Shanghai to Costa Mesa time converter

Costa Mesa is 15 hours behind Shanghai. When it is 9:00 AM in Shanghai, it is 6:00 PM (Mon, Oct 19) in Costa Mesa.

Shanghai CST

Tuesday, October 20, 2026

Costa Mesa PDT

Monday, October 19, 2026

Shanghai
China
Tue, Oct 20
CSTUTC+8
Costa Mesa
California, United States
Mon, Oct 19
PDTUTC-7-15h
Finding your time zone…
Shared working hours (9:00–18:00)

Shanghai to Costa Mesa conversion table

Every hour of today in Shanghai and the matching time in Costa Mesa. Light rows are typical working hours (9:00–18:00).

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

Best time to call or meet

Working hours don't overlap fully. The closest fit is 7:00 AM – 9:00 AM in Shanghai (4:00 PM – 6:00 PM in Costa Mesa): working hours on one side, early or late on the other.

Daylight saving time and the difference

The difference changes during the year because Shanghai and Costa Mesa switch clocks on different dates:

  • Oct 20, 2026 – Nov 1, 2026: -15h
  • Nov 1, 2026 – Mar 14, 2027: -16h
  • Mar 14, 2027 – Oct 20, 2027: -15h

Distance

Shanghai and Costa Mesa are 10,489 km (6,518 miles) apart in a straight line.

More conversions

Costa Mesa to ShanghaiShanghai to New YorkShanghai to LondonShanghai to Los AngelesShanghai to ChicagoShanghai to TorontoShanghai to São PauloShanghai to ParisShanghai to BerlinShanghai to MoscowShanghai to DubaiShanghai to New DelhiShanghai to Bangkok
New York to Costa MesaLondon to Costa MesaLos Angeles to Costa MesaChicago to Costa MesaToronto to Costa MesaSão Paulo to Costa MesaParis to Costa MesaBerlin to Costa MesaMoscow to Costa MesaDubai to Costa MesaNew Delhi to Costa MesaBangkok to Costa Mesa

Questions and answers

What is the time difference between Shanghai and Costa Mesa?

Costa Mesa is 15 hours behind Shanghai.

What time is it in Costa Mesa when it is 9 AM in Shanghai?

When it is 9:00 AM in Shanghai, it is 6:00 PM (Mon, Oct 19) in Costa Mesa.

When is the best time to call Costa Mesa from Shanghai?

Working hours don't overlap fully. The closest fit is 7:00 AM – 9:00 AM in Shanghai (4:00 PM – 6:00 PM in Costa Mesa): working hours on one side, early or late on the other.

Does the time difference between Shanghai and Costa Mesa change?

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