KST to IST Converter
Convert time between Korea Standard Time (KST) and India Standard Time (IST)
Korea Standard Time (KST)
India Standard Time (IST)
Time Difference
India Standard Time (IST) is 0 hours ahead of Korea Standard Time (KST)
Select Date
Select Time
Quick Reference
| KST | IST |
|---|---|
| 11:00 | 07:30 |
| 13:00 | 09:30 |
| 15:00 | 11:30 |
| 17:00 | 13:30 |
| 19:00 | 15:30 |
| 21:00 | 17:30 |
| 23:00 | 19:30 |
| 01:00 | 21:30 |
| 03:00 | 23:30 |
| 05:00 | 01:30 |
| 07:00 | 03:30 |
| 09:00 | 05:30 |
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 IST Time Conversion
Converting time from Korea Standard Time (KST) to India Standard Time (IST) is essential for South Korea-India coordination. KST is UTC+9 and IST is UTC+5:30, making IST 3.5 hours behind KST. Neither region observes daylight saving time, so this 3.5-hour gap is constant year-round.
This moderate, stable offset supports good business-hour overlap — Korean afternoons line up with the bulk of the Indian workday. Whether you are coordinating with Seoul, Busan, Mumbai, or Bangalore teams on tech, manufacturing, or trade projects, our IANA-based converter delivers reliable results every day of the year.
Common Use Cases for KST to IST Conversion
Business & Work
- Scheduling calls between Korean teams and Bangalore, Mumbai, or Delhi offices
- Coordinating tech, semiconductor, or manufacturing projects between South Korea and India
- Planning daily standups that fit both Korean and Indian working hours
Personal & Travel
- Keeping in touch with family or friends living in India
- Planning travel from South Korea to Delhi, Mumbai, or Bangalore
- Scheduling online study, K-content watch parties, or virtual events across both regions
Time Zone Information
Korea Standard Time (KST)
- UTC Offset: UTC+9 (no DST observed)
- IANA Timezone: Asia/Seoul
- Daylight Saving: South Korea does not observe daylight saving time
- Major Cities: Seoul, Busan, Incheon, Daegu, Daejeon, Gwangju, Jeju
- Coverage: All of South Korea
India Standard Time (IST)
- UTC Offset: UTC+5:30
- IANA Timezone: Asia/Kolkata
- Daylight Saving: No daylight saving time (consistent year-round)
- Major Cities: New Delhi, Mumbai, Bangalore, Hyderabad, Chennai, Kolkata
- Coverage: Entire India (single timezone covering the nation)
Quick Reference: KST to IST
Remember: IST is always 3.5 hours behind KST. Neither region observes daylight saving time, so this offset is constant.
Frequently Asked Questions
What is the time difference between KST and IST?
Korea Standard Time (KST) is UTC+9, while India Standard Time (IST) is UTC+5:30. IST is 3.5 hours behind KST, so when it is 12:00 PM in Seoul, it is 8:30 AM in Delhi.
Does the KST to IST time difference change throughout the year?
No. Neither South Korea nor India observes daylight saving time. KST stays at UTC+9 and IST stays at UTC+5:30 every day of the year, so the 3.5-hour gap is constant.
How do half-hour offsets affect this conversion?
IST sits on a half-hour offset (UTC+5:30) while KST does not, so conversions land on :30 minutes (e.g. 12:00 PM KST → 8:30 AM IST).
What are the best times to schedule KST to IST business calls?
Overlap is good. 1–5 PM KST is 9:30 AM–1:30 PM IST — strong for live calls covering the Korean afternoon and the start of the Indian workday. Earlier KST hours catch the very early Indian morning, which is less practical.
Which regions and cities use IST?
IST (UTC+5:30) covers all of India under a single timezone. Major cities include New Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Kolkata. India does not observe daylight saving time.
Which regions use KST?
KST (UTC+9) is used by all of South Korea. Major cities include Seoul, Busan, Incheon, Daegu, Daejeon, Gwangju, and Jeju. South Korea does not observe daylight saving time.
Pro Tips
- • IST is always 3.5 hours behind KST — subtract 3:30 from Korean time.
- • Neither region observes DST, so this conversion is constant year-round.
- • Korean afternoons (1–5 PM KST) line up with Indian mornings (9:30 AM–1:30 PM IST) — a strong window for live collaboration.
- • Korean tech, semiconductor, and manufacturing firms work closely with Indian partners; this small offset helps daily standups feel natural.
- • Indian public holidays (Diwali, Holi, regional festivals) can shift business activity; plan around them when scheduling.
- • Direct flights between Seoul and major Indian cities take roughly 8–9 hours and produce moderate jet lag.