What is KST in UTC?
Coordinated Universal Time is 9 hours behind
Korea Standard Time is on UTC+9:00 and Coordinated Universal Time is on UTC+0:00 right now. That gap holds all year, because both zones change their clocks together.
- Time in Seoul
- 11:14 am
- Time in the prime meridian
- 2:14 am
- Difference
- −9 h
- Next clock change
- Neither zone
Convert a time
UTC — Coordinated Universal Time
2:00 am
Wed
Daylight saving
Korea Standard Time
Korea Standard Time stays on KST all year, so its offset from UTC never moves.
Coordinated Universal Time
Coordinated Universal Time stays on UTC all year, so its offset from UTC never moves.
KST to UTC conversion table
Every hour of Wednesday, September 23, 2026, converted from Korea Standard Time to Coordinated Universal Time. 9 of the 24 hours fall on a different calendar day in the prime meridian, which is marked.
- 12:00 am KST
- 3:00 pm UTC−1 day
- 1:00 am KST
- 4:00 pm UTC−1 day
- 2:00 am KST
- 5:00 pm UTC−1 day
- 3:00 am KST
- 6:00 pm UTC−1 day
- 4:00 am KST
- 7:00 pm UTC−1 day
- 5:00 am KST
- 8:00 pm UTC−1 day
- 6:00 am KST
- 9:00 pm UTC−1 day
- 7:00 am KST
- 10:00 pm UTC−1 day
- 8:00 am KST
- 11:00 pm UTC−1 day
- 9:00 am KST
- 12:00 am UTC
- 10:00 am KST
- 1:00 am UTC
- 11:00 am KST
- 2:00 am UTC
- 12:00 pm KST
- 3:00 am UTC
- 1:00 pm KST
- 4:00 am UTC
- 2:00 pm KST
- 5:00 am UTC
- 3:00 pm KST
- 6:00 am UTC
- 4:00 pm KST
- 7:00 am UTC
- 5:00 pm KST
- 8:00 am UTC
- 6:00 pm KST
- 9:00 am UTC
- 7:00 pm KST
- 10:00 am UTC
- 8:00 pm KST
- 11:00 am UTC
- 9:00 pm KST
- 12:00 pm UTC
- 10:00 pm KST
- 1:00 pm UTC
- 11:00 pm KST
- 2:00 pm UTC
Scheduling between the two
There is no overlap between a nine-to-six working day in Seoul and one in the prime meridian — the gap is too wide. A call has to sit early or late for one side. Early morning in Seoul is the usual compromise, since that is late afternoon or evening in the prime meridian.
Coordinated Universal Time (UTC) is used in aviation, computing, and science worldwide. UTC never changes for daylight saving.