Three numbers. The ones that decide the meeting.
When the world meets at work.
Read the day in both zones.
If it's this in San Juan, it's that in Shanghai.
When it's 8:00 am in San Juan, it's 8:00 pm in Shanghai — evening there, the same day.
When it's 10:00 am in San Juan, it's 10:00 pm in Shanghai — night there, the same day.
When it's 12:00 pm in San Juan, it's 12:00 am in Shanghai — late night there, the next day.
When it's 3:00 pm in San Juan, it's 3:00 am in Shanghai — late night there, the next day.
When it's 5:00 pm in San Juan, it's 5:00 am in Shanghai — morning there, the next day.
When it's 9:00 pm in San Juan, it's 9:00 am in Shanghai — late morning there, the next day.
Crossing the border. Money, language, plugs.
Money changes hands at the border: San Juan uses the USD ($) and Shanghai uses the CNY (¥). Language shifts too — English in San Juan, Chinese in Shanghai. Cars drive on the right in both, so rentals feel familiar.
- Country
- Puerto Rico
- Capital
- San Juan
- Currency
- United States dollar (USD · $)
- Language
- English, Spanish
- Calling code
- +1
- Drives on
- Right
- Country
- China
- Capital
- Beijing
- Currency
- Chinese yuan (CNY · ¥)
- Language
- Chinese
- Calling code
- +86
- Drives on
- Right
Quick answers. Before you book the call.
What's the time difference between San Juan and Shanghai?
San Juan is 12 hours ahead of Shanghai. San Juan runs on GMT-4 and Shanghai on GMT+8. The gap can shift by an hour when either side enters or leaves daylight saving — the live clocks above always reflect the current offset.
When it's 10 am in San Juan, what time is it in Shanghai?
10:00 am in San Juan is 10:00 pm in Shanghai on the same day — night there. The same shift applies to any hour; the quick-conversion cards and the 24-hour table above cover the full day.
When it's 3 pm in San Juan, what time is it in Shanghai?
3:00 pm in San Juan is 3:00 am in Shanghai the next day — late night there. The same shift applies to any hour; the quick-conversion cards and the 24-hour table above cover the full day.
When's the best time to schedule a meeting?
Standard 09:00–17:00 workdays don't intersect. Most teams compromise with one side meeting early (before 09:00) or late (after 17:00).
Does daylight saving time change the difference?
Yes, if either city observes DST. When one side shifts and the other doesn't, the gap changes by one hour. The DST badges under each clock show whether each zone is currently shifted and when the next transition lands.
How far is San Juan from Shanghai?
About 14,430 km as the crow flies (great-circle distance). A non-stop commercial flight cruises that in roughly 17h 29m, not counting airport time, winds, or routing around restricted airspace.
Can I send this meeting time as a calendar invite?
Yes. Pick a time on the slider above, open the meeting card, customize the title and duration, then download the .ics file. It imports cleanly into Google Calendar, Outlook, and Apple Calendar with the correct timezone attached.
What currency do San Juan and Shanghai use?
San Juan uses the United States dollar (USD, $); Shanghai uses the Chinese yuan (CNY, ¥). Check the live rate before transferring money or paying with a card abroad — most banks add a 1–3 % FX margin on top of the mid-market rate.
How do I call San Juan from Shanghai?
Dial the international prefix used by your carrier (often 00), then +1, then the local number — drop any leading zero of the city or mobile code. For free calls, WhatsApp, Signal, and FaceTime work over Wi-Fi regardless of country code.
What language is spoken in San Juan and Shanghai?
San Juan primarily speaks English, Spanish; Shanghai speaks Chinese. English is widely used in business contexts in major cities of both, but written contracts may need translation.
Do San Juan and Shanghai drive on the same side of the road?
Yes — both drive on the right. Rental cars feel identical between the two.