🇺🇸 Chicago to 🇦🇺 Sydney time
Sydney is 15 hours ahead Chicago
Convert a specific time
When it is in Chicago, it is 00:00 in Sydney.
Chicago to Sydney — hour by hour
| 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 +1d |
| 10:00 | 01:00 +1d |
| 11:00 | 02:00 +1d |
| 12:00 | 03:00 +1d |
| 13:00 | 04:00 +1d |
| 14:00 | 05:00 +1d |
| 15:00 | 06:00 +1d |
| 16:00 | 07:00 +1d |
| 17:00 | 08:00 +1d |
| 18:00 | 09:00 +1d |
| 19:00 | 10:00 +1d |
| 20:00 | 11:00 +1d |
| 21:00 | 12:00 +1d |
| 22:00 | 13:00 +1d |
| 23:00 | 14:00 +1d |
Time difference by month (2026)
How far Sydney runs ahead (+) or behind (−) Chicago on the 15th of each month.
| Jan | +17h |
| Feb | +17h |
| Mar | +16h |
| Apr | +15h |
| May | +15h |
| Jun | +15h |
| Jul | +15h |
| Aug | +15h |
| Sep | +15h |
| Oct | +16h |
| Nov | +17h |
| Dec | +17h |
The gap is not constant: because of daylight saving changeovers it shifts in Mar and Apr, among other dates, so double-check around those months when scheduling ahead.
Time difference between Chicago and Sydney
Sydney (Australia/Sydney) is currently 15 hours ahead Chicago (America/Chicago). When it is 09:00 in Chicago, it is 00:00 in Sydney. One or both cities observe daylight saving time, so this difference can change with the seasons — the clocks and table on this page always reflect the current rules.
Best time to call between Chicago and Sydney
For a call or meeting, there is no overlap between normal working hours (09:00–18:00) in the two cities — one side will need an early morning or late evening call.
Going the other way?
See the reverse conversion: Sydney to Chicago time, or the city pages for Chicago and Sydney.