IST to JST Converter
JST is 3 hours 30 minutes ahead of IST all year.
JST to IST insteadTime difference between IST and JST
JST is 3 hours 30 minutes ahead of IST all year.
Neither side uses daylight saving time, so the difference never changes.
IST to JST conversion table
| IST | JSTAll year |
|---|---|
| 12 AM | 3:30 AM |
| 1 AM | 4:30 AM |
| 2 AM | 5:30 AM |
| 3 AM | 6:30 AM |
| 4 AM | 7:30 AM |
| 5 AM | 8:30 AM |
| 6 AM | 9:30 AM |
| 7 AM | 10:30 AM |
| 8 AM | 11:30 AM |
| 9 AM | 12:30 PM |
| 10 AM | 1:30 PM |
| 11 AM | 2:30 PM |
| 12 PM | 3:30 PM |
| 1 PM | 4:30 PM |
| 2 PM | 5:30 PM |
| 3 PM | 6:30 PM |
| 4 PM | 7:30 PM |
| 5 PM | 8:30 PM |
| 6 PM | 9:30 PM |
| 7 PM | 10:30 PM |
| 8 PM | 11:30 PM |
| 9 PM | 12:30 AM+1 day |
| 10 PM | 1:30 AM+1 day |
| 11 PM | 2:30 AM+1 day |
Best time to meet
Working hours (9 AM – 5 PM) overlap for 4 hours 30 minutes: 9 AM – 1:30 PM IST (12:30 PM – 5 PM JST). That window is the best time for calls and meetings.
Frequently asked questions
What time is it in JST when it's 9 AM in IST?
12:30 PM. JST is 3 hours 30 minutes ahead of IST.
How many hours is JST ahead of IST?
3 hours 30 minutes, all year round. Neither side uses daylight saving time, so the difference never changes.
Does IST use daylight saving time?
No. India Standard Time stays at UTC+5:30 all year.
Does JST use daylight saving time?
No. Japan Standard Time stays at UTC+9 all year.
When is the best time to schedule a meeting between IST and JST?
Working hours (9 AM – 5 PM) overlap for 4 hours 30 minutes: 9 AM – 1:30 PM IST (12:30 PM – 5 PM JST). That window is the best time for calls and meetings.
Which IST does this page use?
IST here means India Standard Time (UTC+5:30), not Irish or Israel Standard Time.