London to Perth
+8hLondon
GMTSOURCEPerth
AWSTGreen rows indicate typical business hours (9 AM - 5 PM)
GMT and AWST on the World Map
The map below highlights the GMT (Greenwich Mean Time) and AWST (Australian Western 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.
AWST – Australian Western Standard Time
UTC+08:00Australian Western Standard Time (AWST) is the time zone for Western Australia, 8 hours ahead of UTC.
- •Western Australia does not observe daylight saving time.
- •Perth is the most isolated major city in the world.
- •AWST is the same offset as China Standard Time and Singapore Time.
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 Perth
WikipediaPerth operates on Australian Western Time (AWST), UTC+8 with no daylight saving. As Australia's mining capital, Perth coordinates with Asian markets.
Western Australia does not observe daylight saving time.
Comparing Time Zones: London and Perth
London, UK operates on the Greenwich Mean Time (UTC+00:00). Perth, Australia uses Australian Western Standard Time (UTC+08:00).
The time difference between London and Perth is 480 minutes (+8h). When it's noon in London, it's 08:00 PM in Perth.
Why Convert London to Perth Time?
Navigating the time gap between London and Perth requires careful planning. With a difference of 8 hours, finding a suitable time for both locations is essential for effective collaboration. This tool simplifies the process, allowing you to instantly see the corresponding time in Perth.
Pro Tip: If you frequently communicate with people in Perth from London, consider adding a dual-clock widget to your phone or computer to keep track of the 8-hour difference at a glance.
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 AWST (Australian Western Standard Time)
Australian Western Standard Time (AWST) is used in Western Australia. WA does not observe daylight saving time, having rejected it in multiple referendums. Perth is the most remote major city in the world.
Best Time to Call Between London and Perth
If you want to reach someone in Perth during standard business hours (9 AM – 5 PM AWST), the best time to call from London would be:
- Perth 9:00 AM = London 01:00 AM
- Perth 12:00 PM = London 04:00 AM
- Perth 5:00 PM = London 09:00 AM
Business Hours Overlap
London and Perth have a partial business hours overlap. The best window for meetings and calls is when both locations are in their working hours.
To wrap up, keeping track of the +8h gap between London and Perth is essential for seamless communication. Bookmark this converter to stay on top of your schedule.
🕐 Daylight Saving Time Info
London
❄ Currently in Standard Time
Standard: UTC+00:00 · DST: UTC+01:00
Clocks spring forward on Sun, Mar 29, 2026
Perth
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 Perth?
Perth is +8h 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 Perth in?
Perth operates on Australian Western Time (AWST), UTC+8 with no daylight saving. As Australia's mining capital, Perth coordinates with Asian markets.
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 Perth?
Standard business hours in Perth are 9:00 AM - 5:00 PM AWST.
What is the best time to schedule a call between London and Perth?
The best overlap for a call is when both cities are in business hours. London works 9:00 AM - 5:00 PM GMT and Perth works 9:00 AM - 5:00 PM AWST (+8h difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in London and Perth?
London uses GBP (£) while Perth uses AUD (A$). Check current exchange rates when planning travel or business between these cities.
How do London and Perth compare in size?
London has a population of approximately 8.8 million (metro: 14.8 million), while Perth has approximately 2.1 million (metro: 2.2 million).
What are the major landmarks in London and Perth?
London is known for Big Ben, Tower Bridge, Buckingham Palace. Perth is famous for Kings Park, Perth Mint, Elizabeth Quay.
Do London and Perth have stock exchanges?
Yes. London has the LSE (London Stock Exchange) and Perth has the ASX (via Sydney). The +8h 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 AWST timezone?
Major cities in the AWST timezone include Perth, Mandurah, Bunbury, Geraldton.
What is the UTC offset for AWST?
Australian Western Standard Time (AWST) is at UTC+08:00.
What should I know about the AWST timezone?
Western Australia does not observe daylight saving time. Perth is the most isolated major city in the world.
When is it midnight in London, what time is it in Perth?
When it is 12:00 AM (midnight) in London (GMT), it is +8h later in Perth (AWST).
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