KST to GMT Converter
GMT is 9 hours behind KST
KST to GMT Conversion Table
Green rows indicate standard business hours (9 AM – 5 PM) in GMT
| KST | GMT |
|---|---|
| 12:00 AM | 3:00 PM -1d |
| 1:00 AM | 4:00 PM -1d |
| 2:00 AM | 5:00 PM -1d |
| 3:00 AM | 6:00 PM -1d |
| 4:00 AM | 7:00 PM -1d |
| 5:00 AM | 8:00 PM -1d |
| 6:00 AM | 9:00 PM -1d |
| 7:00 AM | 10:00 PM -1d |
| 8:00 AM | 11:00 PM -1d |
| 9:00 AM | 12:00 AM |
| 10:00 AM | 1:00 AM |
| 11:00 AM | 2:00 AM |
| 12:00 PM | 3:00 AM |
| 1:00 PM | 4:00 AM |
| 2:00 PM | 5:00 AM |
| 3:00 PM | 6:00 AM |
| 4:00 PM | 7:00 AM |
| 5:00 PM | 8:00 AM |
| 6:00 PM | 9:00 AM |
| 7:00 PM | 10:00 AM |
| 8:00 PM | 11:00 AM |
| 9:00 PM | 12:00 PM |
| 10:00 PM | 1:00 PM |
| 11:00 PM | 2:00 PM |
Converting Korea Standard Time to Greenwich Mean Time
Korea Standard Time (KST) and Greenwich Mean Time (GMT) are separated by a 9 hours time difference. GMT is 9 hours behind KST. KST is UTC+9, used in South Korea, while GMT is UTC+0, used in United Kingdom, Ireland, Portugal.
When converting from KST to GMT, the key reference points to remember are: 9:00 AM KST equals 12:00 AM GMT, 12:00 PM noon KST equals 3:00 AM GMT, and 5:00 PM KST equals 8:00 AM GMT. The conversion table above shows every hour of the day mapped between these two time zones.
Scheduling Across KST and GMT
For professionals scheduling meetings between KST and GMT, finding overlapping business hours is essential. Standard business hours are typically 9:00 AM to 5:00 PM in each time zone. Given the 9 hours difference, the window of overlap may be limited, making early morning or late evening calls necessary for one party. Use the highlighted working hours in the conversion table above to quickly identify suitable meeting times.
Daylight Saving Time Considerations
KST does not observe Daylight Saving Time, maintaining UTC+9 year-round. GMT observes DST, switching to BST (UTC+1). During DST transitions, the time difference between these zones may temporarily change by 1 hour. Always verify the current offset during spring and fall transition periods.