GMT to AEST converter: UK time to Sydney time

In 2026 Sydney is 11 hours ahead of London until 29 March, 10 hours ahead from 29 March to 5 April, 9 hours ahead from 5 April to 4 October, 10 hours ahead from 4 to 25 October and 11 hours ahead for the rest of the year, as the UK and Australia change their clocks on different dates.

London12:00 PMSunday 11 Oct · BST

Sydney10:00 PMSunday 11 Oct · AEDT

Sydney is 10 h ahead London today.

London

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Sydney

10111213141516171819202122230123456789

9 to 6 working hoursboth at workNo overlap. Nearest: 7 AM in London is 17:00 in Sydney

Your result

Enter your values to see the result.

Daylight saving: local time and fixed GMT and AEST

The converter starts with London to Sydney, using local clock rules. For the standard-time offsets all year, use the fixed GMT and AEST button.

These examples use noon on the dates shown. A converted date can be the previous or following day.

Starting date and time	Using local city rules	Using fixed GMT and AEST
2026-01-15 12:00	2026-01-15 23:00 (UTC+11:00)	2026-01-15 22:00
2026-07-15 12:00	2026-07-15 21:00 (UTC+10:00)	2026-07-15 22:00

12:00 PM Wednesday 15 Jul in London is 9:00 PM Wednesday 15 Jul in Sydney (AEST, 9 h ahead).

Why daylight saving conversions need a date explains skipped and repeated clock readings. The rules here come from the browser’s time zone data and can lag a government change.