MST to AEST Converter
AEDT is 18 hours ahead of MST. 9:00 AM MST = 3:00 AM AEDT (next day).
AEDT is 18 hours ahead of MST at the moment. To convert MST to AEST, add 18 hours to the MST time: 9:00 AM MST = 3:00 AM AEDT (next day).
MST (Mountain Time) is used in Denver, Salt Lake City, Albuquerque, Calgary, Edmonton; Phoenix (Arizona) all year. AEST (Australian Eastern Time) is used in New South Wales, Victoria, Tasmania, ACT; Queensland (Brisbane) all year.
Most of Arizona uses MST all year and does not switch to MDT. Queensland stays on AEST all year. AEST (Australian Eastern Standard Time) is not in force right now: New South Wales is currently on AEDT. This page uses whichever name applies on the date you pick, so the numbers below say AEDT.
MST to AEST time conversion table
MST to AEST on 6 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| MST | AEST | Day |
|---|---|---|
| 12:00 AM MST | 6:00 PM AEDT | — |
| 1:00 AM MST | 7:00 PM AEDT | — |
| 2:00 AM MST | 8:00 PM AEDT | — |
| 3:00 AM MST | 9:00 PM AEDT | — |
| 4:00 AM MST | 10:00 PM AEDT | night |
| 5:00 AM MST | 11:00 PM AEDT | night |
| 6:00 AM MST | 12:00 AM AEDT | next day |
| 7:00 AM MST | 1:00 AM AEDT | next day |
| 8:00 AM MST | 2:00 AM AEDT | next day |
| 9:00 AM MST | 3:00 AM AEDT | next day |
| 10:00 AM MST | 4:00 AM AEDT | next day |
| 11:00 AM MST | 5:00 AM AEDT | next day |
| 12:00 PM MST | 6:00 AM AEDT | next day |
| 1:00 PM MST | 7:00 AM AEDT | next day |
| 2:00 PM MST | 8:00 AM AEDT | next day |
| 3:00 PM MST | 9:00 AM AEDT | work hours |
| 4:00 PM MST | 10:00 AM AEDT | work hours |
| 5:00 PM MST | 11:00 AM AEDT | next day |
| 6:00 PM MST | 12:00 PM AEDT | next day |
| 7:00 PM MST | 1:00 PM AEDT | next day |
| 8:00 PM MST | 2:00 PM AEDT | next day |
| 9:00 PM MST | 3:00 PM AEDT | next day |
| 10:00 PM MST | 4:00 PM AEDT | next day |
| 11:00 PM MST | 5:00 PM AEDT | next day |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert MST to AEST
Add 18 hours to the MST time to get AEST.
Example: 9:00 AM MST = 3:00 AM AEDT (next day).
Across midnight: 10:00 PM MST = 4:00 PM AEDT (next day). The date changes, so always check the day as well as the hour.
Time difference between MST and AEST
The time difference between MST and AEST is not the same all year, because the two sides change for daylight saving time on different dates. In 2026 it works out like this:
- 31 Dec 2025 – 7 Mar 2026: AEST is 18 hours ahead of MST.
- 8 Mar 2026 – 3 Apr 2026: AEST is 17 hours ahead of MST.
- 4 Apr 2026 – 2 Oct 2026: AEST is 16 hours ahead of MST.
- 3 Oct 2026 – 31 Oct 2026: AEST is 17 hours ahead of MST.
- 1 Nov 2026 – 30 Dec 2026: AEST is 18 hours ahead of MST.
MST and AEST during daylight saving time
- MST next changes on 14 Mar 2027: clocks go forward one hour at 01:59 local time, from MST (UTC−7) to MDT (UTC−6).
- AEST next changes on 4 Apr 2027: clocks go back one hour at 02:59 local time, from AEDT (UTC+11) to AEST (UTC+10).
Best time for a meeting between MST and AEST
MST and AEST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 1:00 PM MST, which is 7:00 AM AEDT.
MST to AEST FAQ
What is the time difference between MST and AEST?
Right now AEDT is 18 hours ahead of MST. The gap changes 5 times in 2026 because the two sides switch to daylight saving time on different dates.
What is 9 AM MST in AEST?
9:00 AM MST is 3:00 AM AEDT (next day).
What is 12 PM (noon) MST in AEST?
12:00 PM MST is 6:00 AM AEDT (next day).
Is AEST ahead of or behind MST?
AEDT is 18 hours ahead of MST, so it is later in AEST than in MST.
Does MST change for daylight saving time?
Yes. MST next changes on 14 Mar 2027, when clocks go forward one hour from MST to MDT.
Does AEST change for daylight saving time?
Yes. AEST next changes on 4 Apr 2027, when clocks go back one hour from AEDT to AEST.
What is the best time for a meeting between MST and AEST?
MST and AEST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 1:00 PM MST, which is 7:00 AM AEDT.
Is MT the same as MST?
MST is the winter (standard) name of Mountain Time (MT). From March to November the same clocks are called MDT. This converter always uses the one in force on the date you choose.
Related conversions
Convert AEST to MST
Convert MST to other time zones
Convert other time zones to AEST
Learn more
Updated 6 November 2026. Time zone data: IANA tz database.