London to Sydney Time Difference

Converting London time to Sydney time involves a large gap of 9 to 11 hours, which varies because the UK and Australia have opposite daylight saving seasons. Use the live dual-clock converter above to see the current time in both cities instantly, or visit Time.now for a full world clock. This page provides a detailed conversion table, scheduling advice, and answers to common questions.

The London to Sydney Time Difference

London operates on Greenwich Mean Time (GMT) (UTC+0) during winter and British Summer Time (BST) (UTC+1) from late March to late October. Sydney uses Australian Eastern Standard Time (AEST, UTC+10) in winter and Australian Eastern Daylight Time (AEDT, UTC+11) from early October to early April. Because the hemispheres have opposite DST seasons, the difference is 11 hours when London is on BST and Sydney on AEST (e.g., April), and 9 hours when London is on GMT and Sydney on AEDT (e.g., January). For most of the year, the difference is 10 or 11 hours. Check the live converter above for the exact current gap.

London to Sydney Conversion Table

Note: The exact Sydney time depends on the current DST status in both cities. Use the live converter for precise conversion.

Best Times to Schedule Calls

The overlap between London business hours (9 am-5 pm) and Sydney business hours (9 am-5 pm) is limited due to the large time difference. The best times are usually early morning in London or late afternoon in Sydney. For example, 9 am London is 6-8 pm Sydney (depending on DST), which works for a quick call. Alternatively, 4 pm London is 1-3 am Sydney, which is not ideal. Below is a table of typical good overlaps.

For more time comparisons, see London To New York Time or London To Los Angeles Time. You can also check time in London directly.

Frequently Asked Questions

What is the current time difference between London and Sydney?

The difference varies between 9 and 11 hours, depending on daylight saving time in both locations. Use the live converter above for the exact current gap.

When does daylight saving start and end in London and Sydney?

London (BST) starts on the last Sunday of March and ends on the last Sunday of October. Sydney (AEDT) starts on the first Sunday of October and ends on the first Sunday of April. Because these periods overlap, the difference changes during the year.

Is Sydney ever behind London?

No, Sydney is always ahead of London. The minimum difference is 9 hours (when London is on GMT and Sydney on AEDT) and the maximum is 11 hours (when London is on BST and Sydney on AEST).

What is the best time to call someone in Sydney from London?

The best overlap is typically early morning in London (7-9 am) which corresponds to late afternoon/early evening in Sydney (4-8 pm). This works for both business and personal calls.

Does the time difference change during the year?

Yes, it changes four times a year due to the opposite DST schedules. The difference is 11 hours from late March to early April, 9 hours from early April to early October, 10 hours from early October to late October, and 11 hours from late October to late March (approximately).

How can I quickly convert London time to Sydney time?

Use the live converter on this page, or add 9-11 hours to London time. For example, 12:00 noon London is 21:00-23:00 Sydney. Check London To Dubai Time for another comparison.