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EST to IRST Time Converter

Convert time from EST to IRST. Enter any time to see the equivalent IRST time, compare current EST and IRST times side by side, and find overlapping business hours for calls and meetings.

est Eastern Standard Time
...
irst Iran Standard Time
...
Select a time to convert

est to irst Quick Facts

Use this EST to IRST converter to compare US East Coast and Iran time, check the 8 hours and 30 minutes gap, and confirm the right slot for calls, handoffs, and deadlines. Good overlap starts around 9:00 AM EST / 5:30 PM IRST.

Time Difference
Iran Standard Time is 8 hours and 30 minutes ahead of Eastern Standard Time
Useful when deadlines, handoffs, or calls cross workday boundaries.
Best Call Window
Best overlap starts around 9:00 AM est and 5:30 PM irst.
Common Use Cases
Useful for remote teams, customer support windows, travel planning, webinars, and same-day deadline handoffs.

How to Convert est to irst

Converting between Eastern Standard Time and Iran Standard Time means accounting for a 8 hours and 30 minutes gap — here's how to do it in under 10 seconds with no sign-up.

Enter Your est Time

Pick the date and time in Eastern Standard Time (UTC -5) that you want to convert. Hit "Now" to load the current est time instantly, or use "+1h" to step forward and compare.

Read the irst Result

The equivalent Iran Standard Time (UTC +3:30) time appears immediately. Since irst is 8 hours and 30 minutes ahead of est, most daytime conversions stay on the same calendar day.

Copy or Fine-Tune

Click "Copy Time" to grab the irst result for your calendar or message. Use "+1d" to check how the conversion shifts across dates — useful when Daylight Saving Time changes the gap.

Why Choose Our est to irst Converter

Align est–irst Meetings Instantly

When someone in United States suggests 9:00 AM est, that's 5:30 PM irst. This converter shows the overlap so both sides agree on one slot — no back-and-forth.

Spot Date-Line Shifts at a Glance

Late-night est times can land on a different date in irst because of the 8 hours and 30 minutes offset. The converter labels "next day" or "previous day" next to the result so you never send a message a day early or miss a deadline.

Handles DST Transitions Automatically

The half-hour offset between est (UTC -5) and irst (UTC +3:30) already makes mental math tricky — add Daylight Saving Time and the gap can shift further. This converter uses live UTC offsets, so you're always accurate.

Never Miss a est-Timed Event

Product launches, sports matches, and webinars are often announced in est. Convert the event time to irst so you know exactly when to tune in — with a 8 hours and 30 minutes difference, a morning event in United States falls during work hours in Iran.

est to irst Time Conversion Chart

Quick-reference conversion table covering every hour of the day at a glance.

Complete 24-Hour Conversion

Eastern Standard Time to Iran Standard Time full day schedule

12:00 AM
est
→
8:30 AM
irst
1:00 AM
est
→
9:30 AM
irst
2:00 AM
est
→
10:30 AM
irst
3:00 AM
est
→
11:30 AM
irst
4:00 AM
est
→
12:30 PM
irst
5:00 AM
est
→
1:30 PM
irst
6:00 AM
est
→
2:30 PM
irst
7:00 AM
est
→
3:30 PM
irst
8:00 AM
est
→
4:30 PM
irst
9:00 AM
est
→
5:30 PM
irst
10:00 AM
est
→
6:30 PM
irst
11:00 AM
est
→
7:30 PM
irst
12:00 PM
est
→
8:30 PM
irst
1:00 PM
est
→
9:30 PM
irst
2:00 PM
est
→
10:30 PM
irst
3:00 PM
est
→
11:30 PM
irst
4:00 PM
est
→
12:30 AM
irst
(next day)
5:00 PM
est
→
1:30 AM
irst
(next day)
6:00 PM
est
→
2:30 AM
irst
(next day)
7:00 PM
est
→
3:30 AM
irst
(next day)
8:00 PM
est
→
4:30 AM
irst
(next day)
9:00 PM
est
→
5:30 AM
irst
(next day)
10:00 PM
est
→
6:30 AM
irst
(next day)
11:00 PM
est
→
7:30 AM
irst
(next day)
The two zones in context

EST vs IRST — cities and working rhythm

EST — Eastern Standard Time
Primary cities: New York, Toronto, Miami, Atlanta, Washington DC

US East Coast — the reference clock for US business, Wall Street, US law and consulting firms, most Fortune 500 HQ. Business hours 9 AM – 6 PM ET. Note: EST is the winter offset (UTC-5); EDT (UTC-4) is the summer offset — "ET" is the year-round non-committal way to refer to this zone in scheduling apps.

Popular est Time Converters

Explore more est conversions for major business and travel corridors. Each page includes a 24-hour chart, time difference summary, and meeting overlap guidance.

Convert Other Time Zones to irst

Find the time difference from any major zone into Iran Standard Time. Use these pages when scheduling with Iran from a different region.

🌍 Swap direction — IRST to EST Converter
Reviewed by Editorial team Updated