Time difference
Chicago to Sydney Time Difference
Sydney is 15 hours ahead of Chicago — when it's 12:00 PM in Chicago, it's 3:00 AM the next day in Sydney. (Chicago (America/Chicago, CDT); Sydney (Australia/Sydney, AEST).) Below: live local times, the best hours for a call, a full conversion table, and exact daylight-saving dates.
Sydney is 15 hours ahead of Chicago. Standard 9 AM–5 PM business hours in Chicago and Sydney do not overlap, so a live call needs one side outside normal hours. Clocks change on October 4, 2026, which briefly shifts the gap between Chicago and Sydney — the converter on this page always reflects the correct offset for the date you pick.
- When it's 9:00 AM in Chicago, it's 12:00 AM the next day in Sydney.
- When it's 9:00 AM in Sydney, it's 6:00 PM the previous day in Chicago.
Sydney is currently 15 hours ahead of Chicago.
Interactive converter
12:00PM
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Best times to meet
Standard 9 AM – 5 PM hours in Chicago and Sydney do not overlap. The least-bad options are an early start in one city or a late evening call in the other — for example a 7–8 AM meeting in Chicago, or a 6–8 PM meeting in Sydney.
Quick conversion table
| Chicago | Sydney |
|---|---|
| 12 AM | 3:00 PM |
| 1 AM | 4:00 PM |
| 2 AM | 5:00 PM |
| 3 AM | 6:00 PM |
| 4 AM | 7:00 PM |
| 5 AM | 8:00 PM |
| 6 AM | 9:00 PM |
| 7 AM | 10:00 PM |
| 8 AM | 11:00 PM |
| 9 AM | 12:00 AM (next day) |
| 10 AM | 1:00 AM (next day) |
| 11 AM | 2:00 AM (next day) |
| 12 PM | 3:00 AM (next day) |
| 1 PM | 4:00 AM (next day) |
| 2 PM | 5:00 AM (next day) |
| 3 PM | 6:00 AM (next day) |
| 4 PM | 7:00 AM (next day) |
| 5 PM | 8:00 AM (next day) |
| 6 PM | 9:00 AM (next day) |
| 7 PM | 10:00 AM (next day) |
| 8 PM | 11:00 AM (next day) |
| 9 PM | 12:00 PM (next day) |
| 10 PM | 1:00 PM (next day) |
| 11 PM | 2:00 PM (next day) |
Daylight saving
On October 4, 2026, Sydney shifts for daylight saving. After that, Sydney will be 16 hours ahead of Chicago (currently 15 hours ahead of Chicago). The converter and the tables above always reflect the correct offset for the date you pick.
- Chicago is currently observing daylight saving time.
- Sydney is not currently observing daylight saving time (standard time is in effect).
Frequently asked questions
- Is Sydney ahead of or behind Chicago?
- Sydney is 15 hours ahead of Chicago.
- How many hours ahead of Chicago is Sydney?
- Sydney is 15 hours ahead of Chicago.
- What time is 9 AM in Chicago in Sydney?
- 9:00 AM in Chicago is 12:00 AM the next day in Sydney.
- What time is noon in Chicago in Sydney?
- 12:00 PM in Chicago is 3:00 AM the next day in Sydney.
- What time is 5 PM in Chicago in Sydney?
- 5:00 PM in Chicago is 8:00 AM the next day in Sydney. Useful for end-of-day handoffs between the two offices.
- What time is 3 PM in Chicago in Sydney?
- 3:00 PM in Chicago is 6:00 AM the next day in Sydney.
- Is Chicago currently observing daylight saving time?
- Chicago is currently observing daylight saving time (summer time).
- Is Sydney currently observing daylight saving time?
- Sydney observes daylight saving time seasonally, but is not currently on DST (standard time is in effect).
- Do Chicago and Sydney observe daylight saving?
- On October 4, 2026, Sydney shifts for daylight saving. After that, Sydney will be 16 hours ahead of Chicago (currently 15 hours ahead of Chicago). The converter and the tables above always reflect the correct offset for the date you pick.
- When is the best time to call Sydney from Chicago?
- Chicago and Sydney business hours don't overlap. The closest options are early mornings in Chicago or late evenings, when one side stretches outside 9–5.
- When is the best time to call Chicago from Sydney?
- Sydney and Chicago business hours don't overlap. The closest options are early mornings in Sydney or late evenings, when one side stretches outside 9–5.
- Chicago (CDT) to Sydney (AEST) — how do I convert quickly?
- Add 15 hours to Chicago local time to get Sydney local time. Or use the converter at the top of this page — it stays accurate through daylight-saving changes automatically.
Other conversions
- Chicago to New York
- Chicago to London
- Chicago to Tokyo
- Chicago to Dubai
- Chicago to Singapore
- Chicago to Los Angeles
- Chicago to Paris
- Chicago to Mumbai
- Chicago to Hong Kong
- Chicago to San Francisco