Shanghai to San Juan time converter

San Juan is 12 hours behind Shanghai. When it is 9:00 AM in Shanghai, it is 9:00 PM (Mon, Oct 19) in San Juan.

Shanghai CST

Tuesday, October 20, 2026

San Juan AST

Tuesday, October 20, 2026

Shanghai
China
Tue, Oct 20
CSTUTC+8
San Juan
Puerto Rico
Tue, Oct 20
ASTUTC-4-12h
Finding your time zone…
Shared working hours (9:00–18:00)

Shanghai to San Juan conversion table

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

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

Best time to call or meet

Working hours don't overlap fully. The closest fit is 9:00 AM – 10:00 AM in Shanghai (9:00 PM – 10:00 PM in San Juan): working hours on one side, early or late on the other.

Daylight saving time and the difference

The difference stays 12 hours all year.

Distance

Shanghai and San Juan are 14,431 km (8,967 miles) apart in a straight line.

More conversions

San Juan 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 San JuanLondon to San JuanLos Angeles to San JuanChicago to San JuanToronto to San JuanSão Paulo to San JuanParis to San JuanBerlin to San JuanMoscow to San JuanDubai to San JuanNew Delhi to San JuanBangkok to San Juan

Questions and answers

What is the time difference between Shanghai and San Juan?

San Juan is 12 hours behind Shanghai.

What time is it in San Juan when it is 9 AM in Shanghai?

When it is 9:00 AM in Shanghai, it is 9:00 PM (Mon, Oct 19) in San Juan.

When is the best time to call San Juan from Shanghai?

Working hours don't overlap fully. The closest fit is 9:00 AM – 10:00 AM in Shanghai (9:00 PM – 10:00 PM in San Juan): working hours on one side, early or late on the other.

Does the time difference between Shanghai and San Juan change?

No. The difference stays 12 hours all year.