London to Karachi
+4hLondon
BSTSOURCEKarachi
PKTGreen rows indicate typical business hours (9 AM - 5 PM)
BST and PKT on the World Map
The map below highlights the BST (Greenwich Mean Time) and PKT (Pakistan Standard Time) timezone regions across the globe.
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.
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 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.
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 London and Karachi Time
London runs on British Summer Time (BST) at UTC+01:00, currently observing daylight saving time. Karachi runs on Pakistan Standard Time (PKT) at UTC+05:00. That puts London 4 hours ahead of Karachi — a difference of +4h at the current offsets.
In practice, when it is 9:00 AM in London it is 1:00 PM in Karachi. Midnight in London is 4:00 AM in Karachi.London observes daylight saving time while Karachi does not, so the gap narrows or widens by an hour part of the year.
London to Karachi time conversion table
| London (BST) | Karachi (PKT) | Day |
|---|---|---|
| 12:00 AM | 4:00 AM | same day |
| 6:00 AM | 10:00 AM | same day |
| 7:00 AM | 11:00 AM | same day |
| 8:00 AM | 12:00 PM | same day |
| 9:00 AM | 1:00 PM | same day |
| 12:00 PM | 4:00 PM | same day |
| 3:00 PM | 7:00 PM | same day |
| 5:00 PM | 9:00 PM | same day |
| 6:00 PM | 10:00 PM | same day |
| 9:00 PM | 1:00 AM | next day |
Why people convert London to Karachi time
- Scheduling a call from London to Karachi: a 10:00 AM start in London lands at 2:00 PM in Karachi, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both London and Karachi are inside the 9-to-5 working day between 9:00 AM and 1:00 PM BST time (1:00 PM–5:00 PM PKT). That is roughly 4 hours of usable overlap.
- Watching a live event or market open: London viewers need 1:00 PM in Karachi to catch a 9:00 AM start there, and 8:00 PM if the event is anchored to London.
- Always state the zone abbreviation, not just the hour. "3:00 PM BST" is unambiguous; "3 PM" across a +4h gap is not.
- Block 9:00 AM–1:00 PM BST as the recurring meeting window if you work primarily from London and need Karachi colleagues present.
- London: Clocks fall back on Sun, Oct 25, 2026. Re-check this page after that date because the offset changes and so does the +4h gap.
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.
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 London and Karachi
Both London and Karachi sit inside the 9 AM – 5 PM working day between 9:00 AM–1:00 PM BST, which is 1:00 PM–5:00 PM PKT. That gives roughly 4 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
London and Karachi overlap for about 4 hours during the working day — enough for meetings if you avoid the edges of the window.
London is 4 hours ahead of Karachi (BST UTC+01:00 → PKT UTC+05:00). The shared working window is 9:00 AM–1:00 PM BST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
London
☀ Currently in DST
Standard: UTC+00:00 · DST: UTC+01:00
Clocks fall back on Sun, Oct 25, 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 London and Karachi?
London (BST, UTC+01:00) is 4 hours ahead of Karachi (PKT, UTC+05:00). The gap is currently +4h.
How do I convert London time to Karachi time?
Add +4h to London local time. For example, 9:00 AM in London is 1:00 PM 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 offset from London.
What is the best time to call Karachi from London?
Call between 9:00 AM and 1:00 PM BST — that maps to 1:00 PM–5:00 PM PKT and keeps both parties inside the working day.
Which is ahead, London or Karachi?
London is 4 hours ahead of Karachi. When it is 12:00 PM in London it is 4:00 PM in Karachi.
Do London and Karachi use different time zones?
London (UK) uses BST at UTC+01:00, while Karachi (Pakistan) uses PKT at UTC+05:00. The IANA identifiers are Europe/London and Asia/Karachi.
Does daylight saving time affect the London–Karachi 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 London's time zone?
BST also covers London, Dublin, Lisbon, Accra, Reykjavik, Edinburgh, Casablanca, Dakar and 5 more.
Which countries use BST, London's zone?
BST is used in United Kingdom, Ireland, Iceland, Portugal (mainland), Ghana, Senegal, Mali, Mauritania and 7 more.
Is there a day difference between London and Karachi?
Not normally. The +4h gap only pushes the date over for late-evening times.
What is the time difference between London and Karachi?
Karachi is +4h from London.
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 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 London?
Standard business hours in London are 9:00 AM - 5:00 PM GMT.
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 London and Karachi?
The best overlap for a call is when both cities are in business hours. London works 9:00 AM - 5:00 PM GMT and Karachi works 9:00 AM - 5:00 PM PKT (+4h difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in London and Karachi?
London uses GBP (£) while Karachi uses PKR (₨). Check current exchange rates when planning travel or business between these cities.
How do London and Karachi compare in size?
London has a population of approximately 8.8 million (metro: 14.8 million), while Karachi has approximately 14.9 million (metro: 16.5 million).
What are the major landmarks in London and Karachi?
London is known for Big Ben, Tower Bridge, Buckingham Palace. Karachi is famous for Quaid-e-Azam's Mausoleum, Mohatta Palace, Clifton Beach.
Do London and Karachi have stock exchanges?
Yes. London has the LSE (London Stock Exchange) and Karachi has the PSX (Pakistan Stock Exchange). The +4h time difference affects trading hour overlaps between these exchanges.
Which countries use GMT (Greenwich Mean Time)?
GMT is used in United Kingdom, Ireland, Iceland, Portugal (mainland), Ghana, Senegal, and 9 more countries.
Does GMT observe daylight saving time?
Yes, GMT switches to BST during summer months.
What are some interesting facts about GMT?
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.
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 London, what time is it in Karachi?
When it is 12:00 AM (midnight) in London (GMT), it is +4h later in Karachi (PKT).
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