Colombo to Karachi
-0h 30mColombo
ISTSOURCEKarachi
PKTGreen rows indicate typical business hours (9 AM - 5 PM)
IST and PKT on the World Map
The map below highlights the IST (India Standard Time) and PKT (Pakistan Standard Time) timezone regions across the globe.
IST – India Standard Time
UTC+05:30India Standard Time (IST) is the time zone for India and Sri Lanka, 5 hours and 30 minutes ahead of UTC.
- •India is 10 hours 30 minutes ahead of EST and 5 hours 30 minutes ahead of GMT.
- •India uses a single time zone despite spanning 30° of longitude.
- •IST is one of only a handful of time zones with a 30-minute offset.
- •IST is the most populous single time zone in the world with over 1.4 billion people.
- •The Bombay Stock Exchange (BSE) and National Stock Exchange (NSE) operate on IST.
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 Colombo
WikipediaColombo operates on Sri Lanka Time (SLST), UTC+5:30. Sharing India's timezone, Colombo is a key South Asian trade and tourism hub.
Sri Lanka Standard Time (SLST) uses UTC+5:30, same offset as India.
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.
Time Conversion Guide: Colombo to Karachi
Colombo runs on India Standard Time (IST) at UTC+05:30. Karachi runs on Pakistan Standard Time (PKT) at UTC+05:00. That puts Colombo 30 minutes behind Karachi — a difference of -0h 30m at the current offsets.
In practice, when it is 9:00 AM in Colombo it is 8:30 AM in Karachi. Midnight in Colombo is 11:30 PM in Karachi. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Colombo to Karachi time conversion table
| Colombo (IST) | Karachi (PKT) | Day |
|---|---|---|
| 12:00 AM | 11:30 PM | previous day |
| 6:00 AM | 5:30 AM | same day |
| 7:00 AM | 6:30 AM | same day |
| 8:00 AM | 7:30 AM | same day |
| 9:00 AM | 8:30 AM | same day |
| 12:00 PM | 11:30 AM | same day |
| 3:00 PM | 2:30 PM | same day |
| 5:00 PM | 4:30 PM | same day |
| 6:00 PM | 5:30 PM | same day |
| 9:00 PM | 8:30 PM | same day |
Why people convert Colombo to Karachi time
- Scheduling a call from Colombo to Karachi: a 10:00 AM start in Colombo lands at 9:30 AM in Karachi, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Colombo and Karachi are inside the 9-to-5 working day between 9:30 AM and 5:00 PM IST time (9:00 AM–4:30 PM PKT). That is roughly 7 hours 30 minutes of usable overlap.
- Booking travel or deliveries: tracking Karachi local time against Colombo keeps pickup windows and arrival estimates honest across the -0h 30m offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM IST" is unambiguous; "3 PM" across a -0h 30m gap is not.
- Block 9:30 AM–5:00 PM IST as the recurring meeting window if you work primarily from Colombo and need Karachi colleagues present.
About IST (India Standard Time)
India Standard Time (IST) is the time observed throughout India and Sri Lanka. It is based on the 82.5°E meridian, passing through Mirzapur in Uttar Pradesh. India uses a single time zone despite spanning roughly 30° of longitude, which has been debated. IST does not observe daylight saving time. India is the world's most populous country, making IST one of the most-used time zones globally. The IT outsourcing industry and call centers operate primarily on IST, making the EST-to-IST conversion one of the most searched timezone conversions.
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 Colombo and Karachi
Both Colombo and Karachi sit inside the 9 AM – 5 PM working day between 9:30 AM–5:00 PM IST, which is 9:00 AM–4:30 PM PKT. That gives roughly 7 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
Colombo and Karachi share 7 hours of working-hours overlap (9:30 AM–5:00 PM IST), so scheduling a live meeting is straightforward.
Colombo is 30 minutes behind Karachi (IST UTC+05:30 → PKT UTC+05:00). The shared working window is 9:30 AM–5:00 PM IST. 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 Colombo and Karachi?
Colombo (IST, UTC+05:30) is 30 minutes behind Karachi (PKT, UTC+05:00). The gap is currently -0h 30m.
How do I convert Colombo time to Karachi time?
Add -0h 30m to Colombo local time. For example, 9:00 AM in Colombo is 8:30 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 -0h 30m offset from Colombo.
What is the best time to call Karachi from Colombo?
Call between 9:30 AM and 5:00 PM IST — that maps to 9:00 AM–4:30 PM PKT and keeps both parties inside the working day.
Which is behind, Colombo or Karachi?
Colombo is 30 minutes behind Karachi. When it is 12:00 PM in Colombo it is 11:30 AM in Karachi.
Do Colombo and Karachi use different time zones?
Colombo (Sri Lanka) uses IST at UTC+05:30, while Karachi (Pakistan) uses PKT at UTC+05:00. The IANA identifiers are Asia/Colombo and Asia/Karachi.
Does daylight saving time affect the Colombo–Karachi difference?
Neither zone observes daylight saving time, so the -0h 30m offset between Colombo and Karachi is fixed all year.
Which other cities share Colombo's time zone?
IST also covers Mumbai, Delhi, Bangalore, Kolkata, Chennai, Hyderabad, Pune, Ahmedabad and 4 more.
Which countries use IST, Colombo's zone?
IST is used in India, Sri Lanka.
Is there a day difference between Colombo and Karachi?
Not normally. The -0h 30m gap only pushes the date over the previous day.
What is the time difference between Colombo and Karachi?
Karachi is -0h 30m from Colombo.
What timezone is Colombo in?
Colombo operates on Sri Lanka Time (SLST), UTC+5:30. Sharing India's timezone, Colombo is a key South Asian trade and tourism hub.
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 Colombo?
Standard business hours in Colombo are 9:00 AM - 5:00 PM IST.
What are the business hours in Karachi?
Standard business hours in Karachi are 9:00 AM - 5:00 PM PKT.
What is the best time to schedule a call between Colombo and Karachi?
The best overlap for a call is when both cities are in business hours. Colombo works 9:00 AM - 5:00 PM IST and Karachi works 9:00 AM - 5:00 PM PKT (-0h 30m difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Colombo and Karachi?
Colombo uses LKR (Rs) while Karachi uses PKR (₨). Check current exchange rates when planning travel or business between these cities.
How do Colombo and Karachi compare in size?
Colombo has a population of approximately 752,000 (metro: 5.6 million), while Karachi has approximately 14.9 million (metro: 16.5 million).
What are the major landmarks in Colombo and Karachi?
Colombo is known for Galle Face Green, Gangaramaya Temple, Colombo Lotus Tower. Karachi is famous for Quaid-e-Azam's Mausoleum, Mohatta Palace, Clifton Beach.
Do Colombo and Karachi have stock exchanges?
Yes. Colombo has the CSE (Colombo Stock Exchange) and Karachi has the PSX (Pakistan Stock Exchange). The -0h 30m time difference affects trading hour overlaps between these exchanges.
Which countries use IST (India Standard Time)?
IST is used in India, Sri Lanka.
Does IST observe daylight saving time?
No, IST does not observe daylight saving time and remains at UTC+05:30 year-round.
What are some interesting facts about IST?
India is 10 hours 30 minutes ahead of EST and 5 hours 30 minutes ahead of GMT. India uses a single time zone despite spanning 30° of longitude.
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 Colombo, what time is it in Karachi?
When it is 12:00 AM (midnight) in Colombo (IST), it is -0h 30m later in Karachi (PKT).
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