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