Convert Greenwich Mean Time to Australian Eastern Standard Time - Quick & Accurate
Updates live every second
Hover over any hour to see corresponding time in both zones
To schedule a meeting between GMT and AEST:
Pro Tip: Schedule calls at 9:00 AM GMT for optimal timing - early enough for UK business hours while still reasonable evening time (7:00 PM) in Sydney
| GMT Time | AEST Time | Context |
|---|---|---|
| 12:00 AM | 11:00 AM | Midnight GMT |
| 01:00 AM | 12:00 PM | Late Night UK |
| 02:00 AM | 01:00 PM | Late Night UK |
| 03:00 AM | 02:00 PM | Late Night UK |
| 04:00 AM | 03:00 PM | Late Night UK |
| 05:00 AM | 04:00 PM | Late Night UK |
| 06:00 AM | 05:00 PM | Early Morning GMT |
| 07:00 AM | 06:00 PM | Night Time |
| 08:00 AM | 07:00 PM | Work Starts GMT |
| 09:00 AM | 08:00 PM | Meeting Window |
| 10:00 AM | 09:00 PM | Meeting Window |
| 11:00 AM | 10:00 PM | GMT Afternoon |
BST (UTC+1) from late March to late October
Europe/London
AEDT (UTC+11) from early October to early April (not in QLD)
Australia/Sydney
| Greenwich Mean Time (GMT) | Australian Eastern Standard Time (AEST) |
|---|---|
Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London (UTC+0). During daylight saving time, the UK observes British Summer Time (BST), which is UTC+1. | Australian Eastern Standard Time (AEST) is 10 hours ahead of Coordinated Universal Time (UTC+10). During daylight saving time, the region observes Australian Eastern Daylight Time (AEDT), which is UTC+11. |
Where Is It Used? | |
|
|
Geographic Context | |
Prime MeridianGMT is based on the Prime Meridian (0° longitude) which passes through the Royal Observatory in Greenwich, London. It is the historical basis for the world's time zones. Global InfluenceGMT is often used interchangeably with UTC, though technically GMT is a time zone while UTC is a time standard. | Eastern AustraliaAEST covers Australia's eastern states where approximately 80% of Australia's population lives. It's one of three main time zones in Australia. Queensland ExceptionQueensland uses AEST year-round and does not observe daylight saving time, unlike NSW, VIC, ACT, and TAS. |
Key Facts | |
|
|
AEST (Australian Eastern Standard Time) is 10 hours ahead of GMT. However, this can vary between 9-11 hours depending on daylight saving transitions. When UK observes BST and Australia observes standard time, the difference is 9 hours. When UK observes GMT and Australia observes AEDT, the difference is 11 hours.
The best time to call from GMT to AEST is between 8:00 AM and 10:00 AM GMT, which corresponds to 6:00 PM to 8:00 PM AEST. This narrow window ensures GMT is within early business hours while AEST is in the evening, providing very limited but workable overlap.
Yes, the time difference varies because UK and Australia observe daylight saving at opposite times of the year. The standard difference is 10 hours (GMT to AEST). During UK summer (BST) while Australia is in standard time, it's 9 hours. During Australian summer (AEDT) while UK is in standard time, it's 11 hours.
GMT cities include London, Manchester, Birmingham, Liverpool, and Edinburgh. AEST cities include Sydney, Melbourne, Brisbane, Canberra, and Newcastle. These represent the most populous cities in the UK and eastern Australia.
In the UK, BST starts on the last Sunday in March and ends on the last Sunday in October. In Australia, AEDT starts on the first Sunday in October and ends on the first Sunday in April. Note that Brisbane (Queensland) does not observe daylight saving time.