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IST to WST Converter

Updating current time…
IST
India Standard Time
GMT +5:30
12am
3am
6am
9am
12pm
3pm
6pm
9pm
WT/WST
Western Sahara Standard Time
GMT +0
12am
3am
6am
9am
12pm
3pm
6pm
9pm
WST is not used on this date.

This converter uses WT (UTC+0), as in El Aaiun.

Keep WST (UTC+1)

Quick answers

Selected conversion

5:30 pm17:30 IST (UTC+5:30), Oct 10, 2026 = 12:00 pm12:00 WT (UTC+0), Oct 10, 2026

IST is 5 hours and 30 minutes ahead of WT.

IST and WST examples

These examples always use IST (UTC+5:30) and WST (UTC+1). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

IST is 4 hours and 30 minutes ahead of WST.

How the time difference changes

In 2026, IST is 4 hours and 30 minutes ahead of WST for most of the year. At other times that year, IST is 5 hours and 30 minutes ahead of WT.

In 2026, working hours of 9:00 am to 5:00 pm in IST correspond to 4:30 am to 12:30 pm in WST for most of the year. At other times that year, working hours of 9:00 am to 5:00 pm in IST correspond to 3:30 am to 11:30 am in WT.In 2026, working hours of 09:00 to 17:00 in IST correspond to 04:30 to 12:30 in WST for most of the year. At other times that year, working hours of 09:00 to 17:00 in IST correspond to 03:30 to 11:30 in WT.

Compare IST time with WST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

India Standard Time is 5 hours and 30 minutes ahead of Western Sahara Standard Time.
5:30 pm17:30 in IST is 12:00 pm12:00 in WT

IST to WT call time
Best time for a conference call or a meeting is between 2:30pm-5pm14:30-17:00 in IST which corresponds to 9am-11:30am09:00-11:30 in WT

5:30 pm17:30 India Standard Time (IST). Offset UTC +5:30 hours
12:00 pm12:00 Western Sahara Standard Time (WT). Offset UTC 0:00 hours

5:30 pm17:30 IST / 12:00 pm12:00 WT

ISTWT
12:00am6:30pm
1:00am7:30pm
2:00am8:30pm
3:00am9:30pm
4:00am10:30pm
5:00am11:30pm
6:00am12:30am
7:00am1:30am
8:00am2:30am
9:00am3:30am
10:00am4:30am
11:00am5:30am
12:00pm6:30am
1:00pm7:30am
2:00pm8:30am
3:00pm9:30am
4:00pm10:30am
5:00pm11:30am
6:00pm12:30pm
7:00pm1:30pm
8:00pm2:30pm
9:00pm3:30pm
10:00pm4:30pm
11:00pm5:30pm
00:0018:30
01:0019:30
02:0020:30
03:0021:30
04:0022:30
05:0023:30
06:0000:30
07:0001:30
08:0002:30
09:0003:30
10:0004:30
11:0005:30
12:0006:30
13:0007:30
14:0008:30
15:0009:30
16:0010:30
17:0011:30
18:0012:30
19:0013:30
20:0014:30
21:0015:30
22:0016:30
23:0017:30

India Standard Time

Offset: IST is 5 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Asia

Countries using this time zone: India

Principal Cities: The largest city in the IST time zone is Mumbai in India, with about 12.692 million people. Other major cities in this time zone include Delhi, Bangalore, Chennai, Kolkata.

Daylight Saving: Clocks in India Standard Time (IST) do not change for daylight saving time, so IST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.

IST Time Zone Geo Map
IST timezone map

IST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +0530 - basic
  • +05:30 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0530 - sign character (+) followed by a four digit time providing hours (05) and minutes (30) of the offset. Indicates an offset of five hours and thirty minutes to the east of the zero meridian.
IANA/Olson: Reflects IST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Asia/Calcutta
  • Asia/Kolkata
IST Abbreviation: Several time zones share IST abbreviation and it could refer to these time zones
  • India Standard Time - UTC +5:30
  • Irish Standard Time - UTC +1
  • Israel Standard Time - UTC +2

Western Sahara Summer Time

Offset: WST is 1 hour ahead Greenwich Mean Time (GMT) and is used in Africa

Greenwich Mean Time (GMT) originally referred to the mean solar time at the Royal Observatory in Greenwich, London. It is now often used to refer to Coordinated Universal Time (UTC) when this is viewed as a time zone, and in casual use for the most parts it is the same. In military GMT is known as Zulu time.Greenwich Mean Time was the same as Universal Time (UT), until the introduction of UTC in 1972 a standard astronomical concept used in many technical fields.

WST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +01 - basic short
  • +0100 - basic
  • +01:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0100 - sign character (+) followed by a four digit time providing hours (01) and minutes (00) of the offset. Indicates an offset of one hour to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Alpha - Military abbreviation for WST
  • A - short form of 'Alpha'
WST Abbreviation: Several time zones share WST abbreviation and it could refer to these time zones
  • Western Sahara Summer Time - UTC +1
  • West Samoa Time - UTC +13
Time zones with the GMT +1 offset:
  • BST - British Summer Time
  • CET - Central European Time
  • IST - Irish Standard Time
  • WEST - Western European Summer Time
  • A - Alpha Time Zone
  • CET - Central European Time
  • MEZ - Mitteleuropäische Zeit
  • WAT - West Africa Time
  • WST - Western Sahara Summer Time
  • BMT - Biel Mean Time
EST to ISTGMT to ESTPST to ESTEST to GMTPST to GMT