MST to AEST Time Converter
Australian Eastern Standard Time (AEST) is currently 17 hours ahead of Mountain Standard Time (MST). MST is UTC-7 and AEST is UTC+10. The table below converts every hour of the day between the two, and the call planner shows where working hours line up.
Best Time for a Call
Both sides are inside 9:00 AM to 5:00 PM office hours between 9:00 AM and 5:00 PM in MST, which is 9:00 AM to 5:00 PM in AEST.
Comparing more than two places? The Overlap Zones tool shows working hours for several cities on one grid.
Hour by Hour: MST to AEST
Rows marked office hours fall between 9:00 AM and 5:00 PM in both places. For a specific date, use the interactive converter.
Does the Difference Change During the Year?
MST and AEST are fixed offsets, so the difference between them never changes.
MST is UTC-7. Most of the Mountain region switches to MDT (UTC-6) in summer, but Arizona stays on MST year round.
AEST is UTC+10. Sydney and Melbourne switch to AEDT (UTC+11) from October to April, while Brisbane stays on AEST year round.
Frequently Asked Questions
How many hours ahead is AEST compared to MST?
AEST is currently 17 hours ahead of MST. MST and AEST are fixed offsets, so the difference between them never changes.
What time is 9:00 AM in MST in AEST?
9:00 AM in MST is 2:00 AM in AEST on the next day.
What is the best time for a call between MST and AEST?
Both sides are inside 9:00 AM to 5:00 PM office hours between 9:00 AM and 5:00 PM in MST, which is 9:00 AM to 5:00 PM in AEST.