Convert Iran Standard Time (IRST) to Greenwich Mean Time (GMT) instantly. Free, fast and accurate time zone converter with real-time updates.
| IRST Time | GMT Time |
|---|---|
| 12:00 AM IRST | 8:30 PM GMT |
| 12:30 AM IRST | 9:00 PM GMT |
| 1:00 AM IRST | 9:30 PM GMT |
| 1:30 AM IRST | 10:00 PM GMT |
| 2:00 AM IRST | 10:30 PM GMT |
| 2:30 AM IRST | 11:00 PM GMT |
| 3:00 AM IRST | 11:30 PM GMT |
| 3:30 AM IRST | 12:00 AM GMT |
| 4:00 AM IRST | 12:30 AM GMT |
| 4:30 AM IRST | 1:00 AM GMT |
| 5:00 AM IRST | 1:30 AM GMT |
| 5:30 AM IRST | 2:00 AM GMT |
| 6:00 AM IRST | 2:30 AM GMT |
| 6:30 AM IRST | 3:00 AM GMT |
| 7:00 AM IRST | 3:30 AM GMT |
| 7:30 AM IRST | 4:00 AM GMT |
| 8:00 AM IRST | 4:30 AM GMT |
| 8:30 AM IRST | 5:00 AM GMT |
| 9:00 AM IRST | 5:30 AM GMT |
| 9:30 AM IRST | 6:00 AM GMT |
| 10:00 AM IRST | 6:30 AM GMT |
| 10:30 AM IRST | 7:00 AM GMT |
| 11:00 AM IRST | 7:30 AM GMT |
| 11:30 AM IRST | 8:00 AM GMT |
| 12:00 PM IRST | 8:30 AM GMT |
| 12:30 PM IRST | 9:00 AM GMT |
| 1:00 PM IRST | 9:30 AM GMT |
| 1:30 PM IRST | 10:00 AM GMT |
| 2:00 PM IRST | 10:30 AM GMT |
| 2:30 PM IRST | 11:00 AM GMT |
| 3:00 PM IRST | 11:30 AM GMT |
| 3:30 PM IRST | 12:00 PM GMT |
| 4:00 PM IRST | 12:30 PM GMT |
| 4:30 PM IRST | 1:00 PM GMT |
| 5:00 PM IRST | 1:30 PM GMT |
| 5:30 PM IRST | 2:00 PM GMT |
| 6:00 PM IRST | 2:30 PM GMT |
| 6:30 PM IRST | 3:00 PM GMT |
| 7:00 PM IRST | 3:30 PM GMT |
| 7:30 PM IRST | 4:00 PM GMT |
| 8:00 PM IRST | 4:30 PM GMT |
| 8:30 PM IRST | 5:00 PM GMT |
| 9:00 PM IRST | 5:30 PM GMT |
| 9:30 PM IRST | 6:00 PM GMT |
| 10:00 PM IRST | 6:30 PM GMT |
| 10:30 PM IRST | 7:00 PM GMT |
| 11:00 PM IRST | 7:30 PM GMT |
| 11:30 PM IRST | 8:00 PM GMT |
Greenwich Mean Time (GMT) is 3.5 hours behind Iran Standard Time (IRST). When converting from IRST to GMT, you need to subtract 3.5 hours to get the correct time.
When it's 12:00 PM (noon) in Iran Standard Time, it's 8.5:00 AM in Greenwich Mean Time. This is because GMT is 3.5 hours behind IRST.
When it's 12:00 AM (midnight) in Iran Standard Time, it's 8.5:00 PM in Greenwich Mean Time.
Iran Standard Time (IRST) has a UTC offset of +3.5:00, while Greenwich Mean Time (GMT) has a UTC offset of +0:00.
Simply subtract 3.5 hours to the IRST time. For example, 3:00 PM IRST becomes 11.5:00 AM GMT.
The best time depends on both parties' schedules. A common overlap during business hours (9 AM - 5 PM) would be when it's late afternoon in IRST. Use our converter to find the perfect time.
Daylight Saving Time (DST) observance varies by region. Some areas within Iran Standard Time and Greenwich Mean Time zones may observe DST, which can temporarily change the time difference by 1 hour.
Iran Standard Time (IRST) is used by various countries and regions around the world. The UTC offset of +3.5:00 is shared by multiple time zones.
Greenwich Mean Time (GMT) is used by various countries and regions around the world. With a UTC offset of +0:00, this time zone covers multiple geographic areas.
Yes! Remember that GMT is always 3.5 hours behind IRST. If it's noon in IRST, it's 8.5:00 AM in GMT. Bookmark this page for quick reference!
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