Time zone converter

IST to JST

Japan Standard Time (JST) is 3 hours 30 minutes ahead of India Standard Time (IST) all year: 9:00 AM IST is 12:30 PM JST.

India Standard Time
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Current time in India Standard Time
Japan Standard Time
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Current time in Japan Standard Time
Pick a date and time to convert.

JST vs IST over the next 12 months

PeriodJST isExample
Oct 23, 2026 onwards3 hours 30 minutes ahead9:00 AM IST = 12:30 PM JST

IST to JST conversion table

Every hour of a weekday around Oct 23, 2026, in both zones.

India Standard TimeJapan Standard Time
12:00 AM3:30 AM
1:00 AM4:30 AM
2:00 AM5:30 AM
3:00 AM6:30 AM
4:00 AM7:30 AM
5:00 AM8:30 AM
6:00 AM9:30 AM
7:00 AM10:30 AM
8:00 AM11:30 AM
9:00 AM12:30 PM
10:00 AM1:30 PM
11:00 AM2:30 PM
12:00 PM3:30 PM
1:00 PM4:30 PM
2:00 PM5:30 PM
3:00 PM6:30 PM
4:00 PM7:30 PM
5:00 PM8:30 PM
6:00 PM9:30 PM
7:00 PM10:30 PM
8:00 PM11:30 PM
9:00 PM12:30 AM (next day)
10:00 PM1:30 AM (next day)
11:00 PM2:30 AM (next day)

Best time for a meeting

Normal 9-to-5 working hours overlap for 4 hours 30 minutes on a weekday: 9:00 AM–1:30 PM IST, which is 12:30 PM–5:00 PM JST.

Comparing more than two places? The meeting planner lines up working hours for up to six cities.

Daylight saving time

Neither IST nor JST changes its clocks, so the difference is the same all year.

Where these clocks are used

  • India Standard Time (IST): all of India: Mumbai, Delhi, Bengaluru, Chennai. IANA zone Asia/Kolkata.
  • Japan Standard Time (JST): all of Japan. IANA zone Asia/Tokyo.

Questions

What time is it in JST when it is 9 AM IST?

On Oct 23, 2026, 9:00 AM IST is 12:30 PM JST.

How many hours ahead of IST is JST?

JST is always 3 hours 30 minutes ahead of IST.

Do IST and JST observe daylight saving time?

India Standard Time stays on UTC+5:30 all year. Japan Standard Time stays on UTC+9 all year.

What is the best time for a meeting between IST and JST?

Normal 9-to-5 working hours overlap for 4 hours 30 minutes on a weekday: 9:00 AM–1:30 PM IST, which is 12:30 PM–5:00 PM JST.

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Related conversions

Computed from the IANA time zone database on Oct 23, 2026. Live clocks and the converter use your browser's copy of the same data.