Compare the current local time in Chicago and Sydney side by side, with the live time difference, a quick conversion table, and the overlapping working hours for scheduling calls.
Current difference calculated live in your browser.
Current 24-hour conversion is calculated live in your browser.
There is little or no overlap in standard 9–5 working hours, so a call will fall outside business hours for one side.
Planning a call between Chicago and Sydney
The current difference is calculated live above. The clocks above are live and adjust automatically for daylight saving time, so the difference is always current. For a full visual overlap across more cities, use the meeting planner, or view each city on its own page: time in Chicago and time in Sydney.
Why the time difference can change
Chicago uses America/Chicago and Sydney uses Australia/Sydney. Current and seasonal time-zone differences are calculated live in your browser.
Next difference changeCalculated live for the next 12 months.
Temporary difference windowCalculated live for the next 12 months.
Business-hours overlap
Typical working hours are 09:00–17:00 in each city. Green marks the hours when both cities are at work.
Current working-hours overlap is calculated live in your browser.
Frequently asked questions
What is the time difference between Chicago and Sydney?
The current difference is calculated live in your browser and adjusts automatically for daylight saving time.
What time zones do Chicago and Sydney use?
Chicago uses the America/Chicago time zone and Sydney uses the Australia/Sydney time zone.
When is the best time to schedule a call between Chicago and Sydney?
The current working-hours overlap is calculated live in your browser. Use the meeting planner to compare more cities.