Compare BST vs AEST
See the current BST to AEST time difference, how daylight saving affects the gap, and the best hours to schedule calls.
How to Find the Time Difference Between BST and AEST
Open the BST vs AEST converter page: Go to https://www.xconvert.com/time-converter/bst-vs-aest to load a visual comparison between British Summer Time (BST, UTC+1) and Australian Eastern Standard Time (AEST, UTC+10). This page is useful when you are scheduling a call between London and Brisbane, coordinating a media handoff between a UK team and an operations team in eastern Australia, or checking whether a support shift overlaps with Australian business hours.
Add relevant comparison cities with the + Add City button: Click + Add City and add cities such as London, Brisbane, and Sydney to compare practical working-hour overlap across UK and Australian markets. This is especially helpful for industries like finance, education, SaaS support, and logistics, where UK-based teams often need to coordinate with Queensland offices on AEST and also verify whether New South Wales offices may be on daylight time later in the year.
Drag on the grid to select a meeting window: Click Select if needed, then drag across the BST row from 9:00 AM to 11:00 AM BST to highlight that range in purple; the AEST row will show the equivalent as 6:00 PM to 8:00 PM AEST on the same day because AEST is 9 hours ahead of BST. This makes it easy to confirm that a late UK morning meeting fits into an Australian early-evening slot, which is often workable for project reviews, client updates, or end-of-day handoffs.
Export the selected time for your team: After selecting the range, use the export options for ICS download, Google Calendar, Gmail, Copy to clipboard, or Share link. For example, a UK account manager can send the Google Calendar event to a Brisbane client, attach the ICS file for Outlook users, or use Copy to clipboard to paste the exact BST-to-AEST window into Slack so both sides see the meeting in local time.
BST vs AEST Offset Explained
BST is UTC+1 and AEST is UTC+10, so AEST is exactly 9 hours ahead of BST. That means when it is 9:00 AM in BST, it is 6:00 PM in AEST the same day, and when it is 3:00 PM in BST, it is midnight in AEST at the start of the next calendar day. This large eastward gap usually creates the best overlap in the UK morning and early Australian evening, which is why many distributed teams schedule meetings around 8:00 AM to 11:00 AM BST.
BST itself is a daylight saving time used in the United Kingdom during the warmer half of the year, while AEST is a standard time used year-round in parts of eastern Australia such as Queensland. BST begins when the UK moves clocks forward on the last Sunday in March and ends on the last Sunday in October; in 2025, BST runs from 30 March 2025 to 26 October 2025. During that period, London and other UK locations are on UTC+1, while Brisbane remains on AEST (UTC+10) with no daylight saving change, keeping the BST–AEST difference at 9 hours.
The exact difference changes outside the BST season because the UK returns to Greenwich Mean Time (GMT, UTC+0). When the UK is on GMT instead of BST, AEST is 10 hours ahead, so 9:00 AM GMT = 7:00 PM AEST. This matters for recurring meetings that continue through October and November, because a call that worked at 10:00 AM BST / 7:00 PM AEST will shift to 10:00 AM GMT / 8:00 PM AEST unless the organizer adjusts the schedule.
AEST should also be distinguished from Australian Eastern Daylight Time (AEDT), which is used by Sydney, Melbourne, Canberra, and Hobart during Australian daylight saving. Queensland, including Brisbane with a population of roughly 2.5 million in the greater metropolitan area, stays on AEST all year, while Sydney and Melbourne move to AEDT (UTC+11) from the first Sunday in October to the first Sunday in April; in 2025, Australian daylight saving ends on 6 April 2025 and starts again on 5 October 2025. As a result, if you are really coordinating with Sydney rather than Brisbane, the gap versus BST may be 10 hours instead of 9 during part of the year.
In practical business terms, BST vs AEST is commonly used for UK–Queensland coordination in sectors such as mining services, higher education, tourism, aviation, and software support. London is a global finance and legal hub with a metro population near 9 million, while Brisbane is a major gateway for Queensland’s infrastructure, resources, and Asia-Pacific trade. Because direct overlap is limited, teams often use BST mornings for live calls and leave asynchronous work, email approvals, or ticket handoffs for the rest of the day.
Frequently Asked Questions
What is the exact time difference between BST and AEST?
AEST is 9 hours ahead of BST. For example, 8:00 AM BST is 5:00 PM AEST, and 12:00 noon BST is 9:00 PM AEST, which means UK lunchtime is already late evening in eastern Australia on AEST.
Why does BST to AEST sometimes seem different at other times of the year?
The difference changes because BST is seasonal, while AEST is a fixed standard time. During the UK summer, BST is UTC+1 and the gap to AEST is 9 hours, but when the UK switches back to GMT (UTC+0) after the last Sunday in October, the gap becomes 10 hours.
Is Sydney on AEST all year like Brisbane?
No, Sydney is not on AEST all year. Sydney uses AEST (UTC+10) in winter and AEDT (UTC+11) during Australian daylight saving, so if your counterpart is in Sydney rather than Brisbane, your BST comparison may be different by an extra hour during the Australian summer period.
What are the best meeting hours between BST and AEST?
The best overlap is usually 8:00 AM to 11:00 AM BST, which corresponds to 5:00 PM to 8:00 PM AEST. This window works for UK teams before lunch and for Brisbane-based teams near the end of the business day, making it a common choice for weekly client calls, deployment reviews, and executive check-ins.
How do I convert 9 AM BST to AEST?
To convert 9:00 AM BST to AEST, add 9 hours, which gives 6:00 PM AEST on the same day. This is a useful benchmark for recurring meetings because a standard UK morning slot lands in Australia’s early evening, often after normal office hours but still feasible for scheduled calls.
Does BST mean the same thing as UK time all year?
No, BST is only the UK’s summer daylight saving time. In winter, the UK uses GMT, so if you are booking travel, webinars, or support coverage for dates in November through March, you should not assume the BST-to-AEST difference still applies.
How does daylight saving in Australia affect BST vs AEST planning?
For AEST specifically, there is no daylight saving change in places like Brisbane, Queensland, so the BST-to-AEST relationship stays straightforward during the UK summer. However, many people mistakenly compare BST with Sydney time, and Sydney may be on AEDT, which changes the offset and can cause missed meetings if the city is not specified clearly.
Is BST vs AEST useful for travel and flight planning?
Yes, especially for travelers connecting between the UK and eastern Australia through hubs such as Singapore, Dubai, Doha, or Hong Kong. Knowing that AEST is 9 hours ahead of BST helps you estimate arrival times, hotel check-in windows, and whether a same-day business meeting in Brisbane is realistic after a long-haul departure from London.