Convert JST to GMT Time - Tokyo to London

Convert Japan Standard Time (JST) to Greenwich Mean Time (GMT, UTC+0) with our professional time zone converter. Designed for international business meetings between Tokyo to London, this tool provides real-time conversion, optimal meeting time suggestions, business hours comparison, and 24-hour conversion tables. Features include live clock displays, meeting scheduler, time zone maps, and daylight saving time handling.

🇯🇵

JST

Japan Standard Time

Current Time

Select Date & Time

→

🌍

GMT

Greenwich Mean Time

Current Time

Converted Time

Select a time to convert

Time Difference

Your Local Time

UTC Time

JST to GMT Time Conversion

Greenwich Mean Time is 9 hours behind Japan Standard Time

Always accurate • Live conversion

-9h

difference

JST to GMT Time Conversion Chart

Popular Time Conversions

Complete 24-Hour Conversion

Japan Standard Time to Greenwich Mean Time full day schedule

🇯🇵 Japan Standard Time	🌍 Greenwich Mean Time
12:00 AM 00:00	3:00 PM (previous day) 15:00
1:00 AM 01:00	4:00 PM (previous day) 16:00
2:00 AM 02:00	5:00 PM (previous day) 17:00
3:00 AM 03:00	6:00 PM (previous day) 18:00
4:00 AM 04:00	7:00 PM (previous day) 19:00
5:00 AM 05:00	8:00 PM (previous day) 20:00
6:00 AM 06:00	9:00 PM (previous day) 21:00
7:00 AM 07:00	10:00 PM (previous day) 22:00
8:00 AM 08:00	11:00 PM (previous day) 23:00
9:00 AM 09:00	12:00 AM 00:00
10:00 AM 10:00	1:00 AM 01:00
11:00 AM 11:00	2:00 AM 02:00
12:00 PM 12:00	3:00 AM 03:00
1:00 PM 13:00	4:00 AM 04:00
2:00 PM 14:00	5:00 AM 05:00
3:00 PM 15:00	6:00 AM 06:00
4:00 PM 16:00	7:00 AM 07:00
5:00 PM 17:00	8:00 AM 08:00
6:00 PM 18:00	9:00 AM 09:00
7:00 PM 19:00	10:00 AM 10:00
8:00 PM 20:00	11:00 AM 11:00
9:00 PM 21:00	12:00 PM 12:00
10:00 PM 22:00	1:00 PM 13:00
11:00 PM 23:00	2:00 PM 14:00

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12:00 AM

JST

→

3:00 PM

GMT

(previous day)

🌍

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1:00 AM

JST

→

4:00 PM

GMT

(previous day)

🌍

🇯🇵

2:00 AM

JST

→

5:00 PM

GMT

(previous day)

🌍

🇯🇵

3:00 AM

JST

→

6:00 PM

GMT

(previous day)

🌍

🇯🇵

4:00 AM

JST

→

7:00 PM

GMT

(previous day)

🌍

🇯🇵

5:00 AM

JST

→

8:00 PM

GMT

(previous day)

🌍

🇯🇵

6:00 AM

JST

→

9:00 PM

GMT

(previous day)

🌍

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7:00 AM

JST

→

10:00 PM

GMT

(previous day)

🌍

🇯🇵

8:00 AM

JST

→

11:00 PM

GMT

(previous day)

🌍

🇯🇵

9:00 AM

JST

→

12:00 AM

GMT

🌍

🇯🇵

10:00 AM

JST

→

1:00 AM

GMT

🌍

🇯🇵

11:00 AM

JST

→

2:00 AM

GMT

🌍

🇯🇵

12:00 PM

JST

→

3:00 AM

GMT

🌍

🇯🇵

1:00 PM

JST

→

4:00 AM

GMT

🌍

🇯🇵

2:00 PM

JST

→

5:00 AM

GMT

🌍

🇯🇵

3:00 PM

JST

→

6:00 AM

GMT

🌍

🇯🇵

4:00 PM

JST

→

7:00 AM

GMT

🌍

🇯🇵

5:00 PM

JST

→

8:00 AM

GMT

🌍

🇯🇵

6:00 PM

JST

→

9:00 AM

GMT

🌍

🇯🇵

7:00 PM

JST

→

10:00 AM

GMT

🌍

🇯🇵

8:00 PM

JST

→

11:00 AM

GMT

🌍

🇯🇵

9:00 PM

JST

→

12:00 PM

GMT

🌍

🇯🇵

10:00 PM

JST

→

1:00 PM

GMT

🌍

🇯🇵

11:00 PM

JST

→

2:00 PM

GMT

🌍

Best Meeting Times for JST and GMT

Optimal Collaboration Hours

Best times for JST ↔ GMT meetings and calls

✅ Business hours overlap available

Recommended Meeting Windows

6:00 PM JST → 9:00 AM GMT

Perfect for both time zones

Based on standard business hours (9:00 AM - 6:00 PM) in each time zone

JST vs GMT Time Zone Details

Technical Information & Comparison

Detailed timezone specifications and regional data

🇯🇵

Japan Standard Time

Source timezone

UTC Offset 9.0h

Code JST

Region Global

Status ✓ Active

🌍

Greenwich Mean Time

Target timezone

UTC Offset 0.0h

Code GMT

Region Global

Status ✓ Active

Frequently Asked Questions

What is the time difference between JST and GMT?

Japan Standard Time (JST) is 9 hours ahead of Greenwich Mean Time (GMT). This means that when it is noon in GMT, it is 9:00 PM in JST.

How do I convert JST to GMT manually?

To convert JST to GMT manually, subtract 9 hours from the JST time. For example, if it is 3:00 PM JST, it would be 6:00 AM GMT after the conversion.

Are there online tools available for converting JST to GMT?

Yes, several online tools can help you convert JST to GMT easily. Websites like iformat.io provide user-friendly interfaces where you can instantly input your JST time and receive the corresponding GMT.

What is the best time to schedule a call between JST and GMT?

The most convenient time for a conference call between JST and GMT is between 5:00 PM and 7:00 PM in JST, corresponding to 8:00 AM and 10:00 AM in GMT. This timeframe accommodates regular working hours for both regions.

How does daylight saving time affect the conversion from JST to GMT?

Japan does not observe daylight saving time, so the conversion from JST to GMT remains consistent throughout the year. You will always subtract 9 hours from JST to get GMT.

Are there specific tools on iformat.io that make converting JST to GMT easier?

Yes, iformat.io offers tools for easy time zone conversions, including options specifically for converting between JST and GMT. These tools streamline the process and help avoid confusion when scheduling across different time zones.