Sydney to London time converter
Enter a date and time in Sydney to see the matching time and day in London. Useful for families and firms keeping in touch between Australia and the UK.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Enter date in sydney and time in sydney.
- The result appears straight away and updates as you edit.
- Copy the result, or copy a link that keeps the same values to share it.
How it is calculated
Time in London = time in Sydney - Sydney UTC offset + London UTC offset. London is 9 hours behind Sydney from the first Sunday of April to the first Sunday of October, 11 hours from the last Sunday of October to the last Sunday of March, and 10 hours in the short spells between.
Example
Inputs: Date in Sydney = 2026-07-15, Time in Sydney = 14:00. Result: Time in London: 05:00 Wednesday; Date in London: Wednesday, July 15, 2026 (2026-07-15); London vs Sydney: -9 hours.
Limits and caveats
- Daylight saving dates come from your device time-zone database, so an outdated device may differ on clock-change days.
- The tool converts clock time between the two cities only; it does not show office hours or public holidays.
- During the hour Sydney changes its clocks, the time you enter may not exist or may occur twice, so check the result on that day.
Questions about this tool
What is the time difference between Sydney and London?
London is 9 hours behind Sydney from the first Sunday of April to the first Sunday of October, 11 hours from the last Sunday of October to the last Sunday of March, and 10 hours in the short spells between.
Do Sydney or London change clocks in summer?
Sydney uses daylight saving time, UTC+11, from the first Sunday of October to the first Sunday of April, and UTC+10 the rest of the year. London uses British Summer Time, UTC+1, from the last Sunday of March to the last Sunday of October, and UTC+0 the rest of the year. The tool applies this automatically for the date you pick.
Why does the Sydney to London gap keep changing?
The two cities change clocks on different dates and in opposite directions, so the gap is 9, 10 or 11 hours depending on the date.