City comparison · time difference and converter
Seoul vs Shanghai time difference and converter
Shanghai is 1 hour behind Seoul right now. Seoul sits in South Korea on Seoul; Shanghai sits in China on Shanghai. They are roughly 866 km apart (538 mi), a flight of about 2h 01m. Seoul's metro holds around 25.7 million people; Shanghai's around 26.3 million.
Seoul
Shanghai
Best meeting times today
Open converter →Slot 1
10:00 / 09:00
Seoul / Shanghai
Both inside business hoursSlot 2
11:00 / 10:00
Seoul / Shanghai
Both inside business hoursSlot 3
12:00 / 11:00
Seoul / Shanghai
Both inside business hours24-hour comparison heatmap
Each row is one hour in Seoul. Green rows are inside business hours in both cities; amber means only one side is at their desk; grey rows fall outside business hours in both.
Public holidays in November 2026
No public holidays in South Korea or China this month.
Travel context
Great-circle distance
866 km
(538 mi)
Approximate flight
2h 01m
850 km/h cruise + 1h taxi/climb/descent
Jet lag
1h
Roughly 1 day to adjust per timezone crossed
Convert any specific time
The heatmap gives you the shape of the day. If you need to convert one specific hour, say a customer call or a release window, open the converter with both cities already loaded.
Open in converter →Frequently asked questions
Working between Seoul and Shanghai
The difference between Seoul and Shanghai is not really a number, it's a daily rhythm. Shanghai is 1 hour behind Seoul on the clock today, but the lived version is that Seoul is ahead in the calendar, so by the time Shanghai comes online, half of Seoul's day is already gone. That gap, more than the raw offset, is what teams have to design around.
In Seoul, the working day picks up earliest in the financial districts- Seoul's downtown core wakes early and breaks for lunch at the usual hour. The mood in Shanghai is its own story: Shanghai settles into the evening at the usual hour, with the local commuter pattern setting the pace. If you are scheduling between the two, the heatmap above marks the rows where both patterns line up.
Daylight saving is the other thing to keep an eye on. South Korea either observes DST or holds a fixed offset year-round; China either follows its region's DST pattern or stays put all year. When the two changes are weeks apart, the offset between Seoul and Shanghai is one hour off the usual for that stretch, a cliff that catches recurring calendar invites unless your calendar app rebases them automatically. Pin the meeting to a city, not an offset, and the tool handles the rest.
For travellers, the 2h 01m flight is the short version of the story. The longer one is jet lag: roughly one day of adjustment per timezone crossed, which means a trip across the 1-hour gap costs about 1 groggy days on each side. Pilots and cabin crew swear by morning sunlight and an early walk; whatever your routine, the wall-clock numbers above are the source of truth for your first morning in the new city.