London to Sydney Time Converter
Sydney is 11 hours ahead of London from late October to late March (GMT and AEDT) and 9 hours ahead from early April to early October (BST and AEST). For a few weeks in between the gap is 10 hours. 9:00 AM in London is 6:00 PM in Sydney in northern summer and 8:00 PM in northern winter.
Three Gaps and the Dates They Change
Both cities change their clocks, in opposite seasons, so Sydney is ahead by 9, 10 or 11 hours:
- 11 hours (GMT and AEDT): from the last Sunday in October to the last Sunday in March.
- 9 hours (BST and AEST): from the first Sunday in April to the first Sunday in October.
- 10 hours (BST and AEDT): from the last Sunday in March to the first Sunday in April, and from the first Sunday in October to the last Sunday in October.
The 10-hour stretches are one week in spring and three to four weeks in autumn, the weeks when only one city has changed.
Early Morning in London Is Late Afternoon in Sydney
The two 9-to-5 days never meet: London's 9:00 AM start is already 6:00 PM in Sydney on the best gap, after Sydney has closed. A live call means London starts early to catch Sydney's last working hour. On the 9-hour gap, 7:00 to 8:00 AM London is 4:00 PM to 5:00 PM in Sydney; on the 11-hour gap the same Sydney hour is 4:00 PM to 5:00 PM in London.
| London | Sydney |
|---|---|
| 7:00 AM–8:00 AM | 4:00 PM–5:00 PM |
| BST → AEST: London: before 9 AM. Sydney: inside 9 AM–5 PM. The best case: 9 hours, and this is Sydney's last working hour. | |
| 6:00 AM–7:00 AM | 4:00 PM–5:00 PM |
| BST → AEDT: London: before 9 AM. Sydney: inside 9 AM–5 PM. The 10-hour weeks: London starts an hour earlier for the same Sydney hour. | |
| 5:00 AM–6:00 AM | 4:00 PM–5:00 PM |
| GMT → AEDT: London: before 9 AM. Sydney: inside 9 AM–5 PM. With an 11-hour gap London has to start at 5 AM to reach Sydney's last hour. | |
"Inside 9 AM–5 PM" is a planning assumption for a standard office day on each side, not a claim about any company's hours.
London Hours in Sydney Time
Full 24-hour reference table. Use the live clocks above for the exact current offset.
| 🇬🇧 GMT/BST | 🇦🇺 GMT → AEDTUTC+0 to UTC+11, late October to late March | 🇦🇺 BST → AESTUTC+1 to UTC+10, early April to early October | 🇦🇺 BST → AEDTUTC+1 to UTC+11, a few weeks a year |
|---|---|---|---|
| 00:00 | 11:00 AM | 9:00 AM | 10:00 AM |
| 01:00 | 12:00 PM | 10:00 AM | 11:00 AM |
| 02:00 | 1:00 PM | 11:00 AM | 12:00 PM |
| 03:00 | 2:00 PM | 12:00 PM | 1:00 PM |
| 04:00 | 3:00 PM | 1:00 PM | 2:00 PM |
| 05:00 | 4:00 PM | 2:00 PM | 3:00 PM |
| 06:00 | 5:00 PM | 3:00 PM | 4:00 PM |
| 07:00 | 6:00 PM | 4:00 PM | 5:00 PM |
| 08:00 | 7:00 PM | 5:00 PM | 6:00 PM |
| 09:00 | 8:00 PM | 6:00 PM | 7:00 PM |
| 10:00 | 9:00 PM | 7:00 PM | 8:00 PM |
| 11:00 | 10:00 PM | 8:00 PM | 9:00 PM |
| 12:00 | 11:00 PM | 9:00 PM | 10:00 PM |
| 13:00 | 12:00 AMnext day | 10:00 PM | 11:00 PM |
| 14:00 | 1:00 AMnext day | 11:00 PM | 12:00 AMnext day |
| 15:00 | 2:00 AMnext day | 12:00 AMnext day | 1:00 AMnext day |
| 16:00 | 3:00 AMnext day | 1:00 AMnext day | 2:00 AMnext day |
| 17:00 | 4:00 AMnext day | 2:00 AMnext day | 3:00 AMnext day |
| 18:00 | 5:00 AMnext day | 3:00 AMnext day | 4:00 AMnext day |
| 19:00 | 6:00 AMnext day | 4:00 AMnext day | 5:00 AMnext day |
| 20:00 | 7:00 AMnext day | 5:00 AMnext day | 6:00 AMnext day |
| 21:00 | 8:00 AMnext day | 6:00 AMnext day | 7:00 AMnext day |
| 22:00 | 9:00 AMnext day | 7:00 AMnext day | 8:00 AMnext day |
| 23:00 | 10:00 AMnext day | 8:00 AMnext day | 9:00 AMnext day |
* "next day" = converted time falls on the following calendar day.
An 8 AM Call, Season by Season
8:00 AM in London is 5:00 PM in Sydney on the 9-hour gap, 6:00 PM on the 10-hour gap and 7:00 PM on the 11-hour gap. Going the other way, 9:00 AM in Sydney is 12:00 AM in London at 9 hours and 10:00 PM the previous day at 11 hours, always the previous day.
Because the gap moves in both directions through the year, check the date for a recurring call rather than relying on the number you used last time.