What is KST in GMT?
Greenwich Mean Time is 9 hours behind
Korea Standard Time is on UTC+9:00 and Greenwich Mean 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 Greenwich
- 2:14 am
- Difference
- −9 h
- Next clock change
- Neither zone
Convert a time
GMT — Greenwich Mean 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.
Greenwich Mean Time
Greenwich Mean Time stays on GMT all year, so its offset from UTC never moves.
KST to GMT conversion table
Every hour of Wednesday, September 23, 2026, converted from Korea Standard Time to Greenwich Mean Time. 9 of the 24 hours fall on a different calendar day in Greenwich, which is marked.
- 12:00 am KST
- 3:00 pm GMT−1 day
- 1:00 am KST
- 4:00 pm GMT−1 day
- 2:00 am KST
- 5:00 pm GMT−1 day
- 3:00 am KST
- 6:00 pm GMT−1 day
- 4:00 am KST
- 7:00 pm GMT−1 day
- 5:00 am KST
- 8:00 pm GMT−1 day
- 6:00 am KST
- 9:00 pm GMT−1 day
- 7:00 am KST
- 10:00 pm GMT−1 day
- 8:00 am KST
- 11:00 pm GMT−1 day
- 9:00 am KST
- 12:00 am GMT
- 10:00 am KST
- 1:00 am GMT
- 11:00 am KST
- 2:00 am GMT
- 12:00 pm KST
- 3:00 am GMT
- 1:00 pm KST
- 4:00 am GMT
- 2:00 pm KST
- 5:00 am GMT
- 3:00 pm KST
- 6:00 am GMT
- 4:00 pm KST
- 7:00 am GMT
- 5:00 pm KST
- 8:00 am GMT
- 6:00 pm KST
- 9:00 am GMT
- 7:00 pm KST
- 10:00 am GMT
- 8:00 pm KST
- 11:00 am GMT
- 9:00 pm KST
- 12:00 pm GMT
- 10:00 pm KST
- 1:00 pm GMT
- 11:00 pm KST
- 2:00 pm GMT
Scheduling between the two
There is no overlap between a nine-to-six working day in Seoul and one in Greenwich — 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 Greenwich.
Greenwich Mean Time (GMT) is used in as a fixed UTC+0 offset. Note that the UK itself leaves GMT every summer — see British Time below.