Live Synchronized Time Difference
ShanghaitoSeoulTime Difference
🇨🇳
Shanghai
China (GMT+8)23:10:39UTC+8:00
🇰🇷
Seoul
South Korea (GMT+9)00:10:39UTC+9:00
Direct Distance866 km (538 miles)
Estimated Flight Time~1.5 hours
Business Overlap7 overlapping hours (9am–5pm)
Mutual Working Window: 7 Overlapping Hours
Recommended calling window between Shanghai and Seoul
Off-Peak Calling Window
Shanghai Time
9:00 AM – 4:00 PM
Seoul Time
10:00 AM – 5:00 PM
Both locations share 7 overlapping standard business hours (9:00 AM – 5:00 PM). This is the premier window for real-time video conferences, corporate calls, and instant collaboration without outside-hours disruption.
24-Hour Schedule Conversion Matrix
Compare every hour of the day between Shanghai and Seoul.
Work (9am-5pm)ShoulderSleep / Off
| Shanghai Time (China) | Seoul Time (South Korea) | Status & Recommendation |
|---|---|---|
| 00:00AM | 01:00AM | ⚪ Outside Work Hours |
| 01:00AM | 02:00AM | ⚪ Outside Work Hours |
| 02:00AM | 03:00AM | ⚪ Outside Work Hours |
| 03:00AM | 04:00AM | ⚪ Outside Work Hours |
| 04:00AM | 05:00AM | ⚪ Outside Work Hours |
| 05:00AM | 06:00AM | ⚪ Outside Work Hours |
| 06:00AM | 07:00AM | ⚪ Outside Work Hours |
| 07:00AM | 08:00AM | ⚪ Outside Work Hours |
| 08:00AM | 09:00AM | ⚪ Outside Work Hours |
| 09:00AM | 10:00AM | 🟢 Ideal Meeting Window |
| 10:00AM | 11:00AM | 🟢 Ideal Meeting Window |
| 11:00AM | 12:00PM | 🟢 Ideal Meeting Window |
| 12:00PM | 13:00PM | 🟢 Ideal Meeting Window |
| 13:00PM | 14:00PM | 🟢 Ideal Meeting Window |
| 14:00PM | 15:00PM | 🟢 Ideal Meeting Window |
| 15:00PM | 16:00PM | 🟢 Ideal Meeting Window |
| 16:00PM | 17:00PM | 🟡 Feasible (Shoulder Hour) |
| 17:00PM | 18:00PM | ⚪ Outside Work Hours |
| 18:00PM | 19:00PM | ⚪ Outside Work Hours |
| 19:00PM | 20:00PM | ⚪ Outside Work Hours |
| 20:00PM | 21:00PM | ⚪ Outside Work Hours |
| 21:00PM | 22:00PM | ⚪ Outside Work Hours |
| 22:00PM | 23:00PM | ⚪ Outside Work Hours |
| 23:00PM | 00:00AM | ⚪ Outside Work Hours |
Frequently Asked Questions
What is the time difference between Shanghai and Seoul?
Seoul is 1 hour ahead of Shanghai.
What is the best time to schedule a cross-border meeting between Shanghai and Seoul?
There are 7 overlapping standard business hours (09:00 - 17:00) between Shanghai and Seoul. The optimal window is when both parties are in their core working shifts.
Does daylight saving time (DST) affect the time difference between Shanghai and Seoul?
Yes. If either China or South Korea observes seasonal Daylight Saving Time transitions, the offset difference shifts by one hour on scheduled transition dates.