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Time difference between Perth and Chicago

Chicago is 13 hours behind Perth

Perth, Australia is UTC+8 · Chicago, the United States is UTC−6 — on standard time

The gap is not the same all year

Every converter gives one number for this pair. That number is right for most of the year and wrong for part of it, because Perth does not change its clocks and Chicago goes forward on the second Sunday in March and back on the first Sunday in November.

Perth / Chicago clocksDifferenceHow long
standard / summer13 hours behindabout 34 weeks — most of the year
standard / standard14 hours behindabout 18 weeks

Perth stays put all year while Chicago moves, so the gap changes twice a year from Chicago's side alone. A recurring meeting set in Perth's calendar will drift by an hour without anyone touching it.

When they can both be at their desks

Nine-to-five in Perth and nine-to-five in Chicago do not overlap at all. With 13 hours between them, one side is always outside working hours, and the practical question is which side takes the early start or the late finish rather than when to meet.

Perth to Chicago, hour by hour

PerthChicago
12:00 AM11:00 AM (previous day)
1:00 AM12:00 PM (previous day)
2:00 AM1:00 PM (previous day)
3:00 AM2:00 PM (previous day)
4:00 AM3:00 PM (previous day)
5:00 AM4:00 PM (previous day)
6:00 AM5:00 PM (previous day)
7:00 AM6:00 PM (previous day)
8:00 AM7:00 PM (previous day)
9:00 AM8:00 PM (previous day)
10:00 AM9:00 PM (previous day)
11:00 AM10:00 PM (previous day)
12:00 PM11:00 PM (previous day)
1:00 PM12:00 AM
2:00 PM1:00 AM
3:00 PM2:00 AM
4:00 PM3:00 AM
5:00 PM4:00 AM
6:00 PM5:00 AM
7:00 PM6:00 AM
8:00 PM7:00 AM
9:00 PM8:00 AM
10:00 PM9:00 AM
11:00 PM10:00 AM

On the usual gap of 13 hours.

Frequently asked questions

What is the time difference between Perth and Chicago?

Chicago is 13 hours behind Perth for most of the year. It is not the same all year — there is one other gap, because Perth does not change its clocks and Chicago goes forward on the second Sunday in March and back on the first Sunday in November.

Is Chicago ahead of Perth?

No — Chicago is 13 hours behind. Perth is UTC+8 and Chicago is UTC−6 on standard time.

What time is 9 AM in Perth in Chicago?

8:00 PM (previous day), on the usual gap.

When can Perth and Chicago meet?

Nine-to-five in Perth and nine-to-five in Chicago do not overlap at all. One side has to take the call outside working hours, and with 13 hours between them it is worth deciding in advance which side that is.

Other pairs

Every Perth pair · Every Chicago pair · All city pairs · Time zones by abbreviation