What is the time difference between UTC and KST?

Korea Standard Time (KST) is 9 hours ahead of Coordinated Universal Time (UTC). UTC uses a UTC offset of UTC, while KST uses UTC+9. For example, when it's 9:00 AM in UTC, it's 6:00 PM in KST. This difference remains constant year-round since neither timezone observes daylight saving time. Use the conversion table above to see the exact time for each hour of the day.

How do I convert UTC to KST?

To convert UTC to KST, add 9 hours to the UTC time. For example, 9:00 AM UTC is 6:00 PM KST, and 5:00 PM UTC is 2:00 AM KST. Since neither timezone observes DST, this conversion stays the same all year. You can also use the interactive converter above for quick, accurate results.

What time is it in KST when it's noon in UTC?

When it's 12:00 PM (noon) in UTC, it's 9:00 PM in KST. This is because KST is 9 hours ahead of UTC. Similarly, when it's 6:00 PM in UTC, it's 3:00 AM in KST. This relationship is constant throughout the year. The color-coded conversion table above shows every hour mapped between both timezones.

How many hours ahead is KST from UTC?

KST is 9 hours ahead of UTC. This means when it's 9:00 AM in UTC, it's 6:00 PM in KST, and when it's midnight in UTC, it's 9:00 AM in KST. This offset is constant throughout the year since neither timezone uses daylight saving time. The conversion table above provides a complete hour-by-hour mapping.

Is KST ahead or behind UTC?

KST is ahead of UTC by 9 hours. Clocks in KST show a later time than UTC, meaning the day starts earlier in KST relative to UTC. For example, when it's morning in UTC, it's already afternoon or evening in KST. This difference stays the same year-round.

Does UTC observe daylight saving time?

No, Coordinated Universal Time does not observe daylight saving time. The UTC offset of UTC remains the same year-round, which simplifies time conversions. Regions using UTC keep their clocks unchanged regardless of the season.

Does KST observe daylight saving time?

No, Korea Standard Time does not observe daylight saving time. The UTC offset of UTC+9 remains the same year-round, making time conversions to KST more predictable. Countries and regions in this timezone keep their clocks unchanged regardless of the season.

What is the best time to call from UTC to KST?

The best time for a call between UTC and KST is during overlapping business hours (9 AM – 5 PM) in both timezones. To reach someone in KST during their work day, call between 12:00 AM and 8:00 AM your UTC time. Avoid calling too early or late, as the 9 hours difference means your evening could be their late night. Check the color-coded conversion table above — green hours indicate business hours in both zones, making it easy to find the ideal time.

Do UTC and KST ever have the same time?

No, UTC and KST are always 9 hours apart and never display the same clock time simultaneously. Neither timezone observes DST, so the difference is constant year-round with no seasonal variation. The 9 hours offset is determined by their fixed positions relative to the Prime Meridian (UTC). You can always rely on this consistent difference when planning across these timezones.

UTC to KST Converter

Convert Coordinated Universal Time to Korea Standard Time. See the hour-by-hour conversion table below.

Timezone Details

UTC

7:39 PM

Thursday, April 2, 2026

UTC (UTC+00:00)

Korea Standard Time

4:39 AM

Friday, April 3, 2026

KST (UTC+09:00)

Difference: +9 hours

KST DST: No

24-Hour Overview

UTC — 24-hour overview

12a12a

3a3a

6a6a

9a9a

10a

11a

12p12p

3p3p

6p6p

9p9p

10p

11p

NightMorningBusinessEvening

KST — 24-hour overview

9a9a

10a

11a

12p12p

3p3p

6p6p

9p9p

10p

11p

12a12a

3a3a

6a6a

NightMorningBusinessEvening

Frequently Asked Questions

Related Conversions

KST to UTC

Cities in These Timezones

KST Cities

Seoul Busan

More Tools

Compare UTC & KST Plan a Meeting (UTC & KST)See on Map

Learn More

How Time Zones Work Understanding DST Timezone Abbreviations

External Resources

Coordinated Universal Time on Wikipedia Korea Standard Time on Wikipedia IANA Time Zone Database