JST to IST Time Converter
Type a time in JST to see it in IST, with daylight saving handled for the date you pick. Every hour of the day is in the table below, and the meeting planner shows when both working days overlap.
In India
5:30 amIST
9:00 am JST on Wed 14 Jan 2026 is 5:30 am IST the same day. India is 3 h 30 min behind Tokyo.
- Date there
- Wednesday 14 January 2026
- Offsets
- JST UTC+9 · IST UTC+5:30
- Date used
- Example day: Wednesday 14 January 2026
How this works: Method, 3 sources,
How this works
Method
Here JST means Japan Standard Time, UTC+9 all year; IST means India Standard Time, UTC+5:30 all year. So IST is 3 h 30 min behind JST all year. Two 9-to-5 working days overlap by 4 h 30 min all year. Full method
Sources
Changes
- 15 more conversion pages (IST to CST, BST to IST, SGT, GST, JST, MST and more); each conversion page shows all 24 hours with working hours shaded, and its best meeting times.
- The pickers find about a thousand more cities, states and countries (Seattle, Bangalore, Texas), and each conversion page names the next clock change on either side.
- The converter opens on the time now, live, with a Now choice beside the time, and the main converter starts from your own time zone.
- First published, with a world clock, pages for the time in 31 places and 15 common conversions such as PST to IST.
How to convert JST to IST
Here JST means Japan Standard Time, UTC+9 all year; IST means India Standard Time, UTC+5:30 all year. So IST is 3 h 30 min behind JST all year. Two 9-to-5 working days overlap by 4 h 30 min all year.
Japanese carmakers, electronics firms and banks have large operations in India, and JST to IST is how a Tokyo or Osaka team turns its schedule into Indian time. Japan is ahead, so a Japanese afternoon meeting at 1:00 pm is 9:30 am in India, and the overlap covers the Indian morning and early afternoon.
Neither Japan nor India uses daylight saving time, so the gap is 3 h 30 min all year and a recurring meeting never moves. Korea is on the same clock as Japan, UTC+9, so the same sum works for Seoul. The one thing to watch is the date: anything before 3:30 am in Tokyo is still the previous evening in India.
Rule of thumb: Subtract 3½ hours from Japan time: 6:00 pm in Tokyo is 2:30 pm in India, and 4:00 am there is 12:30 am here.
IST = JST −3:30
- Japan used daylight saving time only from 1948 to 1951 and has kept UTC+9 all year since. Source: IANA tz database, file asia.
Meeting planner: best times for JST and IST
The easiest meetings fall where both working days overlap, shaded dark on the bar. The lighter shading is still between 7 am and 9 pm on both clocks, so one side starts early or stays late.
All year: JST and IST
- Both at work: 12:30 pm to 5:00 pm JST is 9:00 am to 1:30 pm IST (4 h 30 min).
- Early or late for one side: 10:30 am to 12:30 pm JST is 7:00 am to 9:00 am IST (2 h); 5:00 pm to 9:00 pm JST is 1:30 pm to 5:30 pm IST (4 h).
Both between 9 am and 5 pmBoth between 7 am and 9 pm
JST to IST time conversion table
Every hour of the JST day and the time in IST. The difference is the same all year.
| JST time | IST time |
|---|---|
| 12:00 am | 8:30 pm (day before) |
| 1:00 am | 9:30 pm (day before) |
| 2:00 am | 10:30 pm (day before) |
| 3:00 am | 11:30 pm (day before) |
| 4:00 am | 12:30 am |
| 5:00 am | 1:30 am |
| 6:00 am | 2:30 am |
| 7:00 am | 3:30 am |
| 8:00 am | 4:30 am |
| 9:00 am | 5:30 am |
| 10:00 am | 6:30 am |
| 11:00 am | 7:30 am |
| 12:00 pm | 8:30 am |
| 1:00 pm | 9:30 am |
| 2:00 pm | 10:30 am |
| 3:00 pm | 11:30 am |
| 4:00 pm | 12:30 pm |
| 5:00 pm | 1:30 pm |
| 6:00 pm | 2:30 pm |
| 7:00 pm | 3:30 pm |
| 8:00 pm | 4:30 pm |
| 9:00 pm | 5:30 pm |
| 10:00 pm | 6:30 pm |
| 11:00 pm | 7:30 pm |
Shaded: 9 am to 5 pm on that clock. Where a row is shaded on both sides, both are at work.
Frequently Asked Questions
What is 9 am JST in IST?
9:00 am JST is 5:30 am IST, all year round.
What is 4 am JST in IST?
4:00 am in Japan is 12:30 am in India on the same date. It is still the middle of the Indian night.
Does Japan have daylight saving time?
No. Japan last changed its clocks for summer in 1951. It stays on UTC+9 all year, 3 h 30 min ahead of India.