Seoul ChicagoKST to CST Time Converter
Seoul (KST, UTC+9) is currently 15 hours ahead of Chicago (CST, UTC−6). Compare live clocks, convert any hour, and find times to meet.
Quick answer
When it's in Seoul, it's the previous day in Chicago.
Seoul (KST) runs 15 hours ahead of Chicago (CST). A 9-to-5 workday on one side lands in the other side's evening or night, so the two cities share almost no normal working hours — edge-of-day calls are the trick.
- Time difference
- −15h 00m
- KST
- UTC+9
- CST
- UTC−6
- Best call window
- Outside 9–6
KST to CST conversion table
The next 12 hours in KST and the matching local time in CST. The current hour is highlighted; drag the converter's slider and the table follows.
| KST | CST |
|---|---|
| NOW Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Best time to meet between KST & CST
Working hours are 9am–6pm in each city. The bright band is where they overlap — when both sides are at their desks.
Daylight saving shifts this gap by up to 1 hour
The difference between KST and CST swings between 15 and 14 hours across the year as each side starts or ends daylight saving. Regions on CST switch to CDT (UTC−5) during daylight saving time. This page always shows the live, DST-aware difference.
Related time zone conversions
Jump straight to another pair — every combination is a live tool, not an article.
From KST
To CST
One source of truth — for you and your AI
This page exposes the same answer as structured data, so when you ask an assistant "what's 9am KST time in CST?", it can cite the exact, DST-aware result — not a stale blog post.
- Schema.org JSON-LD on every converter page
- A machine-readable facts island with IANA zones and every possible offset
- Live times in <time datetime> elements with explicit UTC offsets
{
"pair": "KST → CST",
"url": "https://worldclock.pro/en/convert/kst-to-cst",
"from": {
"name": "KST",
"type": "timezone",
"abbreviation": "KST",
"daylightAbbreviation": null,
"iana": "Asia/Seoul",
"standardUtcOffset": "+09:00",
"daylightUtcOffset": null,
"referenceCity": "Seoul"
},
"to": {
"name": "CST",
"type": "timezone",
"abbreviation": "CST",
"daylightAbbreviation": "CDT",
"iana": "America/Chicago",
"standardUtcOffset": "-06:00",
"daylightUtcOffset": "-05:00",
"referenceCity": "Chicago"
},
"currentDifferenceMinutes": -900,
"possibleDifferencesMinutes": [
-900,
-840
],
"note": "Between the regions that use these zones the difference is 15 and 14 hours across the year, depending on daylight saving on each side. The clocks on this page show the named zones themselves, which are fixed."
}
Frequently asked questions
What is the time difference between KST and CST?
KST is currently 15 hours ahead of CST. KST is on KST (UTC+9) and CST is on CST (UTC−6). The difference can change when either side starts or ends daylight saving time.
Is CST ahead of or behind KST?
CST is currently 15 hours behind KST.
When it is 9:00 AM in KST, what time is it in CST?
When it is 9:00 AM on a Monday in KST, it is 6:00 PM the previous day in CST.
Do KST and CST observe daylight saving time?
KST does not observe daylight saving time. Regions on CST switch to CDT (UTC−5) during daylight saving time.
How do I convert KST time to CST time?
Subtract 15 hours from any time in KST to get the time in CST. This page's converter and 24-hour table do it automatically and stay correct through daylight-saving changes.
More world clock & time zone apps
From the team behind worldclock.pro — global scheduling on iPhone & iPad, a Mac menu-bar clock, and precision Zulu/UTC for aviation, military, and HAM radio.
World Clock Master
Global time zone scheduling for international teams, travelers, and professionals who coordinate across cities and continents.
View app
World Clock Pro
The same powerful time zone converter, meeting scheduler, and world clock — living in your Mac's menu bar.
View app