Time zone converter
IST to IRST
Convert India Time — Mumbai to Iran Time — Tehran — fast, accurate, and daylight-saving aware.
When it's 9:00 AM in Mumbai, it's 7:00 AM in Tehran. Tehran is 2 hours behind Mumbai. Use the converter above to turn any IST time into IRST, or scan the hour-by-hour table below for the full day.
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India Time — Mumbai ·
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Iran Time — Tehran ·
Convert a specific timein Mumbai → — in Tehran
IST to IRST at a glance
9:00 AM IST
7:00 AM
IRST · Tehran
12:00 PM IST
10:00 AM
IRST · Tehran
5:00 PM IST
3:00 PM
IRST · Tehran
Planning a meeting between Mumbai and Tehran
Planning a call between Mumbai and Tehran? The best overlap during a standard 9-to-5 workday runs 11:00 AM–5:00 PM IST (9:00 AM–3:00 PM IRST). Aim for that window to reach both sides during business hours.
Hour-by-hour: Mumbai to Tehran
A full day mapped from IST to IRST.
Frequently asked
Is Tehran ahead of or behind Mumbai?
Tehran is 2 hours behind Mumbai.
What is 12:00 PM IST in IRST?
12:00 PM in Mumbai is 10:00 AM in Tehran.
Does this converter account for daylight saving time?
Yes. Conversions use the IANA time zone database, so IST and IRST automatically reflect the correct daylight-saving offset for the current date.