IST to WAT Time Converter

Convert India Standard Time (IST) to West Africa Time (WAT). Both time zones are shown live below; current offset between them is 4h 30m behind.

Mumbai · India Standard Time
21:39:28
Wednesday, May 13, 2026
GMT+5:30 · UTC+05:30
Lagos · West Africa Time
17:09:28
Wednesday, May 13, 2026
GMT+1 · UTC+01:00

Convert a specific time

From: IST (Mumbai)
To: WAT (Lagos)
--:--

Daylight Saving status right now

IST (India Standard Time)
Observes DST
No
WAT (West Africa Time)
Observes DST
No

When can IST and WAT meet?

00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
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23
IST
WAT
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: 14:00–16:00 IST (09:30–11:30 WAT).

Hour-by-hour IST to WAT conversion table

IST time (Mumbai)WAT time (Lagos)Status
00:00 Wed19:30 TueOff-hours both sides
01:00 Wed20:30 TueOff-hours both sides
02:00 Wed21:30 TueOff-hours both sides
03:00 Wed22:30 TueOff-hours both sides
04:00 Wed23:30 TueOff-hours both sides
05:00 Wed00:30 WedOff-hours both sides
06:00 Wed01:30 WedOff-hours both sides
07:00 Wed02:30 WedOff-hours both sides
08:00 Wed03:30 WedOff-hours both sides
09:00 Wed04:30 WedIST working
10:00 Wed05:30 WedIST working
11:00 Wed06:30 WedIST working
12:00 Wed07:30 WedIST working
13:00 Wed08:30 WedIST working
14:00 Wed09:30 WedBoth at work
15:00 Wed10:30 WedBoth at work
16:00 Wed11:30 WedBoth at work
17:00 Wed12:30 WedWAT working
18:00 Wed13:30 WedWAT working
19:00 Wed14:30 WedWAT working
20:00 Wed15:30 WedWAT working
21:00 Wed16:30 WedWAT working
22:00 Wed17:30 WedOff-hours both sides
23:00 Wed18:30 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
West Africa Time (WAT)
IANA identifier
Africa/Lagos
Current UTC offset
UTC+01:00
Current abbreviation
GMT+1
Major cities in this zone
LagosAbuja

Sun today in Mumbai and Lagos

Mumbai
Sunrise
06:06
Sunset
19:06
Solar noon
12:36
Daylight
13h 0m
Lagos
Sunrise
06:31
Sunset
18:56
Solar noon
12:44
Daylight
12h 24m

Related converters

WAT to IST (reverse)IST to ESTIST to PSTIST to GMTIST to UTCIST to CETEST to WATPST to WATGMT to WATUTC to WATCET to WAT
Looking for local time? See time in Mumbai or time in Lagos.

Frequently asked questions

What is the time difference between IST and WAT right now?+
WAT (West Africa Time) is currently 4h 30m behind 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 WAT observe daylight saving time?+
IST: does not observe daylight saving time. WAT: does not observe daylight saving time.
When is the best time to schedule a meeting between IST and WAT?+
The strongest overlap is 14:00–16:00 IST (09:30–11:30 WAT), giving 3 hours when both sides are within standard 9am-5pm working hours.
What time is it in Lagos when it is 12:00 noon in Mumbai?+
When it is 12:00 Wed in Mumbai (IST), it is 07:30 Wed in Lagos (WAT).
Which IANA time zone identifiers are used for IST and WAT?+
IST maps to "Asia/Kolkata" in the IANA database. WAT maps to "Africa/Lagos". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Mumbai ahead of or behind Lagos?+
Whether Mumbai (IST) is ahead of or behind Lagos (WAT) depends on the current UTC offsets. Right now WAT is 4h 30m behind IST. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for IST and WAT?+
IST is UTC+05:30 (GMT+5:30) and WAT is UTC+01:00 (GMT+1). 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 WAT?+
Yes. There are 3 hours of overlap during standard 9am-5pm working hours, with the strongest window at 14:00–16:00 IST.