Convert GMT to JST Time - London to Tokyo

Convert Greenwich Mean Time (GMT) to Japan Standard Time (JST, UTC+9) with our professional time zone converter. Designed for international business meetings between London to Tokyo, 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.

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GMT

Greenwich Mean Time

Current Time

Select Date & Time

→

🇯🇵

JST

Japan Standard Time

Current Time

Converted Time

Select a time to convert

Time Difference

Your Local Time

UTC Time

GMT to JST Time Conversion

Japan Standard Time is 9 hours ahead of Greenwich Mean Time

Always accurate • Live conversion

difference

GMT to JST Time Conversion Chart

Popular Time Conversions

Complete 24-Hour Conversion

Greenwich Mean Time to Japan Standard Time full day schedule

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

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12:00 AM

GMT

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9:00 AM

JST

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1:00 AM

GMT

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10:00 AM

JST

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2:00 AM

GMT

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11:00 AM

JST

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3:00 AM

GMT

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12:00 PM

JST

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4:00 AM

GMT

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1:00 PM

JST

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5:00 AM

GMT

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2:00 PM

JST

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6:00 AM

GMT

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3:00 PM

JST

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7:00 AM

GMT

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4:00 PM

JST

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8:00 AM

GMT

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5:00 PM

JST

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9:00 AM

GMT

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6:00 PM

JST

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10:00 AM

GMT

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7:00 PM

JST

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11:00 AM

GMT

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8:00 PM

JST

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12:00 PM

GMT

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9:00 PM

JST

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1:00 PM

GMT

→

10:00 PM

JST

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2:00 PM

GMT

→

11:00 PM

JST

🇯🇵

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3:00 PM

GMT

→

12:00 AM

JST

(next day)

🇯🇵

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4:00 PM

GMT

→

1:00 AM

JST

(next day)

🇯🇵

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5:00 PM

GMT

→

2:00 AM

JST

(next day)

🇯🇵

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6:00 PM

GMT

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3:00 AM

JST

(next day)

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7:00 PM

GMT

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4:00 AM

JST

(next day)

🇯🇵

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8:00 PM

GMT

→

5:00 AM

JST

(next day)

🇯🇵

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9:00 PM

GMT

→

6:00 AM

JST

(next day)

🇯🇵

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10:00 PM

GMT

→

7:00 AM

JST

(next day)

🇯🇵

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11:00 PM

GMT

→

8:00 AM

JST

(next day)

🇯🇵

Best Meeting Times for GMT and JST

Optimal Collaboration Hours

Best times for GMT ↔ JST meetings and calls

✅ Business hours overlap available

Recommended Meeting Windows

9:00 AM GMT → 6:00 PM JST

Perfect for both time zones

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

GMT vs JST Time Zone Details

Technical Information & Comparison

Detailed timezone specifications and regional data

🌍

Greenwich Mean Time

Source timezone

UTC Offset 0.0h

Code GMT

Region Global

Status ✓ Active

🇯🇵

Japan Standard Time

Target timezone

UTC Offset 9.0h

Code JST

Region Japan

Status ✓ Active

Frequently Asked Questions

What is the Greenwich Mean Time (GMT) to Japan Standard Time (JST) conversion?

The GMT to JST conversion involves converting Greenwich Mean Time (GMT), UTC+0:00, to Japan Standard Time (JST), UTC+9:00. This conversion is essential for coordinating schedules across these two time zones.

How many hours is GMT behind JST?

Greenwich Mean Time (GMT) is 9 hours behind Japan Standard Time (JST). Therefore, at noon GMT, it will be 9:00 PM JST on the same day.

How do I convert GMT time to JST time using your online tool?

To convert GMT to JST using our online tool at iformat.io, enter the desired GMT into the input field. The converter will automatically calculate and display the corresponding JST time, making it quick and easy.

What is the best tool to convert GMT to JST?

The best tool to convert GMT to JST is our free online converter at iformat.io. It provides real-time calculations and is user-friendly, ensuring accurate conversions between these two time zones.

What are the typical working hours for scheduling meetings between GMT and JST?

The typical working hours for scheduling meetings between GMT and JST are between 8:00 AM and 10:00 AM GMT, corresponding to 5:00 PM and 7:00 PM JST. This range accommodates working hours in both regions.

Can I use your GMT to JST converter on mobile devices?

Our GMT to JST converter is optimized for mobile devices, including iPhones and Android phones. Through iformat.io, you can easily access it on any device and perform conversions on the go.

How does Daylight Saving Time affect the conversion from GMT?

Greenwich Mean Time (GMT) does not observe Daylight Saving Time; therefore, the offset remains constant throughout the year. This consistency simplifies planning since GMT does not have seasonal changes.