KST to SGT Converter
Convert time between Korea Standard Time (KST) and Singapore Standard Time (SGT)
Korea Standard Time (KST)
Singapore Standard Time (SGT)
Time Difference
Singapore Standard Time (SGT) is 0 hours ahead of Korea Standard Time (KST)
Select Date
Select Time
Quick Reference
| KST | SGT |
|---|---|
| 11:00 | 10:00 |
| 13:00 | 12:00 |
| 15:00 | 14:00 |
| 17:00 | 16:00 |
| 19:00 | 18:00 |
| 21:00 | 20:00 |
| 23:00 | 22:00 |
| 01:00 | 00:00 |
| 03:00 | 02:00 |
| 05:00 | 04:00 |
| 07:00 | 06:00 |
| 09:00 | 08:00 |
Top 10 Most Common Time Zones
| Abbreviation | Full Name | UTC Offset | Typical Use |
|---|---|---|---|
| UTC | Coordinated Universal Time | UTC ±0 | Global reference standard (servers, logs, APIs) |
| EST / EDT | Eastern (US) Time | UTC −5 / −4 | New York, Toronto — North American business hub |
| CST / CDT | Central (US) Time | UTC −6 / −5 | Chicago, Dallas — US central business region |
| PST / PDT | Pacific (US) Time | UTC −8 / −7 | San Francisco, Los Angeles — tech industry standard |
| GMT / BST | Greenwich Mean / British Summer Time | UTC 0 / +1 | UK, used globally as a reference with UTC |
| CET / CEST | Central European (Summer) Time | UTC +1 / +2 | Paris, Berlin, Amsterdam — EU business core |
| IST | India Standard Time | UTC +5:30 | India — major IT & outsourcing region |
| CST | China Standard Time | UTC +8 | Beijing, Shanghai — East Asia business hub |
| JST | Japan Standard Time | UTC +9 | Tokyo — finance & tech hub |
| AEST / AEDT | Australian Eastern (Daylight) Time | UTC +10 / +11 | Sydney, Melbourne — APAC regional business |
Why Time Zone Abbreviations Are Ambiguous
Unlike standardized identifiers (like America/New_York or Europe/London from the IANA tz database), abbreviations such as "CST" or "IST" are not globally unique. They can refer to different time zones depending on context — country, region, or even time of year (due to daylight saving time).
Common Ambiguous Time Zone Abbreviations
| Abbrev. | Common Meaning(s) | UTC Offset | Region(s) |
|---|---|---|---|
| CST | Central Standard Time / China Standard Time / Cuba Standard Time | UTC−6 / UTC+8 / UTC−5 | North America, China, Cuba |
| IST | Indian Standard Time / Irish Standard Time / Israel Standard Time | UTC+5:30 / UTC+1 / UTC+2 | India, Ireland, Israel |
| AST | Atlantic Standard Time / Arabia Standard Time | UTC−4 / UTC+3 | Caribbean, Canada, Middle East |
| PST | Pacific Standard Time / Philippine Standard Time | UTC−8 / UTC+8 | North America, Philippines |
| EST | Eastern Standard Time (North America / Australia) | UTC−5 / UTC+10 | North America, Australia |
✅ Best Practice
To avoid ambiguity, always:
- Use IANA tz identifiers — e.g.,
America/New_Yorkinstead of "EST" - Specify UTC offset explicitly — e.g.,
UTC−5when abbreviations must be used - Include the full timezone name — e.g., "Eastern Standard Time (EST)" with UTC offset
About KST to SGT Time Conversion
Converting time between Korea Standard Time (KST) and Singapore Standard Time (SGT) is a daily requirement for east-Asian business connections. KST is UTC+9, while SGT is UTC+8 year-round, putting Singapore 1 hour behind South Korea. Neither side observes daylight saving, so the 1-hour offset is constant 365 days a year — one of the simplest cross-Asia conversions.
This time zone converter uses the IANA timezone database to ensure accurate calculations. South Korea has used KST exclusively since 1961 and the country spans only a single timezone. Whether you're scheduling Seoul-Singapore business meetings, planning travel through East Asia, or coordinating with Singaporean partners from Busan or Incheon, our converter provides reliable results.
Common Use Cases for KST to SGT Conversion
Business & Work
- Scheduling meetings between Seoul, Busan or Incheon offices and Singapore
- Coordinating semiconductor, electronics and shipping partners between Korea and Singapore
- Planning conference calls bridging Korea and Southeast Asia in near-real-time
Personal & Travel
- Planning travel between South Korea and Singapore
- Coordinating with family and friends in Singapore
- Scheduling virtual events spanning Northeast and Southeast Asia
Time Zone Information
Korea Standard Time (KST)
- UTC Offset: UTC+9
- IANA Timezone: Asia/Seoul
- Daylight Saving: No daylight saving time (South Korea last observed DST in 1988)
- Major Cities: Seoul, Busan, Incheon, Daegu, Daejeon, Gwangju, Suwon, Ulsan
- Coverage: Republic of Korea (single nationwide timezone)
Singapore Standard Time (SGT)
- UTC Offset: UTC+8
- IANA Timezone: Asia/Singapore
- Daylight Saving: No daylight saving time (consistent year-round)
- Major Cities: Singapore
- Coverage: Republic of Singapore
Quick Reference: KST to SGT
Remember: SGT is 1 hour behind KST, all year. Neither zone observes daylight saving so the offset never changes.
Frequently Asked Questions
What is the time difference between KST and SGT?
Korea Standard Time (KST) is UTC+9, while Singapore Standard Time (SGT) is UTC+8. SGT is 1 hour behind KST. When it is 12:00 PM in Seoul or Busan, it is 11:00 AM the same day in Singapore.
Does South Korea observe daylight saving?
No. South Korea last observed daylight saving in 1988 (during the Seoul Olympics) and has stayed on KST ever since. Singapore has never observed DST. The KST-SGT gap is a permanent 1 hour, year-round.
How does the time difference change throughout the year?
It does not. Because neither side observes DST, the 1-hour gap is constant 365 days a year. Scheduling does not change with the seasons.
What are the best times for KST-SGT business calls?
Korean working hours (9:00 AM to 6:00 PM KST) overlap almost completely with Singapore working hours (8:00 AM to 5:00 PM SGT). The 1-hour offset is small enough that any standard meeting slot works on both sides.
Which countries or regions use SGT?
Singapore Standard Time is used only in the Republic of Singapore. Neighboring Malaysia uses the same UTC+8 offset under the name MYT, and Western Australia uses AWST also at UTC+8.
Which countries or regions use KST?
KST covers the Republic of Korea (South Korea) as a single nationwide timezone. Major cities include Seoul, Busan, Incheon, Daegu, Daejeon, Gwangju, Suwon and Ulsan. Japan uses the same UTC+9 offset under the name JST.
Pro Tips
- • SGT is 1 hour behind KST — subtract 1 hour from Korean time to get Singapore time.
- • Neither Korea nor Singapore observes DST, so the 1-hour gap is permanent year-round.
- • Korean and Singaporean working hours overlap almost entirely — one of the easiest cross-Asia scheduling pairs.
- • Japan (JST) shares the same UTC+9 offset as Korea, so JST-SGT scheduling is identical to KST-SGT.
- • Watch for Korean public holidays like Seollal (Lunar New Year) and Chuseok (mid-autumn) — Singapore observes a different set of holidays.
- • Use IANA identifiers Asia/Seoul and Asia/Singapore in calendars to stay aligned with regional rules.