ACST to Karachi
-4h 30mACST
ACSTSOURCEKarachi
PKTGreen rows indicate typical business hours (9 AM - 5 PM)
ACST and PKT on the World Map
The map below highlights the ACST (Australian Central Standard Time) and PKT (Pakistan Standard Time) timezone regions across the globe.
ACST – Australian Central Standard Time
UTC+09:30Australian Central Standard Time (ACST, UTC+09:30) covers South Australia and the Northern Territory, on a half-hour offset.
- •ACST uses a half-hour offset: UTC+09:30.
- •South Australia moves to ACDT (UTC+10:30) in summer; the Northern Territory does not.
- •Adelaide and Darwin are 30 minutes apart during daylight saving, level in winter.
- •Adelaide is one of the few major cities on a 30-minute offset.
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.
Understanding the -4h 30m Gap: ACST vs Karachi
ACST runs on Australian Central Standard Time (ACST) at UTC+09:30. Karachi runs on Pakistan Standard Time (PKT) at UTC+05:00. That puts ACST 4 hours 30 minutes behind Karachi — a difference of -4h 30m at the current offsets.
In practice, when it is 9:00 AM in ACST it is 4:30 AM in Karachi. Midnight in ACST is 7:30 PM in Karachi. Neither zone observes daylight saving time, so the offset between them stays constant all year.
ACST to Karachi time conversion table
| ACST (ACST) | Karachi (PKT) | Day |
|---|---|---|
| 12:00 AM | 7:30 PM | previous day |
| 6:00 AM | 1:30 AM | same day |
| 7:00 AM | 2:30 AM | same day |
| 8:00 AM | 3:30 AM | same day |
| 9:00 AM | 4:30 AM | same day |
| 12:00 PM | 7:30 AM | same day |
| 3:00 PM | 10:30 AM | same day |
| 5:00 PM | 12:30 PM | same day |
| 6:00 PM | 1:30 PM | same day |
| 9:00 PM | 4:30 PM | same day |
Why people convert ACST to Karachi time
- Scheduling a call from ACST to Karachi: a 10:00 AM start in ACST lands at 5:30 AM in Karachi, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both ACST and Karachi are inside the 9-to-5 working day between 1:30 PM and 5:00 PM ACST time (9:00 AM–12:30 PM PKT). That is roughly 3 hours 30 minutes of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in ACST is 3:30 PM in Karachi makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM ACST" is unambiguous; "3 PM" across a -4h 30m gap is not.
- Block 1:30 PM–5:00 PM ACST as the recurring meeting window if you work primarily from ACST and need Karachi colleagues present.
About ACST (Australian Central Standard Time)
Australian Central Standard Time (ACST) is the half-hour offset of UTC+09:30 used across South Australia and the Northern Territory, taking in Adelaide and Darwin. South Australia moves to Australian Central Daylight Time (ACDT, UTC+10:30) from the first Sunday in October to the first Sunday in April, but the Northern Territory does not observe daylight saving — so Adelaide and Darwin sit 30 minutes apart in summer and level with each other in winter. The half-hour offset means Adelaide is 30 minutes behind Sydney in winter and level with it during daylight saving, which regularly catches out travellers and meeting planners.
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 ACST and Karachi
Both ACST and Karachi sit inside the 9 AM – 5 PM working day between 1:30 PM–5:00 PM ACST, which is 9:00 AM–12:30 PM PKT. That gives roughly 3 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
ACST and Karachi overlap for about 3 hours during the working day — enough for meetings if you avoid the edges of the window.
ACST is 4 hours 30 minutes behind Karachi (ACST UTC+09:30 → PKT UTC+05:00). The shared working window is 1:30 PM–5:00 PM ACST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
ACST
❄ Currently in Standard Time
Standard: UTC+09:30 · DST: UTC+10:30
Clocks spring forward on Sat, Oct 3, 2026
Karachi
Does not observe DST
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 ACST and Karachi?
ACST (ACST, UTC+09:30) is 4 hours 30 minutes behind Karachi (PKT, UTC+05:00). The gap is currently -4h 30m.
How do I convert ACST time to Karachi time?
Add -4h 30m to ACST local time. For example, 9:00 AM in ACST is 4:30 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 -4h 30m offset from ACST.
What is the best time to call Karachi from ACST?
Call between 1:30 PM and 5:00 PM ACST — that maps to 9:00 AM–12:30 PM PKT and keeps both parties inside the working day.
Which is behind, ACST or Karachi?
ACST is 4 hours 30 minutes behind Karachi. When it is 12:00 PM in ACST it is 7:30 AM in Karachi.
Do ACST and Karachi use different time zones?
ACST uses ACST at UTC+09:30, while Karachi (Pakistan) uses PKT at UTC+05:00. The IANA identifiers are Australia/Adelaide and Asia/Karachi.
Does daylight saving time affect the ACST–Karachi difference?
Neither zone observes daylight saving time, so the -4h 30m offset between ACST and Karachi is fixed all year.
Which other cities share ACST's time zone?
ACST also covers Adelaide, Darwin, Alice Springs, Mount Gambier.
Which countries use ACST, ACST's zone?
ACST is used in Australia (South Australia, Northern Territory).
Is there a day difference between ACST and Karachi?
Not normally. The -4h 30m gap only pushes the date over the previous day.
What is the time difference between ACST and Karachi?
Karachi is -4h 30m from ACST.
What timezone is ACST in?
ACST 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 ACST (Australian Central Standard Time)?
ACST is used in Australia (South Australia, Northern Territory).
Does ACST observe daylight saving time?
Yes, ACST switches to ACDT during summer months.
What are some interesting facts about ACST?
ACST uses a half-hour offset: UTC+09:30. South Australia moves to ACDT (UTC+10:30) in summer; the Northern Territory does not.
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 ACST, what time is it in Karachi?
When it is 12:00 AM (midnight) in ACST (ACST), it is -4h 30m later in Karachi (PKT).
Related Developer Tools
Explore more tools that work great with timezone conversions for international teams:
Related Timezone Conversions
More ACST time conversions
- acst to new york
- acst to london
- acst to dubai
- acst to tokyo
- acst to singapore
- acst to sydney
- acst to los angeles
- acst to paris
- acst to delhi
- acst to mumbai
- acst to berlin
- acst to hong kong
- acst to toronto
- acst to kathmandu
- new york to acst
- london to acst
- dubai to acst
- tokyo to acst
- singapore to acst
- sydney to acst
- los angeles to acst
- paris to acst
- delhi to acst
- mumbai to acst
- berlin to acst
- hong kong to acst
- toronto to acst
- kathmandu to acst
See every conversion from ACST →·See every conversion from Karachi →