Tehran Time to IST Converter
IST is 2 hours ahead of IRST. 9:00 AM IRST = 11:00 AM IST.
IST is 2 hours ahead of IRST. To convert Tehran Time to IST, add 2 hours to the Tehran Time time: 9:00 AM IRST = 11:00 AM IST.
Tehran Time (Tehran time) is used in Tehran, Iran. IST (India Time) is used in India and Sri Lanka (UTC+5:30, no daylight saving time).
IST here means India Standard Time, not Irish or Israel Standard Time.
Tehran Time to IST time conversion table
Tehran Time to IST on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| Tehran Time | IST | Day |
|---|---|---|
| 12:00 AM IRST | 2:00 AM IST | night |
| 1:00 AM IRST | 3:00 AM IST | night |
| 2:00 AM IRST | 4:00 AM IST | night |
| 3:00 AM IRST | 5:00 AM IST | night |
| 4:00 AM IRST | 6:00 AM IST | — |
| 5:00 AM IRST | 7:00 AM IST | — |
| 6:00 AM IRST | 8:00 AM IST | — |
| 7:00 AM IRST | 9:00 AM IST | — |
| 8:00 AM IRST | 10:00 AM IST | — |
| 9:00 AM IRST | 11:00 AM IST | work hours |
| 10:00 AM IRST | 12:00 PM IST | work hours |
| 11:00 AM IRST | 1:00 PM IST | work hours |
| 12:00 PM IRST | 2:00 PM IST | work hours |
| 1:00 PM IRST | 3:00 PM IST | work hours |
| 2:00 PM IRST | 4:00 PM IST | work hours |
| 3:00 PM IRST | 5:00 PM IST | — |
| 4:00 PM IRST | 6:00 PM IST | — |
| 5:00 PM IRST | 7:00 PM IST | — |
| 6:00 PM IRST | 8:00 PM IST | — |
| 7:00 PM IRST | 9:00 PM IST | — |
| 8:00 PM IRST | 10:00 PM IST | night |
| 9:00 PM IRST | 11:00 PM IST | night |
| 10:00 PM IRST | 12:00 AM IST | next day |
| 11:00 PM IRST | 1:00 AM IST | next day |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert Tehran Time to IST
Add 2 hours to the Tehran Time time to get IST.
Example: 9:00 AM IRST = 11:00 AM IST.
Across midnight: 10:00 PM IRST = 12:00 AM IST (next day). The date changes, so always check the day as well as the hour.
Time difference between Tehran Time and IST
The time difference between Tehran Time and IST is 2 hours all year – IST is ahead of IRST.
Tehran Time and IST during daylight saving time
- Tehran Time does not observe daylight saving time; it stays on UTC+3:30 all year.
- IST does not observe daylight saving time; it stays on UTC+5:30 all year.
Best time for a meeting between Tehran Time and IST
Tehran Time and IST share 6 hours of the 9 AM–5 PM working day. Any time between 9:00 AM and 3:00 PM IRST lands between 11:00 AM and 5:00 PM IST, inside working hours for both.
Tehran Time to IST FAQ
What is the time difference between Tehran Time and IST?
IST is 2 hours ahead of IRST all year. 9:00 AM IRST = 11:00 AM IST.
What is 9 AM Tehran Time in IST?
9:00 AM IRST is 11:00 AM IST.
What is 12 PM (noon) Tehran Time in IST?
12:00 PM IRST is 2:00 PM IST.
Is IST ahead of or behind Tehran Time?
IST is 2 hours ahead of IRST, so it is later in IST than in Tehran Time.
Does Tehran Time change for daylight saving time?
No. Tehran Time stays on the same offset all year, so conversions never shift for daylight saving time.
Does IST change for daylight saving time?
No. IST stays on the same offset all year, so conversions never shift for daylight saving time.
What is the best time for a meeting between Tehran Time and IST?
Tehran Time and IST share 6 hours of the 9 AM–5 PM working day. Any time between 9:00 AM and 3:00 PM IRST lands between 11:00 AM and 5:00 PM IST, inside working hours for both.
Related conversions
Convert IST to Tehran Time
Convert Tehran Time to other time zones
Convert other time zones to IST
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.