MST to KST Converter
KST is 16 hours ahead of MST. 9:00 AM MST = 1:00 AM KST (next day).
KST is 16 hours ahead of MST at the moment. To convert MST to KST, add 16 hours to the MST time: 9:00 AM MST = 1:00 AM KST (next day).
MST (Mountain Time) is used in Denver, Salt Lake City, Albuquerque, Calgary, Edmonton; Phoenix (Arizona) all year. KST (Korea Time) is used in South Korea.
Most of Arizona uses MST all year and does not switch to MDT.
MST to KST time conversion table
MST to KST on 6 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| MST | KST | Day |
|---|---|---|
| 12:00 AM MST | 4:00 PM KST | — |
| 1:00 AM MST | 5:00 PM KST | — |
| 2:00 AM MST | 6:00 PM KST | — |
| 3:00 AM MST | 7:00 PM KST | — |
| 4:00 AM MST | 8:00 PM KST | — |
| 5:00 AM MST | 9:00 PM KST | — |
| 6:00 AM MST | 10:00 PM KST | night |
| 7:00 AM MST | 11:00 PM KST | night |
| 8:00 AM MST | 12:00 AM KST | next day |
| 9:00 AM MST | 1:00 AM KST | next day |
| 10:00 AM MST | 2:00 AM KST | next day |
| 11:00 AM MST | 3:00 AM KST | next day |
| 12:00 PM MST | 4:00 AM KST | next day |
| 1:00 PM MST | 5:00 AM KST | next day |
| 2:00 PM MST | 6:00 AM KST | next day |
| 3:00 PM MST | 7:00 AM KST | next day |
| 4:00 PM MST | 8:00 AM KST | next day |
| 5:00 PM MST | 9:00 AM KST | next day |
| 6:00 PM MST | 10:00 AM KST | next day |
| 7:00 PM MST | 11:00 AM KST | next day |
| 8:00 PM MST | 12:00 PM KST | next day |
| 9:00 PM MST | 1:00 PM KST | next day |
| 10:00 PM MST | 2:00 PM KST | next day |
| 11:00 PM MST | 3:00 PM KST | next day |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert MST to KST
Add 16 hours to the MST time to get KST.
Example: 9:00 AM MST = 1:00 AM KST (next day).
Across midnight: 10:00 PM MST = 2:00 PM KST (next day). The date changes, so always check the day as well as the hour.
Time difference between MST and KST
The time difference between MST and KST 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: KST is 16 hours ahead of MST.
- 8 Mar 2026 – 31 Oct 2026: KST is 15 hours ahead of MST.
- 1 Nov 2026 – 30 Dec 2026: KST is 16 hours ahead of MST.
MST and KST 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).
- KST does not observe daylight saving time; it stays on UTC+9 all year.
Best time for a meeting between MST and KST
MST and KST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 3:00 PM MST, which is 7:00 AM KST.
MST to KST FAQ
What is the time difference between MST and KST?
Right now KST is 16 hours ahead of MST. The gap changes 3 times in 2026 because the two sides switch to daylight saving time on different dates.
What is 9 AM MST in KST?
9:00 AM MST is 1:00 AM KST (next day).
What is 12 PM (noon) MST in KST?
12:00 PM MST is 4:00 AM KST (next day).
Is KST ahead of or behind MST?
KST is 16 hours ahead of MST, so it is later in KST 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 KST change for daylight saving time?
No. KST stays on the same offset all year, so conversions never shift for daylight saving time.
What is the best time for a meeting between MST and KST?
MST and KST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 3:00 PM MST, which is 7:00 AM KST.
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 KST to MST
Convert MST to other time zones
Convert other time zones to KST
Learn more
Updated 6 November 2026. Time zone data: IANA tz database.