This AEST to GMT converter turns any time in Australian Eastern Standard Time (AEST) into Greenwich Mean Time (GMT), using your device clock so daylight saving is applied automatically. GMT is 11 hours behind AEST when both zones are on standard time, and 10 hours behind during the summer months when clocks have shifted. AEST is UTC+10 (AEDT: UTC+11); GMT is UTC+0.
AEST covers Sydney, Melbourne, Canberra; GMT covers Accra, Dakar, London in winter. Because only AEST observes daylight saving time, the difference is not constant through the year. The tables below show both cases, and the converter at the top always uses the rule in force on the date you pick.
AEST and GMT UTC offsets
AEST
UTC+10
Australian Eastern Standard Time
AEDT UTC+11 from April 5 to October 4, 2026
GMT
UTC+0
Greenwich Mean Time
No daylight saving time
AEST to GMT conversion table (standard time)
| AEST | GMT |
|---|---|
| 12 am | 1 pmprevious day |
| 3 am | 4 pmprevious day |
| 6 am | 7 pmprevious day |
| 8 am | 9 pmprevious day |
| 9 am | 10 pmprevious day |
| 10 am | 11 pmprevious day |
| 11 am | 12 am |
| 12 pm | 1 am |
| 1 pm | 2 am |
| 2 pm | 3 am |
| 3 pm | 4 am |
| 4 pm | 5 am |
| 5 pm | 6 am |
| 6 pm | 7 am |
| 8 pm | 9 am |
| 10 pm | 11 am |
AEST to GMT during daylight saving
Between the dates listed above, the difference is 10 hours instead of 11 hours.
| AEST/AEDT | GMT |
|---|---|
| 12 am | 2 pmprevious day |
| 3 am | 5 pmprevious day |
| 6 am | 8 pmprevious day |
| 8 am | 10 pmprevious day |
| 9 am | 11 pmprevious day |
| 10 am | 12 am |
| 11 am | 1 am |
| 12 pm | 2 am |
| 1 pm | 3 am |
| 2 pm | 4 am |
| 3 pm | 5 am |
| 4 pm | 6 am |
| 5 pm | 7 am |
| 6 pm | 8 am |
| 8 pm | 10 am |
| 10 pm | 12 pm |
Frequently asked questions
What is the time difference between AEST and GMT?
GMT is 11 hours behind AEST on standard time. During daylight saving the gap changes to 10 hours. That comes from the UTC offsets: AEST is UTC+10 and GMT is UTC+0. For example, 9 am AEST = 10 pm GMT the previous day, and in summer 9 am AEST = 11 pm GMT the previous day.
Is GMT ahead of or behind AEST?
GMT is 11 hours behind AEST, so when it is noon in AEST it is 1 am in GMT. Ahead means the clock there already shows a later time; a call at 5 pm AEST lands at 6 am GMT.
Does AEST or GMT observe daylight saving time in 2026?
AEST switches to AEDT (UTC+11) on April 5 and back on October 4 in 2026. GMT keeps UTC+0 all year. Between those dates the difference in the table above shifts by an hour, which is the usual cause of missed calls in spring and autumn.
What is the best time for a meeting between AEST and GMT?
Office hours (9 am to 5 pm) do not overlap at all with a 11 hours difference. The least painful options are early morning in GMT or early evening in AEST; for example 8 am AEST = 9 pm GMT the previous day and 6 pm AEST = 7 am GMT. Rotate the inconvenient slot between the two sides for recurring calls.
Which cities use AEST and GMT?
AEST (Australian Eastern Standard Time) is used in Sydney, Melbourne, Canberra, Brisbane (no DST). GMT (Greenwich Mean Time) is used in Accra, Dakar, London in winter. Note that the United Kingdom is only on GMT in winter; from late March to late October London runs on British Summer Time, one hour ahead, so use the BST pages for UK business hours in summer.