones and would like to convert UTC to JST instead, you can find that converter here: UTC to Japan Standard Time Converter. And if you don't like either of our tools, then go back to see all of our time zone converters.

Convert Time

Japan Standard Time

Japan Standard Time (JST) is the time zone followed in Japan, including cities like Tokyo and Osaka. It is 9 hours ahead of UTC and does not observe daylight saving time.


UTC, or Coordinated Universal Time, is the primary time standard used around the world. It doesn't have any associated cities, as it serves as the basis for calculating time differences between different time zones.

How to convert time from Japan Standard Time (JST) to UTC (UTC)

Converting between Japan Standard Time (JST) and UTC (UTC) could be challenging. As companies become more global, we find ourselves in a mess of calendar invites. Time changes from JST cities like Tokyo, Osaka, Nagoya, Sapporo are -9 hour(s) apart to UTC cities like , holiday schedules, and the basic communication becomes a juggling act. To make it easier to understand, we'll break down the process of converting time between JST and UTC into step-by-step instructions.

Understanding Japan Standard Time and UTC

Japan Standard Time is UTC9, which means that the local time in the Japan Standard Time zone is 9 hours apart from UTC. UTC is UTC0, which means that the local time in the UTC zone is 0 hours apart from UTC.

Calculate the Time Difference

To convert time from Japan Standard Time to UTC, we first need to find the time difference between both time zones. Since Japan Standard Time is UTC9 and UTC is UTC0, the time difference is: -9 hour(s)

  • -9 hours = Japan Standard Time's difference from UTC 0 + (UTC's difference from UTC 9
  • UTC has -9 hour(s) difference Japan Standard Time.

Step 3: Add the Time Difference to the Japan Standard Time Time

To convert a specific time from Japan Standard Time to UTC, we simply add the time difference (-9 hours) to the Japan Standard Time time. Make sure to also adjust the day if the converted time goes past midnight. Or if you are using 24-hour time or Military Time, ensure you’re using the correct attributes.

Step 4: Practice Converting Times

Now that you know the process, try converting different times from Japan Standard Time to UTC for practice before going to the answer page. Remember to always add the UTC time difference to the Japan Standard Time time.

Scheduling a meeting between Japan Standard Time and UTC

When scheduling a meeting between employees in the Japan Standard Time and UTC zones, there are several factors to consider to ensure that the meeting is convenient and productive for all participants. Here's a detailed breakdown of what you should consider before scheduling across time zones:

  • Convert Time Difference: As we've discussed earlier, UTC is -9 ahead of Japan Standard Time. It's crucial to take this time difference into account when scheduling a meeting to avoid scheduling conflicts or creating meetings at odd or inappropriate hours. In my experience, accidentally scheduling a meeting a 4am is awkward.
  • Overlapping Working Hours: To find a suitable time for the meeting, you’ll need to identify the overlapping working hours between the two time zones. For example, if employees in both zones work from 9:00 AM to 5:00 PM local time, the overlapping hours could be between 9:00 AM and 11:00 AM Japan Standard Time but -9 hours different to UTC. Be upfront with UTC employees to find the right time.
  • Consideration of Local Holidays: Be mindful of local Japan Standard Time and UTC holidays, festivals, or observances in both time zones. These events might affect employee availability or working hours. Check local calendars for both the Japan Standard Time and UTC zones to avoid scheduling conflicts.
  • Communicate Time Zone Differences: Clearly communicate the meeting time in both Japan Standard Time and UTC to avoid confusion. Using a tool like an online meeting planner or time zone converter can help simplify the process and ensure accuracy.

Converting time zones across other countries

The process of converting time between two time zones is similar regardless of the countries involved. You'll need to determine the time difference between the two zones and add it to the time in the first zone. Keep in mind that some countries may observe daylight saving time or have different time zones within the country. It's important to double-check the time difference before scheduling any meetings or events.