IST to A Converter
Start by searching for a time zone, city, or town.
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 14, 2026 = 1:00 pm13:00 A (UTC+1), Oct 14, 2026
IST is 4 hours and 30 minutes ahead of A.
IST and A examples
These examples always use IST (UTC+5:30) and A (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 A.
How the time difference changes
IST is 4 hours and 30 minutes ahead of A year-round.
Working hours of 9:00 am to 5:00 pm in IST correspond to 4:30 am to 12:30 pm in A.Working hours of 09:00 to 17:00 in IST correspond to 04:30 to 12:30 in A.
Compare IST time with A 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 Alpha Time Zone.
5:30 pm17:30 in IST is 1:00 pm13:00 in A
IST to A call time
Best time for a conference call or a meeting is between 1:30pm-5pm13:30-17:00 in IST which corresponds to 9am-12:30pm09:00-12:30 in A
5:30 pm17:30 India Standard Time (IST). Offset UTC +5:30 hours
1:00 pm13:00 Alpha Time Zone (A). Offset UTC +1:00 hour
5:30 pm17:30 IST / 1:00 pm13:00 A
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 | A |
|---|---|
| 7:30pm previous day | |
| 8:30pm previous day | |
| 9:30pm previous day | |
| 10:30pm previous day | |
| 11:30pm previous day | |
| 12:30am | |
| 1:30am | |
| 2:30am | |
| 3:30am | |
| 4:30am | |
| 5:30am | |
| 6:30am | |
| 7:30am | |
| 8:30am | |
| 9:30am | |
| 10:30am | |
| 11:30am | |
| 12:30pm | |
| 1:30pm | |
| 2:30pm | |
| 3:30pm | |
| 4:30pm | |
| 5:30pm | |
| 6:30pm | |
| 19:30 previous day | |
| 20:30 previous day | |
| 21:30 previous day | |
| 22:30 previous day | |
| 23:30 previous day | |
| 00:30 | |
| 01:30 | |
| 02:30 | |
| 03:30 | |
| 04:30 | |
| 05:30 | |
| 06:30 | |
| 07:30 | |
| 08:30 | |
| 09:30 | |
| 10:30 | |
| 11:30 | |
| 12:30 | |
| 13:30 | |
| 14:30 | |
| 15:30 | |
| 16:30 | |
| 17:30 | |
| 18:30 |
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.
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
Alpha Time Zone
Offset: A is 1 hour ahead of Greenwich Mean Time (GMT).
Daylight Saving: Some places on Alpha Time Zone (A) keep the same time all year, while others use A for only part of the year and change their clocks for daylight saving time; see upcoming clock changes worldwide.
Today some of the lighter areas are on UTC+2 (CEST).
A 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 A
- A - short form of 'Alpha'
- 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