JST to IST Time Converter
India Standard Time (IST) is currently 3 hours 30 minutes behind Japan Standard Time (JST). JST is UTC+9 and IST is UTC+5:30. The table below converts every hour of the day between the two, and the call planner shows where working hours line up.
Best Time for a Call
Both sides are inside 9:00 AM to 5:00 PM office hours between 12:30 PM and 5:00 PM in JST, which is 9:00 AM to 1:30 PM in IST.
Comparing more than two places? The Overlap Zones tool shows working hours for several cities on one grid.
Hour by Hour: JST to IST
Rows marked office hours fall between 9:00 AM and 5:00 PM in both places. For a specific date, use the interactive converter.
Does the Difference Change During the Year?
JST and IST are fixed offsets, so the difference between them never changes.
JST is UTC+9. Japan has no daylight saving, so this offset never changes.
This page covers India Standard Time, UTC+5:30, which has no daylight saving. IST can also refer to Irish Standard Time (UTC+1) or Israel Standard Time (UTC+2).
Frequently Asked Questions
How many hours behind is IST compared to JST?
IST is currently 3 hours 30 minutes behind JST. JST and IST are fixed offsets, so the difference between them never changes.
What time is 9:00 AM in JST in IST?
9:00 AM in JST is 5:30 AM in IST.
What is the best time for a call between JST and IST?
Both sides are inside 9:00 AM to 5:00 PM office hours between 12:30 PM and 5:00 PM in JST, which is 9:00 AM to 1:30 PM in IST.