JST to IST Time Converter

Convert Japan Standard Time (JST) to India Standard Time (IST). Both time zones are shown live below; current offset between them is 3h 30m behind.

Tokyo · Japan Standard Time
05:55:28
Monday, May 11, 2026
GMT+9 · UTC+09:00
Mumbai · India Standard Time
02:25:28
Monday, May 11, 2026
GMT+5:30 · UTC+05:30

Convert a specific time

From: JST (Tokyo)
To: IST (Mumbai)
--:--

Daylight Saving status right now

JST (Japan Standard Time)
Observes DST
No
IST (India Standard Time)
Observes DST
No

When can JST and IST meet?

00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
JST
IST
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Tokyo (JST). Each row shows the local working-hours state in that zone for the same moment in time.
4 hours of overlap during standard 9am-5pm working hours.
Best meeting window: 13:00–16:00 JST (09:30–12:30 IST).

Hour-by-hour JST to IST conversion table

JST time (Tokyo)IST time (Mumbai)Status
00:00 Mon20:30 SunOff-hours both sides
01:00 Mon21:30 SunOff-hours both sides
02:00 Mon22:30 SunOff-hours both sides
03:00 Mon23:30 SunOff-hours both sides
04:00 Mon00:30 MonOff-hours both sides
05:00 Mon01:30 MonOff-hours both sides
06:00 Mon02:30 MonOff-hours both sides
07:00 Mon03:30 MonOff-hours both sides
08:00 Mon04:30 MonOff-hours both sides
09:00 Mon05:30 MonJST working
10:00 Mon06:30 MonJST working
11:00 Mon07:30 MonJST working
12:00 Mon08:30 MonJST working
13:00 Mon09:30 MonBoth at work
14:00 Mon10:30 MonBoth at work
15:00 Mon11:30 MonBoth at work
16:00 Mon12:30 MonBoth at work
17:00 Mon13:30 MonIST working
18:00 Mon14:30 MonIST working
19:00 Mon15:30 MonIST working
20:00 Mon16:30 MonIST working
21:00 Mon17:30 MonOff-hours both sides
22:00 Mon18:30 MonOff-hours both sides
23:00 Mon19:30 MonOff-hours both sides

Times computed for today in each zone using the IANA time zone database. The conversion accounts for daylight saving time wherever applicable.

About these time zones

Japan Standard Time (JST)
IANA identifier
Asia/Tokyo
Current UTC offset
UTC+09:00
Current abbreviation
GMT+9
Major cities in this zone
TokyoOsakaKyotoYokohama
India Standard Time (IST)
IANA identifier
Asia/Kolkata
Current UTC offset
UTC+05:30
Current abbreviation
GMT+5:30
Major cities in this zone
MumbaiNew DelhiBangaloreChennaiKolkata

Sun today in Tokyo and Mumbai

Tokyo
Sunrise
04:41
Sunset
18:36
Solar noon
11:39
Daylight
13h 55m
Mumbai
Sunrise
06:06
Sunset
19:05
Solar noon
12:36
Daylight
12h 58m

Related converters

IST to JST (reverse)JST to ESTJST to PSTJST to GMTJST to UTCJST to CETEST to ISTPST to ISTGMT to ISTUTC to ISTCET to IST
Looking for local time? See time in Tokyo or time in Mumbai.

Frequently asked questions

What is the time difference between JST and IST right now?+
IST (India Standard Time) is currently 3h 30m behind JST (Japan Standard Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does JST or IST observe daylight saving time?+
JST: does not observe daylight saving time. IST: does not observe daylight saving time.
When is the best time to schedule a meeting between JST and IST?+
The strongest overlap is 13:00–16:00 JST (09:30–12:30 IST), giving 4 hours when both sides are within standard 9am-5pm working hours.
What time is it in Mumbai when it is 12:00 noon in Tokyo?+
When it is 12:00 Mon in Tokyo (JST), it is 08:30 Mon in Mumbai (IST).
Which IANA time zone identifiers are used for JST and IST?+
JST maps to "Asia/Tokyo" in the IANA database. IST maps to "Asia/Kolkata". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Tokyo ahead of or behind Mumbai?+
Whether Tokyo (JST) is ahead of or behind Mumbai (IST) depends on the current UTC offsets. Right now IST is 3h 30m behind JST. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for JST and IST?+
JST is UTC+09:00 (GMT+9) and IST is UTC+05:30 (GMT+5:30). Both offsets shift by one hour when the corresponding region enters or exits daylight saving time, so the live values on this page are the source of truth.
Can I schedule meetings during business hours for both JST and IST?+
Yes. There are 4 hours of overlap during standard 9am-5pm working hours, with the strongest window at 13:00–16:00 JST.