Time difference between Chicago and Sydney
Chicago and Sydney are in different time zones. Below, you'll find the current time in both cities, the exact time difference, and a suggestion for when it's convenient to call.
Sydney is 15 hr ahead of Chicago
When to call
Working hours (9:00–18:00) in these cities do not overlap because the time difference is too large. You'll have to call early in the morning or late in the evening.
Hour-by-hour comparison
On the left is the time in Chicago; on the right, the corresponding time in Sydney.
| Chicago | Sydney |
|---|---|
| 00:00 | 15:00 |
| 01:00 | 16:00 |
| 02:00 | 17:00 |
| 03:00 | 18:00 |
| 04:00 | 19:00 |
| 05:00 | 20:00 |
| 06:00 | 21:00 |
| 07:00 | 22:00 |
| 08:00 | 23:00 |
| 09:00 | 00:00 |
| 10:00 | 01:00 |
| 11:00 | 02:00 |
| 12:00 | 03:00 |
| 13:00 | 04:00 |
| 14:00 | 05:00 |
| 15:00 | 06:00 |
| 16:00 | 07:00 |
| 17:00 | 08:00 |
| 18:00 | 09:00 |
| 19:00 | 10:00 |
| 20:00 | 11:00 |
| 21:00 | 12:00 |
| 22:00 | 13:00 |
| 23:00 | 14:00 |
Time zones
| Chicago — Time zone | America/Chicago |
| Chicago — UTC offset | UTC-5 |
| Sydney — Time zone | Australia/Sydney |
| Sydney — UTC offset | UTC+10 |
Frequently asked questions
How many hours is Chicago ahead of or behind Sydney?
The current difference is 15 hr. It may change twice a year if the clocks are changed in either city.
Does the time difference change during the year?
Yes, if daylight saving time is observed in at least one of the cities. The values on this page are recalculated automatically.
When is the best time to call?
See the “When to call” section above: it shows the overlap between the working hours of both cities.
Calculated using the IANA time zone database. Daylight saving time is taken into account automatically.