IST to JST
Live, right now. Asia/Kolkata → Asia/Tokyo
7:06 pm in IST is
10:36 pm in JST.
19:06 → 22:36 on a 24-hour clock ·
IST → JST
IST now
7:06pm
IST · UTC+5:30
Asia/Kolkata
Clocks here do not change — this zone stays on the same offset all year.
JST now
10:36pm
JST · UTC+9
Asia/Tokyo
Clocks here do not change — this zone stays on the same offset all year.
Convert a specific time minutes work, not just whole hours
Hour by hour
| IST | JST | 24h | Good to call? |
|---|---|---|---|
| 12am | 3am | 00:00 → 03:30 | asleep in JST |
| 1am | 4am | 01:00 → 04:30 | asleep in JST |
| 2am | 5am | 02:00 → 05:30 | asleep in JST |
| 3am | 6am | 03:00 → 06:30 | asleep in JST |
| 4am | 7am | 04:00 → 07:30 | asleep in IST |
| 5am | 8am | 05:00 → 08:30 | asleep in IST |
| 6am | 9am | 06:00 → 09:30 | asleep in IST |
| 7am | 10am | 07:00 → 10:30 | awake, not at work |
| 8am | 11am | 08:00 → 11:30 | awake, not at work |
| 9am | 12pm | 09:00 → 12:30 | both at work |
| 10am | 1pm | 10:00 → 13:30 | both at work |
| 11am | 2pm | 11:00 → 14:30 | both at work |
| 12pm | 3pm | 12:00 → 15:30 | both at work |
| 1pm | 4pm | 13:00 → 16:30 | both at work |
| 2pm | 5pm | 14:00 → 17:30 | awake, not at work |
| 3pm | 6pm | 15:00 → 18:30 | awake, not at work |
| 4pm | 7pm | 16:00 → 19:30 | awake, not at work |
| 5pm | 8pm | 17:00 → 20:30 | awake, not at work |
| 6pm | 9pm | 18:00 → 21:30 | awake, not at work |
| 7pm now | 10pm | 19:00 → 22:30 | asleep in JST |
| 8pm | 11pm | 20:00 → 23:30 | asleep in JST |
| 9pm | 12am Fri | 21:00 → 00:30 | asleep in JST |
| 10pm | 1am Fri | 22:00 → 01:30 | asleep in JST |
| 11pm | 2am Fri | 23:00 → 02:30 | asleep in JST |
Call times
Both places are at work between 9am and 14:00 in Kolkata — 12pm to 4pm at the other end.
12am
3am
3am
1am
4am
4am
2am
5am
5am
3am
6am
6am
4am
7am
7am
5am
8am
8am
6am
9am
9am
7am
10am
10am
8am
11am
11am
9am
12pm
12pm
10am
1pm
1pm
11am
2pm
2pm
12pm
3pm
3pm
1pm
4pm
4pm
2pm
5pm
5pm
3pm
6pm
6pm
4pm
7pm
7pm
5pm
8pm
8pm
6pm
9pm
9pm
7pm
10pm
10pm
8pm
11pm
11pm
9pm
12am
12am
10pm
1am
1am
11pm
2am
2am
both at work
work hours here
awake
asleep
Questions people ask
What time is it in JST when it is 7:06 pm in IST?
10:36 pm in JST the same day.
How many hours ahead is JST of IST?
JST is 3 hours 30 minutes ahead IST. Neither place changes its clocks, so that gap is the same all year. The table on this page is recalculated for today, so it is already correct for the current season.
What is the best time to call between IST and JST?
Both places are at work between 9am and 14:00 in Kolkata — 12pm to 4pm at the other end.