AEST to CST Converter
See the current time in AEST (Sydney) and CST (Chicago) side by side, the exact time difference right now, and convert any time between the two zones.
AEST to CST Converter
Uses your browser's built-in, DST-aware time-zone data.
About converting AEST to CST
Australian Eastern Time (Sydney) and Central Time (Chicago) are in different time zones, so a meeting, call or stream that's convenient in one may be early or late in the other. The clocks above update live and account for daylight saving automatically, so the time difference you see is the real one for today — not a fixed number that goes stale twice a year.
To plan across the two, type a time into the AEST box (or tap a quick preset) and read the CST equivalent, including a "next day" or "previous day" note when the conversion crosses midnight. For any other pair of zones or cities, use the full timezone converter.
AEST vs CST: the time difference through the year
The gap between AEST and CST changes during the year because they switch to and from daylight saving on different dates.
| Period | Difference |
|---|---|
| Oct 23, 2026 – Oct 31, 2026 | CST 16 h behind AEST |
| Nov 1, 2026 – Mar 13, 2027 | CST 17 h behind AEST |
| Mar 14, 2027 – Apr 3, 2027 | CST 16 h behind AEST |
| Apr 4, 2027 – Oct 2, 2027 | CST 15 h behind AEST |
| Oct 3, 2027 – Oct 23, 2027 | CST 16 h behind AEST |
Daylight-saving changes in the next year
| Zone | Date | Offset | Change |
|---|---|---|---|
| AEST | Apr 4, 2027 | UTC+11 → UTC+10 | Clocks go back 1 hour |
| AEST | Oct 3, 2027 | UTC+10 → UTC+11 | Clocks go forward 1 hour |
| CST | Nov 1, 2026 | UTC−5 → UTC−6 | Clocks go back 1 hour |
| CST | Mar 14, 2027 | UTC−6 → UTC−5 | Clocks go forward 1 hour |
| CST | Nov 7, 2027 | UTC−5 → UTC−6 | Clocks go back 1 hour |
AEST to CST conversion table
| AEST | CST (when 16 h behind) | CST (when 17 h behind) |
|---|---|---|
| 12:00 AM | 8:00 AM (previous day) | 7:00 AM (previous day) |
| 1:00 AM | 9:00 AM (previous day) | 8:00 AM (previous day) |
| 2:00 AM | 10:00 AM (previous day) | 9:00 AM (previous day) |
| 3:00 AM | 11:00 AM (previous day) | 10:00 AM (previous day) |
| 4:00 AM | 12:00 PM (previous day) | 11:00 AM (previous day) |
| 5:00 AM | 1:00 PM (previous day) | 12:00 PM (previous day) |
| 6:00 AM | 2:00 PM (previous day) | 1:00 PM (previous day) |
| 7:00 AM | 3:00 PM (previous day) | 2:00 PM (previous day) |
| 8:00 AM | 4:00 PM (previous day) | 3:00 PM (previous day) |
| 9:00 AM | 5:00 PM (previous day) | 4:00 PM (previous day) |
| 10:00 AM | 6:00 PM (previous day) | 5:00 PM (previous day) |
| 11:00 AM | 7:00 PM (previous day) | 6:00 PM (previous day) |
| 12:00 PM | 8:00 PM (previous day) | 7:00 PM (previous day) |
| 1:00 PM | 9:00 PM (previous day) | 8:00 PM (previous day) |
| 2:00 PM | 10:00 PM (previous day) | 9:00 PM (previous day) |
| 3:00 PM | 11:00 PM (previous day) | 10:00 PM (previous day) |
| 4:00 PM | 12:00 AM | 11:00 PM (previous day) |
| 5:00 PM | 1:00 AM | 12:00 AM |
| 6:00 PM | 2:00 AM | 1:00 AM |
| 7:00 PM | 3:00 AM | 2:00 AM |
| 8:00 PM | 4:00 AM | 3:00 AM |
| 9:00 PM | 5:00 AM | 4:00 AM |
| 10:00 PM | 6:00 AM | 5:00 AM |
| 11:00 PM | 7:00 AM | 6:00 AM |
Best time to meet
- 9 AM–5 PM overlap when CST is 16 h behindnone — closest fit 8:00 AM–12:00 PM AEST = 4:00 PM–8:00 PM CST (8 AM–8 PM in both)
- 9 AM–5 PM overlap when CST is 17 h behind9:00 AM–10:00 AM AEST = 4:00 PM–5:00 PM CST (1 h)
The two zones
Sydney is on AEST (UTC+10) from April to October and on daylight-saving AEDT (UTC+11) from the first Sunday in October to the first Sunday in April. Queensland (Brisbane) stays on AEST all year.
Central Time is UTC−6 in winter (CST) and UTC−5 in summer (CDT). It covers Chicago, Dallas, Houston, Mexico City (which no longer uses DST) and Winnipeg. US daylight saving runs from the second Sunday in March to the first Sunday in November.