Karachi to London
-4hKarachi
PKTSOURCELondon
BSTGreen rows indicate typical business hours (9 AM - 5 PM)
PKT and BST on the World Map
The map below highlights the PKT (Pakistan Standard Time) and BST (Greenwich Mean 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).
GMT – Greenwich Mean Time
UTC+00:00Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London. It is the same as UTC+00:00.
- •GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London.
- •The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
- •GMT and UTC are often used interchangeably, but UTC is based on atomic clocks.
- •Iceland uses GMT year-round and never observes daylight saving time.
- •The UK switches from GMT to BST (British Summer Time) in late March each year.
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.
About London
WikipediaLondon, where Greenwich Mean Time (GMT) originates, is the world's leading financial center alongside New York. The city bridges European and American business hours.
Big Ben is actually the name of the bell inside the Elizabeth Tower, not the tower itself.
Karachi to London Time Difference – Complete Guide
Karachi runs on Pakistan Standard Time (PKT) at UTC+05:00. London runs on British Summer Time (BST) at UTC+01:00, also currently on daylight saving time. That puts Karachi 4 hours behind London — a difference of -4h at the current offsets.
In practice, when it is 9:00 AM in Karachi it is 5:00 AM in London. Midnight in Karachi is 8:00 PM in London.London observes daylight saving time while Karachi does not, so the gap narrows or widens by an hour part of the year.
Karachi to London time conversion table
| Karachi (PKT) | London (BST) | Day |
|---|---|---|
| 12:00 AM | 8:00 PM | previous day |
| 6:00 AM | 2:00 AM | same day |
| 7:00 AM | 3:00 AM | same day |
| 8:00 AM | 4:00 AM | same day |
| 9:00 AM | 5:00 AM | same day |
| 12:00 PM | 8:00 AM | same day |
| 3:00 PM | 11:00 AM | same day |
| 5:00 PM | 1:00 PM | same day |
| 6:00 PM | 2:00 PM | same day |
| 9:00 PM | 5:00 PM | same day |
Why people convert Karachi to London time
- Scheduling a call from Karachi to London: a 10:00 AM start in Karachi lands at 6:00 AM in London, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Karachi and London are inside the 9-to-5 working day between 1:00 PM and 5:00 PM PKT time (9:00 AM–1:00 PM BST). That is roughly 4 hours of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in Karachi is 4:00 PM in London makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM PKT" is unambiguous; "3 PM" across a -4h gap is not.
- Block 1:00 PM–5:00 PM PKT as the recurring meeting window if you work primarily from Karachi and need London colleagues present.
- London: Clocks fall back on Sun, Oct 25, 2026. Any meeting series spanning that date will shift by an hour in local time.
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 GMT (Greenwich Mean Time)
Greenwich Mean Time (GMT) is the clock time at the Royal Observatory in Greenwich, London, which sits on the Prime Meridian (0° longitude). GMT serves as the reference point from which all other time zones are calculated. The United Kingdom uses GMT during winter months and switches to British Summer Time (BST, UTC+01:00) from late March to late October. Several West African nations use GMT year-round. GMT is often used interchangeably with UTC (Coordinated Universal Time), although technically they are different – UTC is based on atomic clocks while GMT is based on Earth's rotation.
Best time to call between Karachi and London
Both Karachi and London sit inside the 9 AM – 5 PM working day between 1:00 PM–5:00 PM PKT, which is 9:00 AM–1:00 PM BST. That gives roughly 4 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
Karachi and London overlap for about 4 hours during the working day — enough for meetings if you avoid the edges of the window.
Karachi is 4 hours behind London (PKT UTC+05:00 → BST UTC+01:00). The shared working window is 1:00 PM–5:00 PM PKT. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
Karachi
Does not observe DST
London
☀ Currently in DST
Standard: UTC+00:00 · DST: UTC+01:00
Clocks fall back on Sun, Oct 25, 2026
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 London?
Karachi (PKT, UTC+05:00) is 4 hours behind London (BST, UTC+01:00). The gap is currently -4h.
How do I convert Karachi time to London time?
Add -4h to Karachi local time. For example, 9:00 AM in Karachi is 5:00 AM in London.
What time is it in London right now?
London uses BST at UTC+01:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -4h offset from Karachi.
What is the best time to call London from Karachi?
Call between 1:00 PM and 5:00 PM PKT — that maps to 9:00 AM–1:00 PM BST and keeps both parties inside the working day.
Which is behind, Karachi or London?
Karachi is 4 hours behind London. When it is 12:00 PM in Karachi it is 8:00 AM in London.
Do Karachi and London use different time zones?
Karachi (Pakistan) uses PKT at UTC+05:00, while London (UK) uses BST at UTC+01:00. The IANA identifiers are Asia/Karachi and Europe/London.
Does daylight saving time affect the Karachi–London difference?
Yes at the moment: London is on daylight saving time and Karachi is not, so the -4h gap shifts by an hour when exactly one of them changes clocks.
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 London?
Not normally. The -4h gap only pushes the date over the previous day.
What is the time difference between Karachi and London?
London is -4h 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 London in?
London, where Greenwich Mean Time (GMT) originates, is the world's leading financial center alongside New York. The city bridges European and American business hours.
What are the business hours in Karachi?
Standard business hours in Karachi are 9:00 AM - 5:00 PM PKT.
What are the business hours in London?
Standard business hours in London are 9:00 AM - 5:00 PM GMT.
What is the best time to schedule a call between Karachi and London?
The best overlap for a call is when both cities are in business hours. Karachi works 9:00 AM - 5:00 PM PKT and London works 9:00 AM - 5:00 PM GMT (-4h difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Karachi and London?
Karachi uses PKR (₨) while London uses GBP (£). Check current exchange rates when planning travel or business between these cities.
How do Karachi and London compare in size?
Karachi has a population of approximately 14.9 million (metro: 16.5 million), while London has approximately 8.8 million (metro: 14.8 million).
What are the major landmarks in Karachi and London?
Karachi is known for Quaid-e-Azam's Mausoleum, Mohatta Palace, Clifton Beach. London is famous for Big Ben, Tower Bridge, Buckingham Palace.
Do Karachi and London have stock exchanges?
Yes. Karachi has the PSX (Pakistan Stock Exchange) and London has the LSE (London Stock Exchange). The -4h time difference affects trading hour overlaps between these exchanges.
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 GMT timezone?
Major cities in the GMT timezone include London, Dublin, Lisbon, Accra, Reykjavik, Edinburgh, Casablanca, Dakar.
What is the UTC offset for GMT?
Greenwich Mean Time (GMT) is at UTC+00:00. During daylight saving time, it shifts to BST.
What should I know about the GMT timezone?
GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London. The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
When is it midnight in Karachi, what time is it in London?
When it is 12:00 AM (midnight) in Karachi (PKT), it is -4h later in London (GMT).
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