AEST to MST Time Converter
Mountain Standard Time (MST) is currently 17 hours behind Australian Eastern Standard Time (AEST). AEST is UTC+10 and MST is UTC-7. 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 AEST, which is 9:00 AM to 5:00 PM in MST.
Comparing more than two places? The Overlap Zones tool shows working hours for several cities on one grid.
Hour by Hour: AEST to MST
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?
AEST and MST are fixed offsets, so the difference between them never changes.
AEST is UTC+10. Sydney and Melbourne switch to AEDT (UTC+11) from October to April, while Brisbane stays on AEST year round.
MST is UTC-7. Most of the Mountain region switches to MDT (UTC-6) in summer, but Arizona stays on MST year round.
Frequently Asked Questions
How many hours behind is MST compared to AEST?
MST is currently 17 hours behind AEST. AEST and MST are fixed offsets, so the difference between them never changes.
What time is 9:00 AM in AEST in MST?
9:00 AM in AEST is 4:00 PM in MST on the previous day.
What is the best time for a call between AEST and MST?
Both sides are inside 9:00 AM to 5:00 PM office hours between 9:00 AM and 5:00 PM in AEST, which is 9:00 AM to 5:00 PM in MST.