Stockholm is 7 hours behind Seoul for most of the year: when it is 10:00 am in Seoul it is 3:00 am in Stockholm. In offset terms Seoul is on UTC+09:00 and Stockholm is on UTC+01:00 in January, and UTC+09:00 and UTC+02:00 in July. The converter above works from your browser’s own time zone data, so the figure it shows is the one in force today rather than the one that was in force when this page was written.
The difference is not constant, because only one of the two cities observes daylight saving. In 2026, Seoul does not change at all and Stockholm changes on 29 March and 25 October. That leaves 3 distinct periods in the year, and the table below gives the exact dates. It is the short windows that catch people out: a recurring call booked in one city’s clock silently moves in the other’s.
For arranging anything, the number that matters is the overlap. Seoul works 09:00 to 18:00 and Stockholm works 08:00 to 17:00, which leaves 15:00 to 18:00 in Seoul — 08:00 to 11:00 in Stockholm — as the window when both are open. That is 3 hours of shared working time. Both cities work Monday to Friday, so only the clock has to be reconciled.
Two local details worth knowing. Korea keeps UTC+09:00 year-round, the same clock as Japan, so the two are interchangeable for scheduling. The day starts at 08:00 and breaks for fika mid-morning and mid-afternoon, which is when calls tend to be declined.
Write the invitation in both clocks. "10:00 Seoul / 03:00 Stockholm" removes the ambiguity that abbreviations introduce — Seoul alone is read as KST in winter and KST in summer, and calendar software will happily convert one into the other without telling you.
The formula
local Seoul- The time you enter, on the Seoul clock
offset- Each city’s UTC offset at that moment, read live from the IANA time zone database in your browser
−7- The difference in hours that holds for most of 2026: Stockholm is 7 hours behind Seoul
day shift- Whether the converted time falls on the previous, same or next calendar day in Stockholm
How it works, step by step
- Enter a time in Seoul using the 24-hour hour box and the minute box — 15:30 is hour 15, minute 30.
- Your browser reports the UTC offset in force in Seoul and in Stockholm for that moment, so a date near a daylight saving transition is handled correctly rather than with a fixed 7 hour rule.
- The second offset minus the first gives the difference, which is added to the time you entered. A result past midnight is marked as the next or previous day, because that is where most conversion mistakes live.
- The panel also shows the current time in both cities, the date in Stockholm, and whether the two offices are open at the same moment.
Worked examples
09:00 in Seoul
09:00 in Seoul is 02:00 in Stockholm — the middle of the night in Stockholm. In 12-hour terms, 9:00 am against 2:00 am. Only one of the two offices is open at that moment, so it is worth offering rather than assuming.
12:00 in Seoul
12:00 in Seoul is 05:00 in Stockholm — the middle of the night in Stockholm. In 12-hour terms, 12:00 pm against 5:00 am. Only one of the two offices is open at that moment, so it is worth offering rather than assuming.
17:00 in Seoul
17:00 in Seoul is 10:00 in Stockholm — inside Stockholm office hours. In 12-hour terms, 5:00 pm against 10:00 am. Both offices are open at that moment, so it is a slot either side can accept.
The 1 January window, when the usual answer is wrong
Between 1 January and 28 March the difference is -08:00 rather than -07:00, because one city has changed its clocks and the other has not. In that window 10:00 in Seoul is 02:00 in Stockholm, an hour away from where a fixed-offset table would put it.
How to read your score
Frequently asked questions
How many hours behind Seoul is Stockholm?
Stockholm is 7 hours behind Seoul for most of 2026, so 09:00 in Seoul is 02:00 in Stockholm. The difference changes during the daylight saving changeovers, and the table on this page lists every period in the year with its exact dates.
What is 2 pm Seoul time in Stockholm?
7:00 am, before the working day starts in Stockholm. In 24-hour form 14:00 in Seoul is 07:00 in Stockholm, and that is outside working hours in Stockholm.
What is the best time to call between Seoul and Stockholm?
Anywhere between 15:00 and 18:00 Seoul time, which is 08:00 to 11:00 in Stockholm. Both offices are open across that whole window — 3 hours of it. If you want one answer rather than a range, 16:30 in Seoul is the middle of the overlap.
Is Stockholm ahead of or behind Seoul?
Stockholm is behind. Seoul is at UTC+09:00 and Stockholm is at UTC+01:00 in mid-January, and UTC+09:00 and UTC+02:00 in mid-July. The clock moves back going from Seoul to Stockholm, which is why Seoul reaches the end of its working day first.
Do Seoul and Stockholm change their clocks on the same date?
No. In 2026, Seoul does not change its clocks at all, and Stockholm changes on 29 March 2026 and 25 October 2026. That is why the difference between them takes 2 different values across the year rather than one.
What do the abbreviations for Seoul mean?
Seoul is on KST in winter and KST in summer, while Stockholm uses CET and CEST. Abbreviations are the least reliable way to write a time: several are ambiguous between regions, and the summer and winter forms are an hour apart. A UTC offset, or the time given in both cities, cannot be misread.
Does this converter stay correct after the clocks change?
Yes. It does not use a stored number for the difference. Each time you change a value it asks your browser for the UTC offset that Asia/Seoul and Europe/Stockholm are on at that moment, using the IANA time zone database that ships with your operating system, and takes the difference. The tables on this page are computed from the same database for 2026.
Seoul to Stockholm: every hour, every period of 2026, and meeting slots
| Seoul (24h) | Seoul (12h) | Stockholm (24h) | Stockholm (12h) | Status |
|---|---|---|---|---|
| 00:00 | 12:00 am | 17:00 (previous day) | 5:00 pm (previous day) | outside office hours |
| 01:00 | 1:00 am | 18:00 (previous day) | 6:00 pm (previous day) | outside office hours |
| 02:00 | 2:00 am | 19:00 (previous day) | 7:00 pm (previous day) | outside office hours |
| 03:00 | 3:00 am | 20:00 (previous day) | 8:00 pm (previous day) | outside office hours |
| 04:00 | 4:00 am | 21:00 (previous day) | 9:00 pm (previous day) | outside office hours |
| 05:00 | 5:00 am | 22:00 (previous day) | 10:00 pm (previous day) | outside office hours |
| 06:00 | 6:00 am | 23:00 (previous day) | 11:00 pm (previous day) | outside office hours |
| 07:00 | 7:00 am | 00:00 | 12:00 am | outside office hours |
| 08:00 | 8:00 am | 01:00 | 1:00 am | outside office hours |
| 09:00 | 9:00 am | 02:00 | 2:00 am | office hours in Seoul |
| 10:00 | 10:00 am | 03:00 | 3:00 am | office hours in Seoul |
| 11:00 | 11:00 am | 04:00 | 4:00 am | office hours in Seoul |
| 12:00 | 12:00 pm | 05:00 | 5:00 am | office hours in Seoul |
| 13:00 | 1:00 pm | 06:00 | 6:00 am | office hours in Seoul |
| 14:00 | 2:00 pm | 07:00 | 7:00 am | office hours in Seoul |
| 15:00 | 3:00 pm | 08:00 | 8:00 am | office hours in both |
| 16:00 | 4:00 pm | 09:00 | 9:00 am | office hours in both |
| 17:00 | 5:00 pm | 10:00 | 10:00 am | office hours in both |
| 18:00 | 6:00 pm | 11:00 | 11:00 am | office hours in Stockholm |
| 19:00 | 7:00 pm | 12:00 | 12:00 pm | office hours in Stockholm |
| 20:00 | 8:00 pm | 13:00 | 1:00 pm | office hours in Stockholm |
| 21:00 | 9:00 pm | 14:00 | 2:00 pm | office hours in Stockholm |
| 22:00 | 10:00 pm | 15:00 | 3:00 pm | office hours in Stockholm |
| 23:00 | 11:00 pm | 16:00 | 4:00 pm | office hours in Stockholm |
Computed at a difference of -7 hours, which is the one that holds for most of 2026. During the transition windows in the table below, shift the right-hand columns by an hour.
| Period | Length | Seoul offset | Stockholm offset | Difference | Abbreviations |
|---|---|---|---|---|---|
| 01 Jan to 28 Mar | 87 days | UTC+09:00 | UTC+01:00 | -8:00 | KST / CET |
| 29 Mar to 24 Oct | 210 days | UTC+09:00 | UTC+02:00 | -7:00 | KST / CEST |
| 25 Oct to 31 Dec | 68 days | UTC+09:00 | UTC+01:00 | -8:00 | KST / CET |
Every row is read from the IANA time zone database. Short periods appear where one city has changed its clocks and the other has not yet done so.
| Seoul | 12-hour | Stockholm | Verdict |
|---|---|---|---|
| 06:00 | 6:00 am | 23:00 (previous day) | Outside both |
| 06:30 | 6:30 am | 23:30 (previous day) | Outside both |
| 07:00 | 7:00 am | 00:00 | Outside both |
| 07:30 | 7:30 am | 00:30 | Outside both |
| 08:00 | 8:00 am | 01:00 | Outside both |
| 08:30 | 8:30 am | 01:30 | Outside both |
| 09:00 | 9:00 am | 02:00 | Too early in Stockholm |
| 09:30 | 9:30 am | 02:30 | Too early in Stockholm |
| 10:00 | 10:00 am | 03:00 | Too early in Stockholm |
| 10:30 | 10:30 am | 03:30 | Too early in Stockholm |
| 11:00 | 11:00 am | 04:00 | Too early in Stockholm |
| 11:30 | 11:30 am | 04:30 | Too early in Stockholm |
| 12:00 | 12:00 pm | 05:00 | Too early in Stockholm |
| 12:30 | 12:30 pm | 05:30 | Too early in Stockholm |
| 13:00 | 1:00 pm | 06:00 | Too early in Stockholm |
| 13:30 | 1:30 pm | 06:30 | Too early in Stockholm |
| 14:00 | 2:00 pm | 07:00 | Too early in Stockholm |
| 14:30 | 2:30 pm | 07:30 | Too early in Stockholm |
| 15:00 | 3:00 pm | 08:00 | Good — both offices open |
| 15:30 | 3:30 pm | 08:30 | Good — both offices open |
| 16:00 | 4:00 pm | 09:00 | Good — both offices open |
| 16:30 | 4:30 pm | 09:30 | Good — both offices open |
| 17:00 | 5:00 pm | 10:00 | Good — both offices open |
| 17:30 | 5:30 pm | 10:30 | Good — both offices open |
| 18:00 | 6:00 pm | 11:00 | After hours in Seoul |
| 18:30 | 6:30 pm | 11:30 | After hours in Seoul |
| 19:00 | 7:00 pm | 12:00 | After hours in Seoul |
| 19:30 | 7:30 pm | 12:30 | After hours in Seoul |
| 20:00 | 8:00 pm | 13:00 | After hours in Seoul |
| 20:30 | 8:30 pm | 13:30 | After hours in Seoul |
| 21:00 | 9:00 pm | 14:00 | After hours in Seoul |
| 21:30 | 9:30 pm | 14:30 | After hours in Seoul |
Office hours taken as 09:00–18:00 in Seoul and 08:00–17:00 in Stockholm, which are the customary hours in each city rather than a generic nine to five.