Highlighted rows fall within 09:00–18:00 in both places: 1 shared working hour.
How many hours is CST behind AEST?
As abbreviations, AEST is always 16 hours ahead of CST: CST is UTC−6 and AEST is UTC+10. To convert, add 16 hours.
When the CST to AEST time difference changes
For most of the year AEST is 15 hours ahead of CST. From 1 November to 31 December 2026, AEST is 16 hours ahead of CST instead, because the two places change their clocks on different dates. Meetings booked by the usual gap land an hour off in those weeks.
Dates
AEST vs CST
Length
1 November 2026 to 31 December 2026
16 hours ahead
61 days
1 January 2027 to 13 March 2027
16 hours ahead
72 days
14 March 2027 to 6 November 2027
15 hours ahead
238 days
7 November 2027 to 31 December 2027
16 hours ahead
55 days
Calling hours for CST and AEST
When AEST is 15 hours ahead of CST: no shared 09:00 to 17:00 hours; try 17:00 in CST (08:00 in AEST).
When AEST is 16 hours ahead of CST: no shared 09:00 to 17:00 hours; try 17:00 in CST (09:00 in AEST).
Frequently asked questions about CST and AEST time
How many hours ahead is AEST of CST?
AEST (UTC+10) is 16 hours ahead of CST (UTC−6).
Does the time difference between CST and AEST change?
Yes. It is usually 15 hours ahead, but changes when one side moves its clocks: 16 hours ahead from 1 November to 31 December 2026; 16 hours ahead from 1 January to 13 March 2027.