Chicago to Tehran time converter

Tehran is 8 hours 30 minutes ahead of Chicago. When it is 9:00 AM in Chicago, it is 5:30 PM in Tehran.

Chicago CDT

Saturday, October 17, 2026

Tehran IRST

Saturday, October 17, 2026

Chicago
Illinois, United States
Sat, Oct 17
CDTUTC-5
Tehran
Iran
Sat, Oct 17
IRSTUTC+3:30+8h 30m
Finding your time zone…
Shared working hours (9:00–18:00)

Chicago to Tehran conversion table

Every hour of today in Chicago and the matching time in Tehran. Light rows are typical working hours (9:00–18:00).

ChicagoTehran
12:00 AM8:30 AM
1:00 AM9:30 AM
2:00 AM10:30 AM
3:00 AM11:30 AM
4:00 AM12:30 PM
5:00 AM1:30 PM
6:00 AM2:30 PM
7:00 AM3:30 PM
8:00 AM4:30 PM
9:00 AM5:30 PM
10:00 AM6:30 PM
11:00 AM7:30 PM
12:00 PM8:30 PM
1:00 PM9:30 PM
2:00 PM10:30 PM
3:00 PM11:30 PM
4:00 PM12:30 AM+1 day
5:00 PM1:30 AM+1 day
6:00 PM2:30 AM+1 day
7:00 PM3:30 AM+1 day
8:00 PM4:30 AM+1 day
9:00 PM5:30 AM+1 day
10:00 PM6:30 AM+1 day
11:00 PM7:30 AM+1 day

Best time to call or meet

Working hours don't overlap fully. The closest fit is 7:00 AM – 1:30 PM in Chicago (3:30 PM – 10:00 PM in Tehran): working hours on one side, early or late on the other.

Daylight saving time and the difference

The difference changes during the year because Chicago and Tehran switch clocks on different dates:

  • Oct 17, 2026 – Nov 1, 2026: +8h 30m
  • Nov 1, 2026 – Mar 14, 2027: +9h 30m
  • Mar 14, 2027 – Oct 17, 2027: +8h 30m

Distance

Chicago and Tehran are 10,440 km (6,487 miles) apart in a straight line.

More conversions

Tehran to ChicagoChicago to New YorkChicago to LondonChicago to Los AngelesChicago to TorontoChicago to São PauloChicago to ParisChicago to BerlinChicago to MoscowChicago to DubaiChicago to New DelhiChicago to BangkokChicago to Singapore
New York to TehranLondon to TehranLos Angeles to TehranToronto to TehranSão Paulo to TehranParis to TehranBerlin to TehranMoscow to TehranDubai to TehranNew Delhi to TehranBangkok to TehranSingapore to Tehran

Questions and answers

What is the time difference between Chicago and Tehran?

Tehran is 8 hours 30 minutes ahead of Chicago.

What time is it in Tehran when it is 9 AM in Chicago?

When it is 9:00 AM in Chicago, it is 5:30 PM in Tehran.

When is the best time to call Tehran from Chicago?

Working hours don't overlap fully. The closest fit is 7:00 AM – 1:30 PM in Chicago (3:30 PM – 10:00 PM in Tehran): working hours on one side, early or late on the other.

Does the time difference between Chicago and Tehran change?

Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.