KST to GMT Time Converter
Use this KST to GMT time converter to compare South Korea and United Kingdom time instantly. GMT is 9 hours behind KST, so 9:00 AM KST becomes 12:00 AM GMT and 5:00 PM KST becomes 8:00 AM GMT. The page is useful for business-hours overlap, international calls, remote-team handoffs, webinars, and travel planning, with daylight saving adjustments handled automatically.
KST to GMT Quick Facts
Use this KST to GMT converter to compare South Korea and United Kingdom time, check the 9 hours gap, and confirm the right slot for calls, handoffs, and deadlines. Good overlap starts around 6:00 PM KST / 9:00 AM GMT.
How to Convert KST to GMT
Converting between Korea Standard Time and Greenwich Mean Time means accounting for a 9 hours gap — here's how to do it in under 10 seconds with no sign-up.
Pick the date and time in Korea Standard Time (UTC +9) that you want to convert. Hit "Now" to load the current KST time instantly, or use "+1h" to step forward and compare.
The equivalent Greenwich Mean Time (UTC +0) time appears immediately. Since GMT is 9 hours behind of KST, most daytime conversions stay on the same calendar day.
Click "Copy Time" to grab the GMT result for your calendar or message. Use "+1d" to check how the conversion shifts across dates — helpful for scheduling recurring South Korea–Universal calls.
Why Choose Our KST to GMT Converter
When someone in South Korea suggests 6:00 PM KST, that's 9:00 AM GMT. This converter shows the overlap so both sides agree on one slot — no back-and-forth.
Late-night KST times can land on a different date in GMT because of the 9 hours offset. The converter labels "next day" or "previous day" next to the result so you never send a message a day early or miss a deadline.
Daylight Saving adjustments can widen or narrow the KST–GMT gap by an hour. During transition weeks many people get it wrong. This converter pulls the current UTC offsets automatically, so the result is right even on the changeover day.
Product launches, sports matches, and webinars are often announced in KST. Convert the event time to GMT so you know exactly when to tune in — with a 9 hours difference, a morning event in South Korea hits the evening in Universal.
KST to GMT Time Conversion Chart
Quick-reference conversion table covering every hour of the day at a glance.
Korea Standard Time to Greenwich Mean Time full day schedule
| Korea Standard Time | Greenwich Mean Time |
|---|---|
| 12:00 AM |
3:00 PM
(previous day)
|
| 1:00 AM |
4:00 PM
(previous day)
|
| 2:00 AM |
5:00 PM
(previous day)
|
| 3:00 AM |
6:00 PM
(previous day)
|
| 4:00 AM |
7:00 PM
(previous day)
|
| 5:00 AM |
8:00 PM
(previous day)
|
| 6:00 AM |
9:00 PM
(previous day)
|
| 7:00 AM |
10:00 PM
(previous day)
|
| 8:00 AM |
11:00 PM
(previous day)
|
| 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
|
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Convert Other Time Zones to GMT
Find the time difference from any major zone into Greenwich Mean Time. Use these pages when scheduling with Universal from a different region.