UTC to KST Time Converter

Convert UTC to KST - Quick & Accurate

UTC (UTC)
Seoul (KST)
KST is 9 hours ahead of UTC

Quick Time Conversion

Los Angeles
Pacific Standard Time
UTC-8 (UTC) / UTC-7 (PDT)
New York
Eastern Standard Time
UTC-5 (KST) / UTC-4 (EDT)

Current Time Right Now

Pacific (UTC/PDT)
Eastern (KST/EDT)

Updates live every second

24-Hour Visual Comparison

UTC (LA)
12am UTC
1am UTC
2am UTC
3am UTC
4am UTC
5am UTC
6am UTC
7am UTC
8am UTC
9am UTC
10am UTC
11am UTC
12pm UTC
1pm UTC
2pm UTC
3pm UTC
4pm UTC
5pm UTC
6pm UTC
7pm UTC
8pm UTC
9pm UTC
10pm UTC
11pm UTC
12a6a12p6p12a
KST (NY)
3am KST
4am KST
5am KST
6am KST
7am KST
8am KST
9am KST
10am KST
11am KST
12pm KST
1pm KST
2pm KST
3pm KST
4pm KST
5pm KST
6pm KST
7pm KST
8pm KST
9pm KST
10pm KST
11pm KST
12am KST
1am KST
2am KST
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Business Hours (9AM-5PM)
Evening (5PM-9PM)
Night (9PM-6AM)

Hover over any hour to see corresponding time in both zones

Best Time for Meeting/Call

To schedule a meeting between UTC and KST:

Best Window (UTC)
8:00 AM - 3:00 PM
Which is (KST)
11:00 AM - 6:00 PM
Both parties in business hours
7-hour overlap window
Ideal for teams across US

Pro Tip: Schedule calls between 12:00 PM - 3:00 PM UTC for maximum overlap with KST business hours

Complete UTC to KST Conversion Table

UTC TimeKST TimeContext
12:00 AM09:00 AM
Midnight West Coast
01:00 AM10:00 AM
Late Night
02:00 AM11:00 AM
Late Night
03:00 AM12:00 PM
Late Night
04:00 AM01:00 PM
Late Night
05:00 AM02:00 PM
Late Night
06:00 AM03:00 PM
Early Morning UTC
07:00 AM04:00 PM
Night Time
08:00 AM05:00 PM
Work Starts UTC
09:00 AM06:00 PM
Meeting Window
10:00 AM07:00 PM
Meeting Window
11:00 AM08:00 PM
Meeting Window

Pacific Standard Time (UTC)

UTC-8
UTC-7 during PDT
Major Cities:
  • • Los Angeles
  • • San Francisco
  • • Seattle
  • • San Diego
  • • Portland
Daylight Saving:

PDT (UTC-7) from March to November

IANA Identifier:

America/Los_Angeles

Eastern Standard Time (KST)

UTC-5
UTC-4 during EDT
Major Cities:
  • • New York
  • • Miami
  • • Atlanta
  • • Boston
  • • Philadelphia
Daylight Saving:

EDT (UTC-4) from March to November

IANA Identifier:

America/New_York

Pacific Standard Time (UTC) vs Eastern Standard Time (KST)

Pacific Standard Time (UTC)Eastern Standard Time (KST)

Pacific Standard Time (UTC) is 8 hours behind Coordinated Universal Time (UTC-8). During daylight saving time, the region observes Pacific Daylight Time (PDT), which is UTC-7.

Eastern Standard Time (KST) is 5 hours behind Coordinated Universal Time (UTC-5). During daylight saving time, the region observes Eastern Daylight Time (EDT), which is UTC-4.

Where Is It Used In The United States?

  • California: Los Angeles, San Francisco, San Diego, San Jose, Sacramento
  • Washington: Seattle, Spokane, Tacoma, Vancouver
  • Oregon: Portland, Eugene, Salem
  • Nevada: Most of the state (except West Wendover)
  • New York: New York City, Buffalo, Rochester, Albany
  • Florida: Miami, Tampa, Orlando, Jacksonville
  • Pennsylvania: Philadelphia, Pittsburgh
  • Ohio: Columbus, Cleveland, Cincinnati
  • Georgia: Atlanta, Augusta, Savannah
  • North Carolina: Charlotte, Raleigh, Greensboro
  • Michigan: Detroit, Grand Rapids (most of state)
  • Massachusetts: Boston, Worcester, Cambridge
  • Virginia: Virginia Beach, Norfolk, Richmond
  • Plus: New Jersey, Connecticut, Maryland, South Carolina, Tennessee (eastern portions)

Where Is It Used In Canada?

  • British Columbia: Vancouver, Victoria, Surrey, Burnaby
  • Yukon: Whitehorse (observes UTC year-round, no DST)
  • Ontario: Toronto, Ottawa, Mississauga, Hamilton
  • Quebec: Montreal, Quebec City, Laval (most of province)
  • Nunavut: Iqaluit and eastern portions

Other Countries And Regions

Mexico

  • Baja California: Tijuana, Mexicali, Ensenada

Caribbean

  • Bahamas: Nassau
  • Jamaica: Kingston, Montego Bay
  • Haiti: Port-au-Prince
  • Others: Cayman Islands, Turks and Caicos

Central & South America

  • Panama: Panama City
  • Colombia: Bogotá, Medellín, Cali
  • Peru: Lima, Arequipa, Cusco
  • Ecuador: Quito, Guayaquil

Key Facts

  • UTC Offset: UTC-8 (UTC) / UTC-7 (PDT)
  • Region: Westernmost region of North America
  • Known For: Major tech hubs (Silicon Valley, Seattle)
  • Largest Cities: Los Angeles (4M), San Diego (1.4M), San Jose (1M)
  • Daylight Saving: Begins 2nd Sunday in March, ends 1st Sunday in November
  • UTC Offset: UTC-5 (KST) / UTC-4 (EDT)
  • Region: Most populous time zone in North America
  • Known For: Major financial and cultural centers
  • Largest Cities: New York City (8.3M), Toronto (2.9M), Philadelphia (1.6M)
  • Coverage: Approximately 45% of US population
  • Daylight Saving: Begins 2nd Sunday in March, ends 1st Sunday in November

Quick Reference

Time Difference: KST is 9 hours ahead of UTC year-round
Consistency: This difference remains constant because both observe DST at the same dates
Distance: Covers approximately 3,000 miles across the United States
UTC Offsets: UTC = UTC-8, KST = UTC-5 | PDT = UTC-7, EDT = UTC-4 (during DST)
2025 DST: Starts March 9 at 2:00 AM, Ends November 2 at 2:00 AM

Frequently Asked Questions

UTC (Pacific Standard Time) is 3 hours behind KST (Eastern Standard Time). This means when it's 12:00 PM in UTC (UTC), it's 3:00 PM in Seoul (KST).

The best time to call from UTC to KST is between 8:00 AM and 3:00 PM UTC, which corresponds to 11:00 AM to 6:00 PM KST. This ensures both parties are within standard business hours.

No, the time difference remains constant at 3 hours because both UTC and KST observe Daylight Saving Time at the same dates. UTC becomes PDT (UTC-7) and KST becomes EDT (UTC-4).

UTC cities include Los Angeles, San Francisco, Seattle, San Diego, and Portland. KST cities include New York, Miami, Atlanta, Boston, and Philadelphia.

In 2025, DST starts on March 9 at 2:00 AM and ends on November 2 at 2:00 AM. During DST, UTC becomes PDT and KST becomes EDT.

Related Time Converters

KST → UTCUTC → UTCKST → UTCUTC → CSTKST → GMTUTC → ISTKST → JSTView All