IRST to Karachi
+1h 30mIRST
IRSTSOURCEKarachi
PKTGreen rows indicate typical business hours (9 AM - 5 PM)
IRST and PKT on the World Map
The map below highlights the IRST (Iran Standard Time) and PKT (Pakistan Standard Time) timezone regions across the globe.
IRST – Iran Standard Time
UTC+03:30Iran Standard Time (IRST) is the time zone for Iran, 3 hours and 30 minutes ahead of UTC.
- •IRST is one of only a few time zones with a 30-minute offset.
- •Iran observes daylight saving time, switching to IRDT (UTC+04:30).
- •Tehran has a metropolitan population of over 16 million.
PKT – Pakistan Standard Time
UTC+05:00Pakistan Standard Time (PKT) is the time zone for Pakistan, 5 hours ahead of UTC.
- •Pakistan does not observe daylight saving time.
- •Karachi is one of the world's most populous cities.
- •PKT is the same offset as Uzbekistan (UZT) and Yekaterinburg (YEKT).
About Karachi
WikipediaKarachi operates on Pakistan Standard Time (PKT), UTC+5. As Pakistan's financial hub and largest port city, Karachi time drives South Asian commerce.
Karachi is one of the fastest-growing megacities in the world.
Everything You Need to Know About IRST and Karachi Time
IRST runs on Iran Standard Time (IRST) at UTC+03:30. Karachi runs on Pakistan Standard Time (PKT) at UTC+05:00. That puts IRST 1 hour 30 minutes ahead of Karachi — a difference of +1h 30m at the current offsets.
In practice, when it is 9:00 AM in IRST it is 10:30 AM in Karachi. Midnight in IRST is 1:30 AM in Karachi. Neither zone observes daylight saving time, so the offset between them stays constant all year.
IRST to Karachi time conversion table
| IRST (IRST) | Karachi (PKT) | Day |
|---|---|---|
| 12:00 AM | 1:30 AM | same day |
| 6:00 AM | 7:30 AM | same day |
| 7:00 AM | 8:30 AM | same day |
| 8:00 AM | 9:30 AM | same day |
| 9:00 AM | 10:30 AM | same day |
| 12:00 PM | 1:30 PM | same day |
| 3:00 PM | 4:30 PM | same day |
| 5:00 PM | 6:30 PM | same day |
| 6:00 PM | 7:30 PM | same day |
| 9:00 PM | 10:30 PM | same day |
Why people convert IRST to Karachi time
- Scheduling a call from IRST to Karachi: a 10:00 AM start in IRST lands at 11:30 AM in Karachi, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both IRST and Karachi are inside the 9-to-5 working day between 9:00 AM and 3:30 PM IRST time (10:30 AM–5:00 PM PKT). That is roughly 6 hours 30 minutes of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in IRST is 9:30 PM in Karachi makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM IRST" is unambiguous; "3 PM" across a +1h 30m gap is not.
- Block 9:00 AM–3:30 PM IRST as the recurring meeting window if you work primarily from IRST and need Karachi colleagues present.
About IRST (Iran Standard Time)
Iran Standard Time (IRST) is one of the few time zones with a 30-minute offset. Iran observes daylight saving time (IRDT, UTC+04:30) from late March to late September. Tehran, the capital, is one of the largest cities in the Middle East.
About PKT (Pakistan Standard Time)
Pakistan Standard Time (PKT) is the time zone used throughout Pakistan. PKT does not observe daylight saving time. Pakistan is the 5th most populous country in the world.
Best time to call between IRST and Karachi
Both IRST and Karachi sit inside the 9 AM – 5 PM working day between 9:00 AM–3:30 PM IRST, which is 10:30 AM–5:00 PM PKT. That gives roughly 6 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
IRST and Karachi share 6 hours of working-hours overlap (9:00 AM–3:30 PM IRST), so scheduling a live meeting is straightforward.
IRST is 1 hour 30 minutes ahead of Karachi (IRST UTC+03:30 → PKT UTC+05:00). The shared working window is 9:00 AM–3:30 PM IRST. Remember to re-check around daylight-saving transitions.
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between IRST and Karachi?
IRST (IRST, UTC+03:30) is 1 hour 30 minutes ahead of Karachi (PKT, UTC+05:00). The gap is currently +1h 30m.
How do I convert IRST time to Karachi time?
Add +1h 30m to IRST local time. For example, 9:00 AM in IRST is 10:30 AM in Karachi.
What time is it in Karachi right now?
Karachi uses PKT at UTC+05:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +1h 30m offset from IRST.
What is the best time to call Karachi from IRST?
Call between 9:00 AM and 3:30 PM IRST — that maps to 10:30 AM–5:00 PM PKT and keeps both parties inside the working day.
Which is ahead, IRST or Karachi?
IRST is 1 hour 30 minutes ahead of Karachi. When it is 12:00 PM in IRST it is 1:30 PM in Karachi.
Do IRST and Karachi use different time zones?
IRST uses IRST at UTC+03:30, while Karachi (Pakistan) uses PKT at UTC+05:00. The IANA identifiers are Asia/Tehran and Asia/Karachi.
Does daylight saving time affect the IRST–Karachi difference?
Neither zone observes daylight saving time, so the +1h 30m offset between IRST and Karachi is fixed all year.
Which other cities share IRST's time zone?
IRST also covers Tehran, Isfahan, Mashhad, Tabriz, Shiraz, Karaj.
Which countries use IRST, IRST's zone?
IRST is used in Iran.
Is there a day difference between IRST and Karachi?
Not normally. The +1h 30m gap only pushes the date over for late-evening times.
What is the time difference between IRST and Karachi?
Karachi is +1h 30m from IRST.
What timezone is IRST in?
IRST operates on its local timezone.
What timezone is Karachi in?
Karachi operates on Pakistan Standard Time (PKT), UTC+5. As Pakistan's financial hub and largest port city, Karachi time drives South Asian commerce.
What are the business hours in Karachi?
Standard business hours in Karachi are 9:00 AM - 5:00 PM PKT.
Which countries use IRST (Iran Standard Time)?
IRST is used in Iran.
Does IRST observe daylight saving time?
Yes, IRST switches to IRDT during summer months.
What are some interesting facts about IRST?
IRST is one of only a few time zones with a 30-minute offset. Iran observes daylight saving time, switching to IRDT (UTC+04:30).
Which cities are in the PKT timezone?
Major cities in the PKT timezone include Karachi, Lahore, Islamabad, Rawalpindi, Faisalabad, Peshawar.
What is the UTC offset for PKT?
Pakistan Standard Time (PKT) is at UTC+05:00.
What should I know about the PKT timezone?
Pakistan does not observe daylight saving time. Karachi is one of the world's most populous cities.
When is it midnight in IRST, what time is it in Karachi?
When it is 12:00 AM (midnight) in IRST (IRST), it is +1h 30m later in Karachi (PKT).
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