AEST to GMT Converter

Australian Eastern Standard Time → Greenwich Mean Time · AEST is 10 hours ahead of GMT

AEST
—
GMT
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AEST and GMT are the same time

AEST to GMT Conversion Table

AESTGMT
12:00 AM12:00 AM
1:00 AM1:00 AM
2:00 AM2:00 AM
3:00 AM3:00 AM
4:00 AM4:00 AM
5:00 AM5:00 AM
6:00 AM6:00 AM
7:00 AM7:00 AM
8:00 AM8:00 AM
9:00 AM9:00 AM
10:00 AM10:00 AM
11:00 AM11:00 AM
12:00 PM12:00 PM
1:00 PM1:00 PM
2:00 PM2:00 PM
3:00 PM3:00 PM
4:00 PM4:00 PM
5:00 PM5:00 PM
6:00 PM6:00 PM
7:00 PM7:00 PM
8:00 PM8:00 PM
9:00 PM9:00 PM
10:00 PM10:00 PM
11:00 PM11:00 PM

Green rows = business hours overlap (9:00 AM – 6:00 PM AEST)

Major AEST Cities
  • Sydney
  • Melbourne
  • Brisbane
  • Canberra
  • Newcastle
  • Wollongong
Major GMT Cities
  • London
  • Dublin
  • Lisbon
  • Reykjavik
  • Accra
  • Abuja
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AEST vs GMT — Sydney to London

AEST (UTC+10) — Australian Eastern Standard Time. NSW, VIC, ACT, and TAS observe AEDT (UTC+11) in Southern Hemisphere summer (October–April). Queensland remains on AEST year-round.

GMT (UTC+0) — UK winter time. London uses BST (UTC+1) from late March to late October.

The Sydney–London corridor spans roughly half the globe. The overlap window is narrow: 7:00–9:00 PM AEST = 9:00–11:00 AM GMT in winter. This is the most common window for Australia–UK business calls and financial trading desk handoffs.

Frequently Asked Questions

How many hours is AEST ahead of GMT?

AEST (Australian Eastern Standard Time, UTC+10) is 10 hours ahead of GMT (UTC+0). During Australian DST (AEDT, UTC+11), the gap increases to 11 hours. During UK BST (UTC+1), AEST is only 9 hours ahead. The gap fluctuates between 9 and 11 hours across the year as both regions shift clocks in opposite seasons.

What is 9 AM AEST in GMT?

9:00 AM AEST (Sydney) is 11:00 PM GMT the previous night. This means Sydney mornings overlap only with London late evenings. The best practical window is 7:00–9:00 PM AEST = 9:00–11:00 AM GMT, catching London's morning while Sydney wraps up its business day.

What is the best time to schedule a Sydney–London call?

In winter (GMT/AEST): 7:00–9:00 PM AEST = 9:00–11:00 AM GMT. In summer (BST/AEDT): 8:00–10:00 PM AEDT = 9:00–11:00 AM BST. Sydney late afternoon to evening is the prime window for catching London's morning business hours.

Does the AEST to GMT gap change throughout the year?

Yes. The gap changes when either region shifts clocks. Australia (AEST → AEDT) shifts in October and back in April. The UK (GMT → BST) shifts in late March and back in late October. The standard 10-hour gap (AEST/GMT) can shrink to 9 hours (AEST/BST in UK summer) or grow to 11 hours (AEDT/GMT in Australian summer).