Time Difference

Tehran vs Houston Time Difference

Compare the current local time in Tehran, Iran and Houston, United States.

Live local timeDST awareUTC offsets

From

Tehran

Iran

5:05 AM

Mon, Aug 17

UTC+3:30Asia/Tehran

Difference

8h 30m

Swap

Houston

United States

8:35 PM

Sun, Aug 16

UTC-5America/Chicago

Current difference

Houston is currently 8 hours 30 minutes behind Tehran.

This difference is calculated using the current UTC offsets for both locations and automatically reflects daylight-saving changes.

24-hour comparison

Compare Tehran and Houston hour by hour

See how a full local day in Tehran, Iran maps to Houston, United States. TimeInOne automatically accounts for timezone offsets, date changes and daylight-saving transitions.

24-hour day

Working-hours overlap

There is no direct overlap between typical 9:00 AM–6:00 PM working hours in Tehran and Houston on this date.

Tehran

Asia/Tehran

Houston

America/Chicago

Availability

12:00 AM

Mon, Aug 17

3:30 PM

Previous day

Sun, Aug 16

Night

1:00 AM

Mon, Aug 17

4:30 PM

Previous day

Sun, Aug 16

Night

2:00 AM

Mon, Aug 17

5:30 PM

Previous day

Sun, Aug 16

Night

3:00 AM

Mon, Aug 17

6:30 PM

Previous day

Sun, Aug 16

Night

4:00 AM

Mon, Aug 17

7:30 PM

Previous day

Sun, Aug 16

Night

5:00 AM

Mon, Aug 17

8:30 PM

Previous day

Sun, Aug 16

Night

6:00 AM

Mon, Aug 17

9:30 PM

Previous day

Sun, Aug 16

Night

7:00 AM

Mon, Aug 17

10:30 PM

Previous day

Sun, Aug 16

Night

8:00 AM

Mon, Aug 17

11:30 PM

Previous day

Sun, Aug 16

Night

9:00 AM

Mon, Aug 17

12:30 AM

Mon, Aug 17

Night

10:00 AM

Mon, Aug 17

1:30 AM

Mon, Aug 17

Night

11:00 AM

Mon, Aug 17

2:30 AM

Mon, Aug 17

Night

12:00 PM

Mon, Aug 17

3:30 AM

Mon, Aug 17

Night

1:00 PM

Mon, Aug 17

4:30 AM

Mon, Aug 17

Night

2:00 PM

Mon, Aug 17

5:30 AM

Mon, Aug 17

Night

3:00 PM

Mon, Aug 17

6:30 AM

Mon, Aug 17

Night

4:00 PM

Mon, Aug 17

7:30 AM

Mon, Aug 17

Possible

5:00 PM

Mon, Aug 17

8:30 AM

Mon, Aug 17

Possible

6:00 PM

Mon, Aug 17

9:30 AM

Mon, Aug 17

Possible

7:00 PM

Mon, Aug 17

10:30 AM

Mon, Aug 17

Possible

8:00 PM

Mon, Aug 17

11:30 AM

Mon, Aug 17

Possible

9:00 PM

Mon, Aug 17

12:30 PM

Mon, Aug 17

Night

10:00 PM

Mon, Aug 17

1:30 PM

Mon, Aug 17

Night

11:00 PM

Mon, Aug 17

2:30 PM

Mon, Aug 17

Night

Working-hour labels use a general 9:00 AM–6:00 PM schedule. Individual schedules may differ.

On daylight-saving transition dates, a local day can contain 23 or 25 real hours instead of 24.

Call planning

Best time to call Houston from Tehran

Compare typical business hours in Tehran, Iran and Houston, United States to find a practical time for calls, meetings or international coordination.

No direct business-hours overlap

Flexible scheduling is recommended

Typical 9:00 AM–6:00 PM working hours do not overlap directly between Tehranand Houston. Consider an early-morning or evening call instead.

Other reasonable windows

Tehran

4:00 PM – 9:00 PM

Houston

7:30 AM – 12:30 PM

Recommendations use typical 9:00 AM–6:00 PM business hours and a broader 7:00 AM–9:00 PM acceptable calling window. Individual schedules may differ.

Time difference explained

Tehran and Houston time difference explained

Current local-time relationship

Houston is currently 8 hours and 30 minutes behind Tehran.

Tehran uses Asia/Tehran and currently has an offset of UTC+3:30. Houston uses America/Chicago and currently has an offset of UTC-5.

Working-hours overlap

For a typical 9:00 AM–6:00 PM workday, the cities overlap from 5:30 PM to 6:00 PM in Tehran, corresponding to 9:00 AM–9:30 AM in Houston.

Because UTC offsets can change during the year, always check the selected date when planning an important international call or meeting.

Convert a specific time

Need more than the current difference?

Convert a specific date and local time between Tehran and Houston.

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Local clocks

Explore each city

Current time in Tehran Current time in Houston

FAQ

Tehran to Houston time difference FAQ

Common questions about the current time difference, UTC offsets, daylight-saving changes and practical calling hours between Tehran and Houston.

What is the time difference between Tehran and Houston?

The current time difference between Tehran and Houston is 8h 30m. Houston is currently 8 hours and 30 minutes behind Tehran.

Is Houston ahead of or behind Tehran?

Houston is currently 8 hours and 30 minutes behind Tehran.

What time is it in Houston when it is 9:00 AM in Tehran?

Using the current UTC offsets, 9:00 AM in Tehran corresponds to 12:30 AM in Houston. The exact difference can change when daylight-saving rules change.

What is the best time to call Houston from Tehran?

Typical 9:00 AM–6:00 PM business hours overlap between 5:30 PM and 6:00 PM in Tehran. This corresponds to 9:00 AM–9:30 AM in Houston.

Can the time difference between Tehran and Houston change?

Yes. The time difference can change if Tehran or Houston changes its UTC offset because of daylight-saving or other local time-zone rules. TimeInOne uses the IANA zones Asia/Tehran and America/Chicago for date-aware calculations.