Los Altos to Seoul time converter

Seoul is 16 hours ahead of Los Altos. When it is 9:00 AM in Los Altos, it is 1:00 AM (Wed, Oct 21) in Seoul.

Los Altos PDT

Tuesday, October 20, 2026

Seoul KST

Wednesday, October 21, 2026

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

Los Altos to Seoul conversion table

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

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

Best time to call or meet

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

Daylight saving time and the difference

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

  • Oct 20, 2026 – Nov 1, 2026: +16h
  • Nov 1, 2026 – Mar 14, 2027: +17h
  • Mar 14, 2027 – Oct 20, 2027: +16h

Distance

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

More conversions

Seoul to Los AltosLos Altos to New YorkLos Altos to LondonLos Altos to Los AngelesLos Altos to ChicagoLos Altos to TorontoLos Altos to São PauloLos Altos to ParisLos Altos to BerlinLos Altos to MoscowLos Altos to DubaiLos Altos to New DelhiLos Altos to Bangkok
New York to SeoulLondon to SeoulLos Angeles to SeoulChicago to SeoulToronto to SeoulSão Paulo to SeoulParis to SeoulBerlin to SeoulMoscow to SeoulDubai to SeoulNew Delhi to SeoulBangkok to Seoul

Questions and answers

What is the time difference between Los Altos and Seoul?

Seoul is 16 hours ahead of Los Altos.

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

When it is 9:00 AM in Los Altos, it is 1:00 AM (Wed, Oct 21) in Seoul.

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

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

Does the time difference between Los Altos and Seoul change?

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