Convert IST to KST
Compare India Standard Time and Korea Standard Time with a live conversion table, meeting planner, and calendar export tools.
How Conversion Works
Convert India Standard Time (UTC+5:30) to Korea Standard Time (UTC+9) using the fixed 3 hours 30 minutes difference. Neither IST nor KST observes daylight saving time, so conversions stay consistent year-round.
Hour-by-Hour Table
Use the visual hour-by-hour grid to compare IST and KST across the day and spot overlapping working hours quickly. Export selected times with ICS download or send them to Google Calendar and Gmail.
Schedule Meetings Easily
Find practical meeting times between India Standard Time and Korea Standard Time with side-by-side scheduling tools. Time calculations update automatically from the IANA timezone database to ensure accurate offsets and historical rules.
How to Convert IST to KST
IST (India Standard Time, UTC+5:30) converts to KST (Korea Standard Time, UTC+9) with Korea Standard Time 3 hours 30 minutes ahead of India Standard Time. This page is useful when you need to line up work hours between India and South Korea or North Korea, such as scheduling a vendor call, planning a product handoff, or confirming support coverage across Asian business hours.
Looking for Irish Standard Time? See /time-converter/ist-ireland-time-zone.
Looking for Israel Standard Time? See /time-converter/ist-israel-time-zone.
Open the IST to KST converter: Go to
https://www.xconvert.com/time-converter/ist-to-kst-converterto load a comparison grid with India Standard Time and Korea Standard Time already aligned on a 24-hour timeline. This is the fastest way to compare a workday in India with business hours in Seoul or Pyongyang when planning engineering standups, supplier updates, or regional operations calls.Add comparison cities if your schedule involves more teams: Click + Add City and search for cities that matter to your workflow, such as Mumbai for India-facing operations or Seoul for South Korea-based meetings, then add another city if you need a broader Asia schedule view. This is especially useful for companies coordinating software development, electronics manufacturing, customer support, or logistics across Indian and Korean teams.
Drag to select the meeting window on the grid: Click Select, then drag across the colored timeline in the India Standard Time row to highlight a range in purple, such as 9:00 to 12:00 IST, and compare it directly against the Korea Standard Time row. That visual selection shows the exact overlap using known conversions: 9:00 IST = 12:30 KST and 12:00 IST = 15:30 KST, which helps confirm that a late-morning India meeting lands in the early-to-mid afternoon in Korea.
Resize, move, and export the selected time: Drag the left or right handles to fine-tune the range, or drag the center of the purple block to shift the whole meeting later in the day, then use the export options for ICS download, Google Calendar, Gmail, Copy to clipboard, or Share link. These options are practical when you need to send a confirmed slot to a distributed team so everyone receives the meeting in local time without manually translating India Standard Time to Korea Standard Time.
Understanding the IST to KST Time Difference
India Standard Time is UTC+5:30, while Korea Standard Time is UTC+9. KST is 3 hours 30 minutes ahead of IST, which means a morning schedule in India appears as a later midday or evening schedule in Korea.
The fixed conversion examples make the difference easy to apply in daily planning. 9:00 IST = 12:30 KST, 12:00 IST = 15:30 KST, 15:00 IST = 18:30 KST, and 18:00 IST = 21:30 KST. For business users, that means an India lunchtime discussion reaches Korea in the mid-afternoon, while a late India work session pushes into the Korean evening.
India Standard Time does not observe DST, and Korea Standard Time does not observe DST. Because neither time zone changes clocks seasonally, the IST to KST difference does not change in any month of the year, so the 3 hours 30 minutes gap stays the same in January, June, October, and December.
This consistency is useful for recurring operations. If an India-based team sets a weekly call for 12:00 IST, the Korea-based participants can treat it as 15:30 KST all year, without needing to adjust for spring or autumn clock changes.
Best Times for Calls and Meetings Between IST and KST
India Standard Time and Korea Standard Time are close enough for same-day collaboration, but the 3 hours 30 minutes gap still matters when teams want to stay inside normal office hours. A practical overlap is the India morning through afternoon period, which maps to Korea midday through evening.
Using the known examples, 9:00 IST = 12:30 KST and 12:00 IST = 15:30 KST, making that block a strong option for project updates, account reviews, and procurement calls. It gives India teams a standard morning-to-noon slot while Korean teams join after lunch, which often works well for product, manufacturing, and partner coordination.
A later overlap also exists for urgent work, but it becomes less comfortable for Korea-based attendees. 15:00 IST = 18:30 KST and 18:00 IST = 21:30 KST, so an India afternoon or early evening meeting lands in the Korean evening, which may suit deadline-driven releases or end-of-day issue escalations but is less ideal for recurring meetings.
For routine weekly meetings, the most balanced approach is usually to anchor the session earlier in India’s day. That keeps Korea participants out of late-night hours while still allowing both sides to review deliverables, approve next steps, and hand off tasks within the same calendar day.
Frequently Asked Questions
What is the time difference between IST and KST?
India Standard Time is 3 hours 30 minutes behind Korea Standard Time, and Korea Standard Time is 3 hours 30 minutes ahead of India Standard Time. In practical terms, when teams in India begin a 9:00 IST meeting, colleagues in Korea join at 12:30 KST, so the Korean workday is already further along.
When is 9 AM IST in KST?
9:00 IST = 12:30 KST. This is a useful reference point for remote teams because an India morning standup or client check-in becomes an early afternoon meeting in Korea, which usually still fits comfortably within the same business day.
Does the IST to KST difference change during DST?
No, the difference does not change during DST because India Standard Time does not observe DST and Korea Standard Time does not observe DST. The gap remains 3 hours 30 minutes throughout the year, so recurring calls do not need seasonal rescheduling.
What is the best meeting time between IST and KST?
A strong meeting window is the India morning to midday period because it converts into Korea’s early-to-mid afternoon. For example, 9:00 IST = 12:30 KST and 12:00 IST = 15:30 KST, which creates a practical overlap for business reviews, software coordination, and supplier discussions without pushing Korean participants too late into the evening.
When is 12 PM IST in KST?
12:00 IST = 15:30 KST. That makes India lunchtime a mid-afternoon slot in Korea, which is often suitable for follow-up meetings, project checkpoints, or same-day approvals between teams working across India and the Korean Peninsula.
When is 3 PM IST in KST?
15:00 IST = 18:30 KST. This can still work for urgent coordination, but it moves the Korean side into the evening, so it is usually better for exceptions, release-day communication, or short decision calls rather than long recurring meetings.
Is IST India Standard Time or Irish Standard Time?
On this page, IST means India Standard Time, which is UTC+5:30. IST can also refer to Irish Standard Time, which is UTC+1, and that version is covered at /time-converter/ist-ireland-time-zone; IST can also refer to Israel Standard Time, which is UTC+2, at /time-converter/ist-israel-time-zone.
Which countries use KST and IST?
India Standard Time is used in India. Korea Standard Time is used in North Korea and South Korea, which is why this conversion is relevant for regional business communication, travel planning, and cross-border scheduling between India and the Korean Peninsula.