City comparison · time difference and converter
Seoul is 1 hour ahead of New Taipei City right now. New Taipei City sits in Taiwan on Taipei; Seoul sits in South Korea on Seoul. They are roughly 1,485 km apart (923 mi), a flight of about 2h 45m. New Taipei City's metro holds around 4.0 million people; Seoul's around 25.7 million.
Slot 1
09:00 / 10:00
New Taipei City / Seoul
Both inside business hoursSlot 2
10:00 / 11:00
New Taipei City / Seoul
Both inside business hoursSlot 3
11:00 / 12:00
New Taipei City / Seoul
Both inside business hoursEach row is one hour in New Taipei City. 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.
Local Election Day
Seoul, South Korea · 지방 선거일
Wed, Jun 3
Memorial Day
Seoul, South Korea · 현충일
Sat, Jun 6
Great-circle distance
1,485 km
(923 mi)
Approximate flight
2h 45m
850 km/h cruise + 1h taxi/climb/descent
Jet lag
1h
Roughly 1 day to adjust per timezone crossed
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 →The difference between New Taipei City and Seoul is not really a number, it's a daily rhythm. Seoul is 1 hour ahead of New Taipei City on the clock today, but the lived version is that Seoul is wrapping up the working day while New Taipei City is still in the morning, and the overlap people actually use is narrow. That gap, more than the raw offset, is what teams have to design around.
In New Taipei City, the working day picks up earliest in the financial districts — New Taipei City's downtown core wakes early and breaks for lunch at the usual hour. The mood in Seoul is its own story: Seoul 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. Taiwan either observes DST or holds a fixed offset year-round; South Korea either follows its region's DST pattern or stays put all year. When the two changes are weeks apart, the offset between New Taipei City and Seoul 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 45m 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.