London to Sydney time converter
Pick a date and time in London to see the matching time and day in Sydney. In January Sydney is 11 hours ahead of London; in July Sydney is 9 hours ahead of London.
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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 london and time in london.
- 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
Sydney time = London time + (Sydney UTC offset - London UTC offset), with both offsets read for the chosen date from the IANA time-zone database (Europe/London, Australia/Sydney).
Example
Inputs: Date in London = 2026-01-15, Time in London = 09:00. Result: Time in Sydney: 20:00 Thursday; Date in Sydney: Thursday, January 15, 2026 (2026-01-15); Sydney vs London: +11 hours.
Limits and caveats
- Daylight saving dates come from your device time-zone database, so results can differ if it is outdated or a country changed its rules recently.
- A time skipped when London moves its clocks forward is shifted one hour later.
Questions about this tool
What is the time difference between London and Sydney?
In January Sydney is 11 hours ahead of London; in July Sydney is 9 hours ahead of London. It is 10 hours from the last Sunday of March to the first Sunday of April, and from the first Sunday of October to the last Sunday of October.
Do London or Sydney change their clocks in summer?
London uses British Summer Time (UTC+1) from the last Sunday of March to the last Sunday of October and GMT (UTC+0) the rest of the year. Sydney uses daylight time (UTC+11) from the first Sunday of October to the first Sunday of April and UTC+10 the rest of the year.
Why does Sydney sometimes show a different date?
Sydney is ahead of London, so a late evening time in London can fall after midnight in Sydney. The tool shows the correct Sydney date and weekday for every conversion.