IST to WEST Converter
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Add one or more places to compare local times, adjust the date, and share the result.
Quick answers
Selected conversion
5:30 pm17:30 IST (UTC+5:30), Oct 17, 2026 = 1:00 pm13:00 WEST (UTC+1), Oct 17, 2026
IST is 4 hours and 30 minutes ahead of WEST.
IST and WEST examples
These examples always use IST (UTC+5:30) and WEST (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 WEST.
How the time difference changes
For most of the year, IST is 4 hours and 30 minutes ahead of WEST. From Oct 25, 2026 to Mar 28, 2027, IST is 5 hours and 30 minutes ahead of WET.
For most of the year, working hours of 9:00 am to 6:00 pm in IST correspond to 4:30 am to 1:30 pm in WEST. At other times of the year, working hours of 9:00 am to 6:00 pm in IST correspond to 3:30 am to 12:30 pm in WET.For most of the year, working hours of 09:00 to 18:00 in IST correspond to 04:30 to 13:30 in WEST. At other times of the year, working hours of 09:00 to 18:00 in IST correspond to 03:30 to 12:30 in WET.
Compare IST time with WEST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
India Standard Time is 4 hours and 30 minutes ahead of Western European Summer Time.
5:30 pm17:30 in IST is 1:00 pm13:00 in WEST
IST to WEST call time
Best time for a conference call or a meeting is between 1:30pm-6pm13:30-18:00 in IST which corresponds to 9am-1:30pm09:00-13:30 in WEST
5:30 pm17:30 India Standard Time (IST). Offset UTC +5:30 hours
1:00 pm13:00 Western European Summer Time (WEST). Offset UTC +1:00 hour
5:30 pm17:30 IST / 1:00 pm13:00 WEST
Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.
| IST | WEST |
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| 7:30pm previous day | |
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India Standard Time
Offset: IST is 5 hours and 30 minutes ahead of Greenwich Mean Time (GMT).
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, Bengaluru, Hyderabad, Ahmedabad.
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.
Current time in India: India time now
IST representations, usage and related time zones
- +0530 - basic
- +05:30 - extended
- +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.
- Asia/Calcutta
- Asia/Kolkata
- India Standard Time - UTC +5:30
- Irish Standard Time - UTC +1
- Israel Standard Time - UTC +2
Western European Summer Time
Offset: WEST is 1 hour ahead of Greenwich Mean Time (GMT).
Countries using this time zone: Faroe Islands, Portugal, Spain
Principal Cities: The largest city in the WEST time zone is Lisbon in Portugal, with about 517,802 people. Other major cities in this time zone include Las Palmas de Gran Canaria, Porto, Santa Cruz de Tenerife, Braga.
German: WESZ - Westeuropäische Sommerzeit
Today all shaded areas are on WEST.
Daylight Saving: Western European Summer Time (WEST) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Western European Time (WET).
Start: Western European Summer Time (WEST) started on Sunday, March 29, 2026 at 1:00 am01:00 local time and clocks were set one hour forward to Sunday, March 29, 2026, 2:00 am02:00. Daylight saving starts annually on the last Sunday of March.
End: Western European Summer Time (WEST) ends on Sunday, October 25, 2026 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, October 25, 2026, 1:00 am01:00 local standard time instead. Daylight saving ends annually on the last Sunday of October.
See Portugal daylight saving time and upcoming clock changes worldwide.
WEST representations, usage and related time zones
- +01 - basic short
- +0100 - basic
- +01:00 - extended
- +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.
- Alpha - Military abbreviation for WEST
- A - short form of 'Alpha'
- Atlantic/Canary
- Atlantic/Faeroe
- Atlantic/Faroe
- Atlantic/Madeira
- Europe/Lisbon
- Portugal
- WET
- 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