Perth to London
-7hPerth
AWSTSOURCELondon
BSTGreen rows indicate typical business hours (9 AM - 5 PM)
AWST and BST on the World Map
The map below highlights the AWST (Australian Western Standard Time) and BST (Greenwich Mean Time) timezone regions across the globe.
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.
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 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.
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.
Perth to London Time Difference – Complete Guide
Perth runs on Australian Western Standard Time (AWST) at UTC+08:00. London runs on British Summer Time (BST) at UTC+01:00, also currently on daylight saving time. That puts Perth 7 hours behind London — a difference of -7h at the current offsets.
In practice, when it is 9:00 AM in Perth it is 2:00 AM in London. Midnight in Perth is 5:00 PM in London.London observes daylight saving time while Perth does not, so the gap narrows or widens by an hour part of the year.
Perth to London time conversion table
| Perth (AWST) | London (BST) | Day |
|---|---|---|
| 12:00 AM | 5:00 PM | previous day |
| 6:00 AM | 11:00 PM | previous day |
| 7:00 AM | 12:00 AM | same day |
| 8:00 AM | 1:00 AM | same day |
| 9:00 AM | 2:00 AM | same day |
| 12:00 PM | 5:00 AM | same day |
| 3:00 PM | 8:00 AM | same day |
| 5:00 PM | 10:00 AM | same day |
| 6:00 PM | 11:00 AM | same day |
| 9:00 PM | 2:00 PM | same day |
Why people convert Perth to London time
- Scheduling a call from Perth to London: a 10:00 AM start in Perth lands at 3:00 AM in London, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Perth and London are inside the 9-to-5 working day between 4:00 PM and 5:00 PM AWST time (9:00 AM–10:00 AM BST). That is roughly 1 hours of usable overlap.
- Booking travel or deliveries: tracking London local time against Perth keeps pickup windows and arrival estimates honest across the -7h offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM AWST" is unambiguous; "3 PM" across a -7h gap is not.
- Block 4:00 PM–5:00 PM AWST as the recurring meeting window if you work primarily from Perth 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 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.
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 Perth and London
Both Perth and London sit inside the 9 AM – 5 PM working day between 4:00 PM–5:00 PM AWST, which is 9:00 AM–10:00 AM BST. That gives roughly 1 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
Perth and London overlap for only 60 minutes (4:00 PM–5:00 PM AWST), so meetings have to be booked precisely.
Perth is 7 hours behind London (AWST UTC+08:00 → BST UTC+01:00). The shared working window is 4:00 PM–5:00 PM AWST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
Perth
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 Perth and London?
Perth (AWST, UTC+08:00) is 7 hours behind London (BST, UTC+01:00). The gap is currently -7h.
How do I convert Perth time to London time?
Add -7h to Perth local time. For example, 9:00 AM in Perth is 2:00 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 -7h offset from Perth.
What is the best time to call London from Perth?
Call between 4:00 PM and 5:00 PM AWST — that maps to 9:00 AM–10:00 AM BST and keeps both parties inside the working day.
Which is behind, Perth or London?
Perth is 7 hours behind London. When it is 12:00 PM in Perth it is 5:00 AM in London.
Do Perth and London use different time zones?
Perth (Australia) uses AWST at UTC+08:00, while London (UK) uses BST at UTC+01:00. The IANA identifiers are Australia/Perth and Europe/London.
Does daylight saving time affect the Perth–London 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 Perth's time zone?
AWST also covers Perth, Mandurah, Bunbury, Geraldton.
Which countries use AWST, Perth's zone?
AWST is used in Australia (Western Australia).
Is there a day difference between Perth and London?
Not normally. The -7h gap only pushes the date over the previous day.
What is the time difference between Perth and London?
London is -7h from Perth.
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 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 Perth?
Standard business hours in Perth are 9:00 AM - 5:00 PM AWST.
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 Perth and London?
The best overlap for a call is when both cities are in business hours. Perth works 9:00 AM - 5:00 PM AWST and London works 9:00 AM - 5:00 PM GMT (-7h difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Perth and London?
Perth uses AUD (A$) while London uses GBP (£). Check current exchange rates when planning travel or business between these cities.
How do Perth and London compare in size?
Perth has a population of approximately 2.1 million (metro: 2.2 million), while London has approximately 8.8 million (metro: 14.8 million).
What are the major landmarks in Perth and London?
Perth is known for Kings Park, Perth Mint, Elizabeth Quay. London is famous for Big Ben, Tower Bridge, Buckingham Palace.
Do Perth and London have stock exchanges?
Yes. Perth has the ASX (via Sydney) and London has the LSE (London Stock Exchange). The -7h time difference affects trading hour overlaps between these exchanges.
Which countries use AWST (Australian Western Standard Time)?
AWST is used in Australia (Western Australia).
Does AWST observe daylight saving time?
No, AWST does not observe daylight saving time and remains at UTC+08:00 year-round.
What are some interesting facts about AWST?
Western Australia does not observe daylight saving time. Perth is the most isolated major city in the world.
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 Perth, what time is it in London?
When it is 12:00 AM (midnight) in Perth (AWST), it is -7h later in London (GMT).
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