ACDT to GMT Converter
This page converts Australian Central Daylight Time (ACDT) to Greenwich Mean Time (GMT). GMT is 10 hours and 30 minutes behind ACDT, so a meeting at one time slides predictably to the other. Edit the time or date to begin.
Daylight saving notes
In southern Australia, daylight saving time runs from the first Sunday in October to the first Sunday in April. That affects Australian Central Daylight Time (ACDT).
ACDT to GMT conversion chart
For example, a 9:00 AM ACDT meeting takes place at 10:30 PM GMT (−1 day). Concretely, when Adelaide (ACDT) and London (winter) (GMT) set up a call, gMT is 10 hours and 30 minutes behind ACDT.
| ACDT time | GMT time |
|---|---|
| 12:00 AM | 1:30 PM−1 day |
| 1:00 AM | 2:30 PM−1 day |
| 2:00 AM | 3:30 PM−1 day |
| 3:00 AM | 4:30 PM−1 day |
| 4:00 AM | 5:30 PM−1 day |
| 5:00 AM | 6:30 PM−1 day |
| 6:00 AM | 7:30 PM−1 day |
| 7:00 AM | 8:30 PM−1 day |
| 8:00 AM | 9:30 PM−1 day |
| 9:00 AM | 10:30 PM−1 day |
| 10:00 AM | 11:30 PM−1 day |
| 11:00 AM | 12:30 AM |
| 12:00 PM | 1:30 AM |
| 1:00 PM | 2:30 AM |
| 2:00 PM | 3:30 AM |
| 3:00 PM | 4:30 AM |
| 4:00 PM | 5:30 AM |
| 5:00 PM | 6:30 AM |
| 6:00 PM | 7:30 AM |
| 7:00 PM | 8:30 AM |
| 8:00 PM | 9:30 AM |
| 9:00 PM | 10:30 AM |
| 10:00 PM | 11:30 AM |
| 11:00 PM | 12:30 PM |
This chart uses the fixed ACDT and GMT offsets; the live converter above follows current daylight saving.
Convert ACDT to GMT Time Zone
A quick guide to ACDT → GMT: the time gap, the live clocks, scheduling tips, and how we keep it accurate.
How do I convert ACDT to GMT?
It takes three quick steps:
- Click the ACDT field on the left and pick the time you want to convert.
- The matching GMT time updates on the right automatically — there’s no button to press.
- Need a different day? Click the date field and the result follows, rolling over if it crosses midnight.
ACDT vs GMT: what's the time gap?
GMT is 10 hours and 30 minutes behind ACDT. In everyday terms, once you know the time on one side you just subtract 10 hours 30 min to get the other — so a call between Adelaide and London (winter) is always 10 hours 30 min apart.
What's the current time in GMT?
Right now the time in Greenwich Mean Time (GMT) is Monday, June 29, 2026 · 5:54:05 PM. It ticks every second, so you’re always looking at the live GMT clock.
And what time is it in ACDT?
And in Australian Central Daylight Time (ACDT), it’s currently Tuesday, June 30, 2026 · 4:24:05 AM. Compare the two and the 10 hours 30 min gap is easy to see.
What's the best time for a ACDT–GMT call?
For example, a 9:00 AM ACDT meeting takes place at 10:30 PM GMT (−1 day). The trick is to aim for a slot that lands inside normal working hours on both sides. Once you’ve found a time, hit Share on the converter to copy a link with the time built in — easy to send to a colleague. Juggling three or more zones? The meeting planner highlights the hours that overlap for everyone.
Does daylight saving time change the ACDT–GMT difference?
The labels ACDT and GMT are fixed offsets, so the result on this page is always exact. One side switches between standard and summer time while the other stays put, so the real-world gap can shift by an hour for part of the year. It's worth checking which label a region is actually using before you lock in a time.
How accurate is this ACDT to GMT conversion?
We don’t guess. ACDT and GMT times are worked out from the official IANA time zone database, the trusted standard that operating systems use worldwide. Because daylight-saving rules and regional offsets do change over time, we track those updates rather than relying on a fixed number — which is exactly where many converters slip up.
Convert ACDT to other time zones
- UTC Coordinated Universal Time
- GMT Greenwich Mean Time
- EST Eastern Standard Time
- EDT Eastern Daylight Time
- CST Central Standard Time
- CDT Central Daylight Time
- MST Mountain Standard Time
- MDT Mountain Daylight Time
- PST Pacific Standard Time
- PDT Pacific Daylight Time
- AKST Alaska Standard Time
- AKDT Alaska Daylight Time
- HST Hawaii Standard Time
- AST Atlantic Standard Time
- ADT Atlantic Daylight Time
- NST Newfoundland Standard Time
- NDT Newfoundland Daylight Time
- BRT Brasília Time
- ART Argentina Time
- WET Western European Time
- WEST Western European Summer Time
- CET Central European Time
- CEST Central European Summer Time
- EET Eastern European Time
- EEST Eastern European Summer Time
- BST British Summer Time
- IST Irish Standard Time
- MSK Moscow Standard Time
- TRT Turkey Time
- WAT West Africa Time
- CAT Central Africa Time
- EAT East Africa Time
- SAST South Africa Standard Time
- GST Gulf Standard Time
- IST Israel Standard Time
- IDT Israel Daylight Time
- IST India Standard Time
- PKT Pakistan Standard Time
- BDT Bangladesh Standard Time
- ICT Indochina Time
- WIB Western Indonesian Time
- WITA Central Indonesian Time
- WIT Eastern Indonesian Time
- CST China Standard Time
- HKT Hong Kong Time
- SGT Singapore Time
- PHT Philippine Time
- JST Japan Standard Time
- KST Korea Standard Time
- AWST Australian Western Standard Time
- ACST Australian Central Standard Time
- AEST Australian Eastern Standard Time
- AEDT Australian Eastern Daylight Time
- NZST New Zealand Standard Time
- NZDT New Zealand Daylight Time
Convert to GMT from other time zones
- UTC Coordinated Universal Time
- EST Eastern Standard Time
- EDT Eastern Daylight Time
- CST Central Standard Time
- CDT Central Daylight Time
- MST Mountain Standard Time
- MDT Mountain Daylight Time
- PST Pacific Standard Time
- PDT Pacific Daylight Time
- AKST Alaska Standard Time
- AKDT Alaska Daylight Time
- HST Hawaii Standard Time
- AST Atlantic Standard Time
- ADT Atlantic Daylight Time
- NST Newfoundland Standard Time
- NDT Newfoundland Daylight Time
- BRT Brasília Time
- ART Argentina Time
- WET Western European Time
- WEST Western European Summer Time
- CET Central European Time
- CEST Central European Summer Time
- EET Eastern European Time
- EEST Eastern European Summer Time
- BST British Summer Time
- IST Irish Standard Time
- MSK Moscow Standard Time
- TRT Turkey Time
- WAT West Africa Time
- CAT Central Africa Time
- EAT East Africa Time
- SAST South Africa Standard Time
- GST Gulf Standard Time
- IST Israel Standard Time
- IDT Israel Daylight Time
- IST India Standard Time
- PKT Pakistan Standard Time
- BDT Bangladesh Standard Time
- ICT Indochina Time
- WIB Western Indonesian Time
- WITA Central Indonesian Time
- WIT Eastern Indonesian Time
- CST China Standard Time
- HKT Hong Kong Time
- SGT Singapore Time
- PHT Philippine Time
- JST Japan Standard Time
- KST Korea Standard Time
- AWST Australian Western Standard Time
- ACST Australian Central Standard Time
- ACDT Australian Central Daylight Time
- AEST Australian Eastern Standard Time
- AEDT Australian Eastern Daylight Time
- NZST New Zealand Standard Time
- NZDT New Zealand Daylight Time
Frequently asked questions
How many hours behind ACDT is GMT?
GMT is 10 hours and 30 minutes behind ACDT — a fixed 10 hours and 30 minutes difference, since both are fixed-offset labels.
What time is it in GMT when it's 12:00 PM ACDT?
When it's 12:00 PM (noon) ACDT, it's 1:30 AM GMT.
Do ACDT or GMT use daylight saving time?
Australian Central Daylight Time (ACDT) observes daylight saving, alternating with ACST; Greenwich Mean Time (GMT) is a fixed offset with no daylight saving.
Why might the real-world ACDT–GMT difference change during the year?
The labels ACDT and GMT are fixed offsets, so this converter is always exact. But Australian Central Daylight Time's region switches between standard and summer time, so for part of the year you may actually want ACST to GMT. Always check which label a region is currently using before you schedule.