IST to KOST Time Converter

Convert India Standard Time (IST) to Kosrae Time (KOST). Both time zones are shown live below; current offset between them is 5h 30m ahead.

Mumbai · India Standard Time
18:38:12
Tuesday, May 12, 2026
GMT+5:30 · UTC+05:30
Tofol · Kosrae Time
00:08:12
Wednesday, May 13, 2026
GMT+11 · UTC+11:00

Convert a specific time

From: IST (Mumbai)
To: KOST (Tofol)
--:--

Daylight Saving status right now

IST (India Standard Time)
Observes DST
No
KOST (Kosrae Time)
Observes DST
No

When can IST and KOST meet?

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

Hour-by-hour IST to KOST conversion table

IST time (Mumbai)KOST time (Tofol)Status
00:00 Tue05:30 TueOff-hours both sides
01:00 Tue06:30 TueOff-hours both sides
02:00 Tue07:30 TueOff-hours both sides
03:00 Tue08:30 TueOff-hours both sides
04:00 Tue09:30 TueKOST working
05:00 Tue10:30 TueKOST working
06:00 Tue11:30 TueKOST working
07:00 Tue12:30 TueKOST working
08:00 Tue13:30 TueKOST working
09:00 Tue14:30 TueBoth at work
10:00 Tue15:30 TueBoth at work
11:00 Tue16:30 TueBoth at work
12:00 Tue17:30 TueIST working
13:00 Tue18:30 TueIST working
14:00 Tue19:30 TueIST working
15:00 Tue20:30 TueIST working
16:00 Tue21:30 TueIST working
17:00 Tue22:30 TueOff-hours both sides
18:00 Tue23:30 TueOff-hours both sides
19:00 Tue00:30 WedOff-hours both sides
20:00 Tue01:30 WedOff-hours both sides
21:00 Tue02:30 WedOff-hours both sides
22:00 Tue03:30 WedOff-hours both sides
23:00 Tue04:30 WedOff-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

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
Kosrae Time (KOST)
IANA identifier
Pacific/Kosrae
Current UTC offset
UTC+11:00
Current abbreviation
GMT+11
Major cities in this zone
Tofol

Sun today in Mumbai and Tofol

Mumbai
Sunrise
06:06
Sunset
19:05
Solar noon
12:36
Daylight
12h 59m

Related converters

KOST to IST (reverse)IST to ESTIST to PSTIST to GMTIST to UTCIST to CETEST to KOSTPST to KOSTGMT to KOSTUTC to KOSTCET to KOST
Looking for local time? See time in Mumbai or time in Tofol.

Frequently asked questions

What is the time difference between IST and KOST right now?+
KOST (Kosrae Time) is currently 5h 30m ahead IST (India Standard Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does IST or KOST observe daylight saving time?+
IST: does not observe daylight saving time. KOST: does not observe daylight saving time.
When is the best time to schedule a meeting between IST and KOST?+
The strongest overlap is 09:00–11:00 IST (14:30–16:30 KOST), giving 3 hours when both sides are within standard 9am-5pm working hours.
What time is it in Tofol when it is 12:00 noon in Mumbai?+
When it is 12:00 Tue in Mumbai (IST), it is 17:30 Tue in Tofol (KOST).
Which IANA time zone identifiers are used for IST and KOST?+
IST maps to "Asia/Kolkata" in the IANA database. KOST maps to "Pacific/Kosrae". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Mumbai ahead of or behind Tofol?+
Whether Mumbai (IST) is ahead of or behind Tofol (KOST) depends on the current UTC offsets. Right now KOST is 5h 30m ahead IST. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for IST and KOST?+
IST is UTC+05:30 (GMT+5:30) and KOST is UTC+11:00 (GMT+11). 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 IST and KOST?+
Yes. There are 3 hours of overlap during standard 9am-5pm working hours, with the strongest window at 09:00–11:00 IST.