London to Perth
+7hLondon
BSTSOURCEPerth
AWSTGreen rows indicate typical business hours (9 AM - 5 PM)
BST and AWST on the World Map
The map below highlights the BST (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.
London to Perth Time Difference – Complete Guide
London runs on British Summer Time (BST) at UTC+01:00, currently observing daylight saving time. Perth runs on Australian Western Standard Time (AWST) at UTC+08:00. That puts London 7 hours ahead of Perth — a difference of +7h at the current offsets.
In practice, when it is 9:00 AM in London it is 4:00 PM in Perth. Midnight in London is 7:00 AM in Perth.London observes daylight saving time while Perth does not, so the gap narrows or widens by an hour part of the year.
London to Perth time conversion table
| London (BST) | Perth (AWST) | Day |
|---|---|---|
| 12:00 AM | 7:00 AM | same day |
| 6:00 AM | 1:00 PM | same day |
| 7:00 AM | 2:00 PM | same day |
| 8:00 AM | 3:00 PM | same day |
| 9:00 AM | 4:00 PM | same day |
| 12:00 PM | 7:00 PM | same day |
| 3:00 PM | 10:00 PM | same day |
| 5:00 PM | 12:00 AM | next day |
| 6:00 PM | 1:00 AM | next day |
| 9:00 PM | 4:00 AM | next day |
Why people convert London to Perth time
- Scheduling a call from London to Perth: a 10:00 AM start in London lands at 5:00 PM in Perth, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both London and Perth are inside the 9-to-5 working day between 9:00 AM and 10:00 AM BST time (4:00 PM–5:00 PM AWST). That is roughly 1 hours of usable overlap.
- Coordinating a London-based team with Perth contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.
- Always state the zone abbreviation, not just the hour. "3:00 PM BST" is unambiguous; "3 PM" across a +7h gap is not.
- Block 9:00 AM–10:00 AM BST as the recurring meeting window if you work primarily from London and need Perth 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 +7h 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 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
Both London and Perth sit inside the 9 AM – 5 PM working day between 9:00 AM–10:00 AM BST, which is 4:00 PM–5:00 PM AWST. That gives roughly 1 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
London and Perth overlap for only 60 minutes (9:00 AM–10:00 AM BST), so meetings have to be booked precisely.
London is 7 hours ahead of Perth (BST UTC+01:00 → AWST UTC+08:00). The shared working window is 9:00 AM–10:00 AM 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
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?
London (BST, UTC+01:00) is 7 hours ahead of Perth (AWST, UTC+08:00). The gap is currently +7h.
How do I convert London time to Perth time?
Add +7h to London local time. For example, 9:00 AM in London is 4:00 PM in Perth.
What time is it in Perth right now?
Perth uses AWST at UTC+08:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +7h offset from London.
What is the best time to call Perth from London?
Call between 9:00 AM and 10:00 AM BST — that maps to 4:00 PM–5:00 PM AWST and keeps both parties inside the working day.
Which is ahead, London or Perth?
London is 7 hours ahead of Perth. When it is 12:00 PM in London it is 7:00 PM in Perth.
Do London and Perth use different time zones?
London (UK) uses BST at UTC+01:00, while Perth (Australia) uses AWST at UTC+08:00. The IANA identifiers are Europe/London and Australia/Perth.
Does daylight saving time affect the London–Perth difference?
Yes at the moment: London is on daylight saving time and Perth is not, so the +7h 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 Perth?
Not normally. The +7h gap only pushes the date over for late-evening times.
What is the time difference between London and Perth?
Perth is +7h 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 (+7h 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 +7h 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 +7h later in Perth (AWST).
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