Karachi to IRST
-1h 30mKarachi
PKTSOURCEIRST
IRSTGreen rows indicate typical business hours (9 AM - 5 PM)
PKT and IRST on the World Map
The map below highlights the PKT (Pakistan Standard Time) and IRST (Iran Standard Time) timezone regions across the globe.
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).
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.
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.
Comparing Time Zones: Karachi and IRST
Karachi runs on Pakistan Standard Time (PKT) at UTC+05:00. IRST runs on Iran Standard Time (IRST) at UTC+03:30. That puts Karachi 1 hour 30 minutes behind IRST — a difference of -1h 30m at the current offsets.
In practice, when it is 9:00 AM in Karachi it is 7:30 AM in IRST. Midnight in Karachi is 10:30 PM in IRST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Karachi to IRST time conversion table
| Karachi (PKT) | IRST (IRST) | Day |
|---|---|---|
| 12:00 AM | 10:30 PM | previous day |
| 6:00 AM | 4:30 AM | same day |
| 7:00 AM | 5:30 AM | same day |
| 8:00 AM | 6:30 AM | same day |
| 9:00 AM | 7:30 AM | same day |
| 12:00 PM | 10:30 AM | same day |
| 3:00 PM | 1:30 PM | same day |
| 5:00 PM | 3:30 PM | same day |
| 6:00 PM | 4:30 PM | same day |
| 9:00 PM | 7:30 PM | same day |
Why people convert Karachi to IRST time
- Scheduling a call from Karachi to IRST: a 10:00 AM start in Karachi lands at 8:30 AM in IRST, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Karachi and IRST are inside the 9-to-5 working day between 10:30 AM and 5:00 PM PKT time (9:00 AM–3:30 PM IRST). That is roughly 6 hours 30 minutes of usable overlap.
- Coordinating a Karachi-based team with IRST contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.
- Always state the zone abbreviation, not just the hour. "3:00 PM PKT" is unambiguous; "3 PM" across a -1h 30m gap is not.
- Block 10:30 AM–5:00 PM PKT as the recurring meeting window if you work primarily from Karachi and need IRST colleagues present.
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.
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.
Best time to call between Karachi and IRST
Both Karachi and IRST sit inside the 9 AM – 5 PM working day between 10:30 AM–5:00 PM PKT, which is 9:00 AM–3:30 PM IRST. That gives roughly 6 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
Karachi and IRST share 6 hours of working-hours overlap (10:30 AM–5:00 PM PKT), so scheduling a live meeting is straightforward.
Karachi is 1 hour 30 minutes behind IRST (PKT UTC+05:00 → IRST UTC+03:30). The shared working window is 10:30 AM–5:00 PM PKT. 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 Karachi and IRST?
Karachi (PKT, UTC+05:00) is 1 hour 30 minutes behind IRST (IRST, UTC+03:30). The gap is currently -1h 30m.
How do I convert Karachi time to IRST time?
Add -1h 30m to Karachi local time. For example, 9:00 AM in Karachi is 7:30 AM in IRST.
What time is it in IRST right now?
IRST uses IRST at UTC+03:30. Use the live converter at the top of this page — it updates in real time and already accounts for the -1h 30m offset from Karachi.
What is the best time to call IRST from Karachi?
Call between 10:30 AM and 5:00 PM PKT — that maps to 9:00 AM–3:30 PM IRST and keeps both parties inside the working day.
Which is behind, Karachi or IRST?
Karachi is 1 hour 30 minutes behind IRST. When it is 12:00 PM in Karachi it is 10:30 AM in IRST.
Do Karachi and IRST use different time zones?
Karachi (Pakistan) uses PKT at UTC+05:00, while IRST uses IRST at UTC+03:30. The IANA identifiers are Asia/Karachi and Asia/Tehran.
Does daylight saving time affect the Karachi–IRST difference?
Neither zone observes daylight saving time, so the -1h 30m offset between Karachi and IRST is fixed all year.
Which other cities share Karachi's time zone?
PKT also covers Karachi, Lahore, Islamabad, Rawalpindi, Faisalabad, Peshawar.
Which countries use PKT, Karachi's zone?
PKT is used in Pakistan.
Is there a day difference between Karachi and IRST?
Not normally. The -1h 30m gap only pushes the date over the previous day.
What is the time difference between Karachi and IRST?
IRST is -1h 30m from Karachi.
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 timezone is IRST in?
IRST operates on its local timezone.
What are the business hours in Karachi?
Standard business hours in Karachi are 9:00 AM - 5:00 PM PKT.
Which countries use PKT (Pakistan Standard Time)?
PKT is used in Pakistan.
Does PKT observe daylight saving time?
No, PKT does not observe daylight saving time and remains at UTC+05:00 year-round.
What are some interesting facts about PKT?
Pakistan does not observe daylight saving time. Karachi is one of the world's most populous cities.
Which cities are in the IRST timezone?
Major cities in the IRST timezone include Tehran, Isfahan, Mashhad, Tabriz, Shiraz, Karaj.
What is the UTC offset for IRST?
Iran Standard Time (IRST) is at UTC+03:30. During daylight saving time, it shifts to IRDT.
What should I know about the IRST timezone?
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).
When is it midnight in Karachi, what time is it in IRST?
When it is 12:00 AM (midnight) in Karachi (PKT), it is -1h 30m later in IRST (IRST).
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