BST to AWST Converter
Convert time between British Summer Time (BST) and Australian Western Standard Time (AWST)
British Summer Time (BST)
Australian Western Standard Time (AWST)
Time Difference
Australian Western Standard Time (AWST) is 0 hours ahead of British Summer Time (BST)
Select Date
Select Time
Quick Reference
| BST | AWST |
|---|---|
| 03:00 | 10:00 |
| 05:00 | 12:00 |
| 07:00 | 14:00 |
| 09:00 | 16:00 |
| 11:00 | 18:00 |
| 13:00 | 20:00 |
| 15:00 | 22:00 |
| 17:00 | 00:00 |
| 19:00 | 02:00 |
| 21:00 | 04:00 |
| 23:00 | 06:00 |
| 01:00 | 08:00 |
Top 10 Most Common Time Zones
| Abbreviation | Full Name | UTC Offset | Typical Use |
|---|---|---|---|
| UTC | Coordinated Universal Time | UTC ±0 | Global reference standard (servers, logs, APIs) |
| EST / EDT | Eastern (US) Time | UTC −5 / −4 | New York, Toronto — North American business hub |
| CST / CDT | Central (US) Time | UTC −6 / −5 | Chicago, Dallas — US central business region |
| PST / PDT | Pacific (US) Time | UTC −8 / −7 | San Francisco, Los Angeles — tech industry standard |
| GMT / BST | Greenwich Mean / British Summer Time | UTC 0 / +1 | UK, used globally as a reference with UTC |
| CET / CEST | Central European (Summer) Time | UTC +1 / +2 | Paris, Berlin, Amsterdam — EU business core |
| IST | India Standard Time | UTC +5:30 | India — major IT & outsourcing region |
| CST | China Standard Time | UTC +8 | Beijing, Shanghai — East Asia business hub |
| JST | Japan Standard Time | UTC +9 | Tokyo — finance & tech hub |
| AEST / AEDT | Australian Eastern (Daylight) Time | UTC +10 / +11 | Sydney, Melbourne — APAC regional business |
Why Time Zone Abbreviations Are Ambiguous
Unlike standardized identifiers (like America/New_York or Europe/London from the IANA tz database), abbreviations such as "CST" or "IST" are not globally unique. They can refer to different time zones depending on context — country, region, or even time of year (due to daylight saving time).
Common Ambiguous Time Zone Abbreviations
| Abbrev. | Common Meaning(s) | UTC Offset | Region(s) |
|---|---|---|---|
| CST | Central Standard Time / China Standard Time / Cuba Standard Time | UTC−6 / UTC+8 / UTC−5 | North America, China, Cuba |
| IST | Indian Standard Time / Irish Standard Time / Israel Standard Time | UTC+5:30 / UTC+1 / UTC+2 | India, Ireland, Israel |
| AST | Atlantic Standard Time / Arabia Standard Time | UTC−4 / UTC+3 | Caribbean, Canada, Middle East |
| PST | Pacific Standard Time / Philippine Standard Time | UTC−8 / UTC+8 | North America, Philippines |
| EST | Eastern Standard Time (North America / Australia) | UTC−5 / UTC+10 | North America, Australia |
✅ Best Practice
To avoid ambiguity, always:
- Use IANA tz identifiers — e.g.,
America/New_Yorkinstead of "EST" - Specify UTC offset explicitly — e.g.,
UTC−5when abbreviations must be used - Include the full timezone name — e.g., "Eastern Standard Time (EST)" with UTC offset
About BST to AWST Time Conversion
Converting time between British Summer Time (BST) and Australian Western Standard Time (AWST) is essential during British summer months (late March to late October). BST is UTC+1 while AWST is UTC+8, making AWST 7 hours ahead of BST. Western Australia does not observe daylight saving time, so AWST stays at UTC+8 year-round. When the UK reverts to GMT (UTC+0), the difference increases to 8 hours, so seasonal awareness is important for scheduling.
This conversion is vital for UK businesses and individuals working with partners, clients, or family in Perth and the wider Western Australia region. Whether coordinating corporate meetings, managing distributed teams, or planning personal calls, our IANA-based converter provides accurate calculations that account for the UK's daylight saving transitions.
Common Use Cases for BST to AWST Conversion
Business & Work
- Scheduling meetings between UK offices and Perth-based teams or clients
- Coordinating deadlines and deliverables across UK and Western Australian operations
- Planning conference calls and webinars for UK-Perth business audiences
Personal & Travel
- Planning travel from the UK to Perth or Western Australia
- Coordinating calls with family and friends living in Perth
- Scheduling virtual events and online activities across the UK and Western Australia
Time Zone Information
British Summer Time (BST)
- UTC Offset: UTC+1
- IANA Timezone: Europe/London
- Daylight Saving: Yes - BST is daylight saving time (late March to late October)
- Major Cities: London, Manchester, Birmingham, Leeds, Edinburgh
- Coverage: United Kingdom and Ireland (during summer)
Australian Western Standard Time (AWST)
- UTC Offset: UTC+8
- IANA Timezone: Australia/Perth
- Daylight Saving: None - AWST does not observe daylight saving time
- Major Cities: Perth, Fremantle, Bunbury, Geraldton, Kalgoorlie
- Coverage: Western Australia
Quick Reference: BST to AWST
Remember: AWST is always 7 hours ahead of BST during British summer. When the UK switches to GMT, the difference becomes 8 hours.
Frequently Asked Questions
What is the time difference between BST and AWST?
British Summer Time (BST) is UTC+1, while Australian Western Standard Time (AWST) is UTC+8. AWST is 7 hours ahead of BST. For example, when it's 9:00 AM in London (BST), it's 4:00 PM in Perth (AWST).
When does BST apply and how does it affect the AWST difference?
BST applies in the UK from the last Sunday in March to the last Sunday in October. During BST (UTC+1), AWST is 7 hours ahead. Outside this period, the UK uses GMT (UTC+0), making AWST 8 hours ahead. Western Australia does not observe daylight saving time, so AWST remains constant at UTC+8 year-round.
How does the time difference change throughout the year?
The difference shifts twice a year. During British summer (late March to late October), AWST is 7 hours ahead of BST. During British winter (late October to late March), AWST is 8 hours ahead of GMT. Western Australia does not change its clocks, so all transitions are driven by the UK.
What are the best times for BST-AWST business calls?
The overlap between UK business hours (9 AM–5 PM BST) and Perth business hours (9 AM–5 PM AWST) is minimal. The best window is early morning UK time: 9:00 AM–10:00 AM BST corresponds to 4:00 PM–5:00 PM AWST, which is the end of the Perth business day. Alternatively, late afternoon Perth calls (3–5 PM AWST) fall at 8–10 AM BST, just before or at the UK start of day.
Which countries or regions use AWST?
AWST (UTC+8) is used exclusively by Western Australia, which is the largest Australian state by area. Major cities include Perth, Fremantle, Bunbury, Geraldton, and Kalgoorlie. Western Australia does not observe daylight saving time, unlike some other Australian states.
Which countries or regions use BST?
BST (British Summer Time, UTC+1) is observed in the United Kingdom and Ireland during summer months, from the last Sunday in March to the last Sunday in October. Major cities include London, Manchester, Birmingham, Leeds, Edinburgh, Dublin, and Cardiff. Outside this period, the UK and Ireland use GMT (UTC+0).
Pro Tips
- • AWST is 7 hours ahead of BST — add 7 hours to UK time to get Perth time during British summer.
- • Western Australia never changes its clocks, so all seasonal shifts in the BST-AWST difference come from the UK side only.
- • The best overlap for UK-Perth calls is 9–10 AM BST (4–5 PM AWST), catching Perth just before close of business.
- • During British winter (GMT), AWST is 8 hours ahead — remember to adjust your calculations between October and March.
- • Perth operates in a unique time zone that sets it apart from the rest of Australia; it shares UTC+8 with China, Singapore, and the Philippines.
- • For recurring UK-Perth meetings, consider a standing 9 AM BST / 4 PM AWST slot to ensure both sides are within working hours.