Chicago to Iran Time Converter

Chicago is 8.5 hours behind Iran

ClockinSync

BASE

09:00

Work Clients Team +

00:0006:0012:0018:0024:00

Iran

Iran · +8.5h

17:30

London

United Kingdom · +6h

15:00

New York

USA · +1h

10:00

Tokyo

Japan · +14h

23:00

Dubai

United Arab Emirates · +9h

18:00

Chicago to Iran — exact time difference

Chicago is 9 hours 30 minutes behind Iran. Midday in Chicago lines up with 20:00 in Iran.

Chicago is in the America/Chicago timezone. Iran is in Asia/Tehran. The difference is 8.5 hours 30 minutes.

Working hours overlap

Chicago and Iran have no shared working hours under a standard 9:00–17:00 schedule. One side will always need to join at an off-hour.

When to schedule across time zones

Since Chicago and Iran don't share working hours, these are the most practical options available.

08:00 Chicago / 16:00 Tehran⚡ One side off-hours

⚠️ 1h before working hours in Chicago

09:00 Chicago / 17:00 Tehran⚡ One side off-hours

⚠️ 1h after working hours in Tehran

07:00 Chicago / 15:00 Tehran⚡ One side off-hours

⚠️ 2h before working hours in Chicago

Based on standard 09:00–17:00 working hours in each location's local time.

Upcoming public holidays

Chicago6 holidays

Sep 7Labour Day

Oct 12Columbus Day

Oct 12Indigenous Peoples' Day

Nov 11Veterans Day

Nov 26Thanksgiving Day

Iran

No upcoming public holidays this year.

How to work with Chicago and Iran time zones

Working across Chicago (USA) and Iran (Iran) is a challenge — the 8.5-hour difference means no shared business hours window under a standard schedule. Flexibility from at least one side is required.

💡 How to schedule across these time zones

⚡

When Chicago is at 08:00, Iran reads 16:00 — 1h before working hours in Chicago.

⚡

When Chicago is at 09:00, Iran reads 17:00 — 1h after working hours in Tehran.

⚡

When Chicago is at 07:00, Iran reads 15:00 — 2h before working hours in Chicago.

Since there is no natural overlap, the options above represent the most balanced compromise, minimizing out-of-hours inconvenience for both sides.

DST transitions can silently shift your meeting times by an hour. The ClockinSync Chrome Extension tracks these changes automatically so you never get caught off guard.

Get the Extension — Free →

Use the time slider above to find the exact equivalent time for any moment in Chicago. The input bar accepts natural language like "3pm", "15:30", or "9am Rome" for instant conversions.

Chicago ↔ Iran

No overlap — one side will join outside working hours

Chicago

Iran

00:00

08:30

01:00

09:30Working

02:00

10:30Working

03:00

11:30Working

04:00

12:30Working

05:00

13:30Working

06:00

14:30Working

07:00

15:30Working

08:00

16:30Working

09:00Working

17:30off

10:00Working

18:30off

11:00Working

19:30off

12:00Working

20:30off

13:00Working

21:30off

14:00Working

22:30off

15:00Working

23:30off

16:00Working

00:30+1doff

17:00

01:30+1d

18:00

02:30+1d

19:00

03:30+1d

20:00

04:30+1d

21:00

05:30+1d

22:00

06:30+1d

23:00

07:30+1d

Working hours: 09:00–17:00 local. Green = both working. Purple = one side only.

Frequently Asked Questions

What is the time difference between Chicago and Iran?

Chicago is 8.5 hours behind Iran.

How do I convert Chicago time to Iran time?

Use the converter above. Drag the slider or type a time to instantly see the equivalent in Iran.

What timezone does Chicago use?

Chicago uses the America/Chicago timezone.

What timezone does Iran use?

Iran uses Asia/Tehran (IRST/IRDT).