London
Sydney
Convert BST to AEST
British Summer Time to Australian Eastern Standard Time — Sydney is 9 hours ahead of London
Quick Facts
Time Difference
+9 hours
BST Full Name
British Summer Time
AEST Full Name
Australian Eastern Standard Time
BST to AEST Conversion Table
Related Conversions
About BST and AEST Time Zones
BST (British Summer Time) is UTC+1 and covers cities like London, Edinburgh, Cardiff. AEST (Australian Eastern Standard Time) is UTC+10 and covers cities like Sydney, Melbourne, Brisbane.
When it's 12:00 PM (noon) in London (BST), it's 9:00 PM in Sydney (AEST). The time difference between BST and AEST is 9 hours — Sydney is ahead of London.
A workday starting at 9 AM in London corresponds to 6:00 PM in Sydney, giving a short overlap window for morning meetings.
Daylight Saving Time
AEST observes Daylight Saving Time and becomes AEDT (Australian Eastern Daylight Time) during summer months, shifting clocks forward by 1 hour to UTC+11.
During DST transitions, the time difference between BST and AEST may shift by ±1 hour. Always verify the current offset above for the most accurate conversion.
Use our world clock tool to compare London and Sydney with a visual timeline, or browse more timezone conversions.
Frequently Asked Questions
What is the time difference between BST and AEST?
Sydney (AEST) is 9 hours ahead of London (BST). The offset is +9 hours.
Is AEST ahead or behind BST?
AEST is 9 hours ahead of BST. BST is UTC+1 and AEST is UTC+10.
When it's 12:00 PM in London, what time is it in Sydney?
When it's 12:00 PM (noon) in London (BST), it's 9:00 PM in Sydney (AEST).
When it's 5:00 PM in London, what time is it in Sydney?
When it's 5:00 PM in London (BST), it's 2:00 AM in Sydney (AEST).
Does AEST change for Daylight Saving Time?
Yes. AEST (Australian Eastern Standard Time, UTC+10) becomes AEDT (Australian Eastern Daylight Time, UTC+11) in summer, shifting clocks forward 1 hour.