KST to GMT Time Converter

Convert Korea Standard Time (KST) to Greenwich Mean Time (GMT). Both time zones are shown live below; current offset between them is 8 hours behind.

Seoul · Korea Standard Time
05:55:28
Monday, May 11, 2026
GMT+9 · UTC+09:00
London · Greenwich Mean Time
21:55:28
Sunday, May 10, 2026
GMT+1 · UTC+01:00

Convert a specific time

From: KST (Seoul)
To: GMT (London)
--:--

Daylight Saving status right now

KST (Korea Standard Time)
Observes DST
No
GMT (Greenwich Mean Time)
Observes DST
Yes
In DST right now
Yes
Next fall back
2026-10-25
Offset shift
UTC+01:00 → UTC+00:00

Heads up: GMT observes DST while KST does not. The 8-hour difference shown above will shift by one hour when GMT starts or ends DST.

When can KST and GMT meet?

00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
KST
GMT
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Seoul (KST). Each row shows the local working-hours state in that zone for the same moment in time.
No overlap during strict 9-5 working hours; some flexibility needed.
If both sides are willing to extend to 8am-7pm, the available window is 16:00–18:00 KST (08:00–10:00 GMT).

Hour-by-hour KST to GMT conversion table

KST time (Seoul)GMT time (London)Status
00:00 Mon16:00 SunGMT working
01:00 Mon17:00 SunOff-hours both sides
02:00 Mon18:00 SunOff-hours both sides
03:00 Mon19:00 SunOff-hours both sides
04:00 Mon20:00 SunOff-hours both sides
05:00 Mon21:00 SunOff-hours both sides
06:00 Mon22:00 SunOff-hours both sides
07:00 Mon23:00 SunOff-hours both sides
08:00 Mon00:00 MonOff-hours both sides
09:00 Mon01:00 MonKST working
10:00 Mon02:00 MonKST working
11:00 Mon03:00 MonKST working
12:00 Mon04:00 MonKST working
13:00 Mon05:00 MonKST working
14:00 Mon06:00 MonKST working
15:00 Mon07:00 MonKST working
16:00 Mon08:00 MonKST working
17:00 Mon09:00 MonGMT working
18:00 Mon10:00 MonGMT working
19:00 Mon11:00 MonGMT working
20:00 Mon12:00 MonGMT working
21:00 Mon13:00 MonGMT working
22:00 Mon14:00 MonGMT working
23:00 Mon15:00 MonGMT working

Times computed for today in each zone using the IANA time zone database. The conversion accounts for daylight saving time wherever applicable.

About these time zones

Korea Standard Time (KST)
IANA identifier
Asia/Seoul
Current UTC offset
UTC+09:00
Current abbreviation
GMT+9
Major cities in this zone
SeoulBusan
Greenwich Mean Time (GMT)
IANA identifier
Europe/London
Current UTC offset
UTC+01:00
Current abbreviation
GMT+1
Major cities in this zone
LondonManchesterEdinburghBirmingham

Sun today in Seoul and London

Seoul
Sunrise
05:28
Sunset
19:31
Solar noon
12:29
Daylight
14h 3m
London
Sunrise
05:18
Sunset
20:38
Solar noon
12:58
Daylight
15h 20m

Related converters

GMT to KST (reverse)KST to ESTKST to PSTKST to UTCKST to CETKST to ISTEST to GMTPST to GMTUTC to GMTCET to GMTIST to GMT
Looking for local time? See time in Seoul or time in London.

Frequently asked questions

What is the time difference between KST and GMT right now?+
GMT (Greenwich Mean Time) is currently 8 hours behind KST (Korea Standard Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does KST or GMT observe daylight saving time?+
KST: does not observe daylight saving time. GMT: observes daylight saving time.
When is the best time to schedule a meeting between KST and GMT?+
Standard 9-5 hours do not overlap. Extending to 8am-7pm gives a window of 16:00–18:00 KST (08:00–10:00 GMT).
What time is it in London when it is 12:00 noon in Seoul?+
When it is 12:00 Mon in Seoul (KST), it is 04:00 Mon in London (GMT).
Which IANA time zone identifiers are used for KST and GMT?+
KST maps to "Asia/Seoul" in the IANA database. GMT maps to "Europe/London". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Seoul ahead of or behind London?+
Whether Seoul (KST) is ahead of or behind London (GMT) depends on the current UTC offsets. Right now GMT is 8 hours behind KST. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for KST and GMT?+
KST is UTC+09:00 (GMT+9) and GMT is UTC+01:00 (GMT+1). Both offsets shift by one hour when the corresponding region enters or exits daylight saving time, so the live values on this page are the source of truth.
Can I schedule meetings during business hours for both KST and GMT?+
Not during a strict 9am-5pm window. If both sides flex to 8am-7pm, the available meeting window between KST and GMT is 16:00–18:00 KST.