Seoul to Los Altos time converter

Los Altos is 16 hours behind Seoul. When it is 9:00 AM in Seoul, it is 5:00 PM (Tue, Oct 20) in Los Altos.

Seoul KST

Wednesday, October 21, 2026

Los Altos PDT

Tuesday, October 20, 2026

Seoul
South Korea
Wed, Oct 21
KSTUTC+9
Los Altos
California, United States
Tue, Oct 20
PDTUTC-7-16h
Finding your time zone…
Shared working hours (9:00–18:00)

Seoul to Los Altos conversion table

Every hour of today in Seoul and the matching time in Los Altos. Light rows are typical working hours (9:00–18:00).

SeoulLos Altos
12:00 AM8:00 AM−1 day
1:00 AM9:00 AM−1 day
2:00 AM10:00 AM−1 day
3:00 AM11:00 AM−1 day
4:00 AM12:00 PM−1 day
5:00 AM1:00 PM−1 day
6:00 AM2:00 PM−1 day
7:00 AM3:00 PM−1 day
8:00 AM4:00 PM−1 day
9:00 AM5:00 PM−1 day
10:00 AM6:00 PM−1 day
11:00 AM7:00 PM−1 day
12:00 PM8:00 PM−1 day
1:00 PM9:00 PM−1 day
2:00 PM10:00 PM−1 day
3:00 PM11:00 PM−1 day
4:00 PM12:00 AM
5:00 PM1:00 AM
6:00 PM2:00 AM
7:00 PM3:00 AM
8:00 PM4:00 AM
9:00 PM5:00 AM
10:00 PM6:00 AM
11:00 PM7:00 AM

Best time to call or meet

Both sides are at work from 9:00 AM – 10:00 AM in Seoul (5:00 PM – 6:00 PM in Los Altos).

Daylight saving time and the difference

The difference changes during the year because Seoul and Los Altos switch clocks on different dates:

  • Oct 21, 2026 – Nov 1, 2026: -16h
  • Nov 1, 2026 – Mar 14, 2027: -17h
  • Mar 14, 2027 – Oct 21, 2027: -16h

Distance

Seoul and Los Altos are 9,078 km (5,641 miles) apart in a straight line.

More conversions

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New York to Los AltosLondon to Los AltosLos Angeles to Los AltosChicago to Los AltosToronto to Los AltosSão Paulo to Los AltosParis to Los AltosBerlin to Los AltosMoscow to Los AltosDubai to Los AltosNew Delhi to Los AltosBangkok to Los Altos

Questions and answers

What is the time difference between Seoul and Los Altos?

Los Altos is 16 hours behind Seoul.

What time is it in Los Altos when it is 9 AM in Seoul?

When it is 9:00 AM in Seoul, it is 5:00 PM (Tue, Oct 20) in Los Altos.

When is the best time to call Los Altos from Seoul?

Both sides are at work from 9:00 AM – 10:00 AM in Seoul (5:00 PM – 6:00 PM in Los Altos).

Does the time difference between Seoul and Los Altos change?

Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.