KST to UTC Converter

Category: Time Zone Converters

- July 07, 2025

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Korea Standard Time (KST)

UTC+9 • Seoul, Busan, Incheon

Conversion Settings

Configure your timezone conversion preferences

Auto Convert

Show UTC Offset

Show Seconds

Show Date

Coordinated Universal Time (UTC)

UTC+0 • London, Dublin, Reykjavik

--:--:--

Select a time to convert

Time Difference: --

UTC Offset (KST): +9

UTC Offset (UTC): +0

DST Status: --

KST Time: --

UTC Time: --

Time Format:

Current KST: --:--:--

Current UTC: --:--:--

🌏 KST is UTC+9 and does not observe daylight saving time. UTC is the global time standard and never changes.

KST to UTC Conversion Guide

What is KST to UTC Conversion?

KST to UTC conversion helps you translate time between Korea Standard Time and Coordinated Universal Time. KST is UTC+9 year-round and does not observe daylight saving time. UTC is the world time standard and remains constant globally. The time difference is always 9 hours, with KST being ahead of UTC.

Time Zone Information

Korea Standard Time (KST): Used in South Korea and North Korea. Always UTC+9 throughout the year with no daylight saving time changes.

Coordinated Universal Time (UTC): The world time standard, successor to GMT. Used globally for coordination and synchronization. Always UTC+0.

Time Difference: KST is consistently 9 hours ahead of UTC throughout the entire year.

Daylight Saving Time Impact

No DST in Korea: South Korea does not observe daylight saving time and maintains UTC+9 year-round

UTC Consistency: UTC never changes and serves as the universal reference time for all timezones

Constant Difference: The 9-hour difference remains fixed throughout the entire year

Common Conversion Examples

Business Hours

KST 9:00 AM → UTC 12:00 AM

KST 6:00 PM → UTC 9:00 AM

Standard business day conversion

International Meetings

KST 10:00 AM → UTC 1:00 AM

KST 3:00 PM → UTC 6:00 AM

Global coordination times

Server Timestamps

KST 12:00 AM → UTC 3:00 PM (previous day)

KST 11:59 PM → UTC 2:59 PM

Midnight boundary handling

Aviation & Travel

KST 6:00 AM → UTC 9:00 PM (previous day)

KST 8:00 PM → UTC 11:00 AM

Flight scheduling standard

Conversion Tips & Best Practices

• KST does not change throughout the year - no daylight saving time adjustments

• UTC is the global standard for timestamps in computing, aviation, and scientific applications

• Always subtract 9 hours from KST to get UTC time

• UTC dates may change when converting early morning KST times

• KST is shared with Japan Standard Time (JST) - both are UTC+9

• UTC coordinates global operations across all time zones without confusion

KST to UTC Time Converter

Here’s a quick overview of how Korea Standard Time (KST) lines up with Coordinated Universal Time (UTC). The table below shows countries that follow each time standard. If you're planning calls, managing systems, or just keeping your head straight about timezones, this visual split helps you match up the zones easily.

KST (UTC+9)	UTC (UTC+0)
🇰🇷 South Korea 🇰🇵 North Korea 🇯🇵 Japan 🇮🇩 Indonesia (Maluku & Papua regions) 🇷🇺 Russia (Yakutsk Time) 🇹🇱 Timor-Leste 🇵🇬 Papua New Guinea (Bougainville region)	🇬🇧 United Kingdom 🇮🇪 Ireland 🇮🇸 Iceland 🇬🇭 Ghana 🇬🇲 Gambia 🇸🇳 Senegal 🇲🇷 Mauritania 🇹🇬 Togo 🇲🇱 Mali 🇧🇫 Burkina Faso 🇬🇳 Guinea 🇸🇱 Sierra Leone 🇱🇷 Liberia 🇨🇮 Côte d'Ivoire 🇬🇼 Guinea-Bissau 🇸🇭 Saint Helena 🇸🇵 Spain (Canary Islands - winter only) 🇵🇹 Portugal (Azores - winter only)

KST (UTC+9)

UTC (UTC+0)

🇰🇷 South Korea

🇰🇵 North Korea

🇯🇵 Japan

🇮🇩 Indonesia (Maluku & Papua regions)

🇷🇺 Russia (Yakutsk Time)

🇹🇱 Timor-Leste

🇵🇬 Papua New Guinea (Bougainville region)

🇬🇧 United Kingdom

🇮🇪 Ireland

🇮🇸 Iceland

🇬🇭 Ghana

🇬🇲 Gambia

🇸🇳 Senegal

🇲🇷 Mauritania

🇹🇬 Togo

🇲🇱 Mali

🇧🇫 Burkina Faso

🇬🇳 Guinea

🇸🇱 Sierra Leone

🇱🇷 Liberia

🇨🇮 Côte d'Ivoire

🇬🇼 Guinea-Bissau

🇸🇭 Saint Helena

🇸🇵 Spain (Canary Islands - winter only)

🇵🇹 Portugal (Azores - winter only)

Why you’ll appreciate this converter

If you’ve ever tried to schedule a call between Seoul and London, you already know how easy it is to mess up the time. This tool removes the guesswork. Whether you’re handling remote teams, deploying code to servers across zones, or planning travel, it lets you convert between Korea Standard Time and UTC without lifting more than a finger.

How it works and what it does for you

The KST to UTC Time Converter is a flexible and live calculator that shows you what time it is in UTC when you input a specific time in KST, or vice versa. It uses your selected date and time, then applies the fixed 9-hour difference between these two zones. It also tracks live current time in both zones so you always know what’s happening right now.

You’re in control

The converter gives you several Tools to fine-tune your experience:

Auto Convert: Automatically updates results when you change the time or date.
Show UTC Offset: Toggle the display of offset values like +09:00 or +00:00.
Show Seconds: Add or remove seconds from the display for precision.
Show Date: Include the full date in your result, or keep it time-only for simplicity.

Step-by-step: From your time to theirs

Select a date and time from the input fields.
Choose whether you’re starting from KST or UTC using the dropdown.
Click Convert Time or let Auto Convert do it for you.
Your result appears instantly in the opposite timezone, with details like offset and formatted timestamps.

You can also hit Now to instantly load the current time, or tap Swap to flip the direction of conversion. And if you want to start fresh, the Reset button brings everything back to default.

Built-in smarts to help you avoid common mistakes

The converter is smart about daylight saving time by not allowing it to confuse the math. Since KST never changes and UTC is constant, you’re always looking at a simple 9-hour difference. But if you input a late-night KST time, don’t be surprised to see the UTC date shift to the previous day. The tool handles that cleanly, showing both time and date so you’re not left guessing.

You can switch between 12-hour and 24-hour formats at any time using the format toggle at the bottom. This changes how the result appears but doesn’t affect the calculation.

One click makes a world of difference

Imagine you’re in South Korea, trying to coordinate with a server located on UTC time, like many cloud platforms use. You’re planning a deployment at 2:00 AM KST, which lines up with 5:00 PM UTC the previous day. Instead of doing the mental math or relying on error-prone web searches, you just type it in, hit convert, and get instant clarity. No confusion, no surprises.

Time moves fast, but your planning doesn’t have to

This KST to UTC Time Converter was built to make one of the most frustrating parts of global coordination a little smoother. Whether you're working, traveling, or just checking in with someone far away, this tool helps keep your time aligned without slowing you down.