KOST to IST Time Converter

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

Tofol · Kosrae Time
18:14:15
Tuesday, May 12, 2026
GMT+11 · UTC+11:00
Mumbai · India Standard Time
12:44:15
Tuesday, May 12, 2026
GMT+5:30 · UTC+05:30

Convert a specific time

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

Daylight Saving status right now

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

When can KOST and IST meet?

00
01
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09
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KOST
IST
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Tofol (KOST). Each row shows the local working-hours state in that zone for the same moment in time.
2 hours of overlap during standard 9am-5pm working hours.
Best meeting window: 15:00–16:00 KOST (09:30–10:30 IST).

Hour-by-hour KOST to IST conversion table

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

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

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

Related converters

IST to KOST (reverse)KOST to ESTKOST to PSTKOST to GMTKOST to UTCKOST to CETEST to ISTPST to ISTGMT to ISTUTC to ISTCET to IST
Looking for local time? See time in Tofol or time in Mumbai.

Frequently asked questions

What is the time difference between KOST and IST right now?+
IST (India Standard Time) is currently 5h 30m behind KOST (Kosrae Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does KOST or IST observe daylight saving time?+
KOST: does not observe daylight saving time. IST: does not observe daylight saving time.
When is the best time to schedule a meeting between KOST and IST?+
The strongest overlap is 15:00–16:00 KOST (09:30–10:30 IST), giving 2 hours when both sides are within standard 9am-5pm working hours.
What time is it in Mumbai when it is 12:00 noon in Tofol?+
When it is 12:00 Tue in Tofol (KOST), it is 06:30 Tue in Mumbai (IST).
Which IANA time zone identifiers are used for KOST and IST?+
KOST maps to "Pacific/Kosrae" 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 Tofol ahead of or behind Mumbai?+
Whether Tofol (KOST) is ahead of or behind Mumbai (IST) depends on the current UTC offsets. Right now IST is 5h 30m behind KOST. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for KOST and IST?+
KOST is UTC+11:00 (GMT+11) 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 KOST and IST?+
Yes. There are 2 hours of overlap during standard 9am-5pm working hours, with the strongest window at 15:00–16:00 KOST.