Turn a South Australian Time reading into Coordinated Universal Time. The panels show both clocks live, and the roller lets you line up any ACST/ACDT time against its UTC equivalent.
South Australian Time
Coordinated Universal Time
US Eastern Time
THE CLOCKS ABOVE ALWAYS SHOW THE LIVE CURRENT TIME. THE ROLLER BELOW IS A LOOKUP TOOL — ROTATING IT NEVER CHANGES THEM.
UTC reference date: Sat, 03 Oct 2026. The roller wraps within this date.
Offsets below apply to the selected time.
Sun, 04 Oct 2026
Sat, 03 Oct 2026
Sat, 03 Oct 2026
ACST/ACDT is 10 hours 30 minutes ahead of UTC
ET is 4 hours behind UTC
Australia (Adelaide) is 14 hours 30 minutes ahead of United States (Eastern)
This hourly table is for today in UTC. Use the converter above to choose a different date or an exact minute.
| ACST/ACDT | UTC | Local date |
|---|---|---|
| 09:30 | 00:00 | Sat, 03 Oct 2026Same day |
| 10:30 | 01:00 | Sat, 03 Oct 2026Same day |
| 11:30 | 02:00 | Sat, 03 Oct 2026Same day |
| 12:30 | 03:00 | Sat, 03 Oct 2026Same day |
| 13:30 | 04:00 | Sat, 03 Oct 2026Same day |
| 14:30 | 05:00 | Sat, 03 Oct 2026Same day |
| 15:30 | 06:00 | Sat, 03 Oct 2026Same day |
| 16:30 | 07:00 | Sat, 03 Oct 2026Same day |
| 17:30 | 08:00 | Sat, 03 Oct 2026Same day |
| 18:30 | 09:00 | Sat, 03 Oct 2026Same day |
| 19:30 | 10:00 | Sat, 03 Oct 2026Same day |
| 20:30 | 11:00 | Sat, 03 Oct 2026Same day |
| 21:30 | 12:00 | Sat, 03 Oct 2026Same day |
| 22:30 | 13:00 | Sat, 03 Oct 2026Same day |
| 23:30 | 14:00 | Sat, 03 Oct 2026Same day |
| 00:30 | 15:00 | Sun, 04 Oct 2026Previous day in UTC |
| 01:30 | 16:00 | Sun, 04 Oct 2026Previous day in UTC |
| 03:30 | 17:00 | Sun, 04 Oct 2026Previous day in UTC |
| 04:30 | 18:00 | Sun, 04 Oct 2026Previous day in UTC |
| 05:30 | 19:00 | Sun, 04 Oct 2026Previous day in UTC |
| 06:30 | 20:00 | Sun, 04 Oct 2026Previous day in UTC |
| 07:30 | 21:00 | Sun, 04 Oct 2026Previous day in UTC |
| 08:30 | 22:00 | Sun, 04 Oct 2026Previous day in UTC |
| 09:30 | 23:00 | Sun, 04 Oct 2026Previous day in UTC |
South Australian Time is the local clock in Adelaide. Converting it to UTC removes the local offset so the time can be shared with anyone in the world without ambiguity — which is exactly why UTC is used for servers, aviation and international scheduling.
South Australia's half-hour offset differs from Sydney. Adelaide also changes seasonally, so use the conversion date rather than a fixed difference.
Subtract the current offset shown in the offset panel from the local ACST/ACDT time. If the result goes below 00:00, UTC is still on the previous date. Use the roller to read the pairing directly instead of doing the arithmetic.
Because ACST/ACDT observes daylight saving time, the gap to UTC is not fixed — every clock and table on this page is calculated live from the Australia/Adelaide IANA database, and the selected result uses the offset for its selected UTC instant.
Early-morning or late-night local times frequently sit on a different UTC date. The converter labels every selection as SAME DAY, NEXT DAY or PREVIOUS DAY so a deadline written in UTC is never off by 24 hours.
Adelaide uses UTC +09:30 in standard time and UTC +10:30 during daylight saving time.