City comparison · time difference and converter
San Francisco is 15 hours behind New Taipei City right now. New Taipei City sits in Taiwan on Taipei; San Francisco sits in United States on Los Angeles. They are roughly 10,363 km apart (6,439 mi), a flight of about 13h 12m. New Taipei City's metro holds around 4.0 million people; San Francisco's around 4.7 million.
Slot 1
00:00 / 09:00
New Taipei City / San Francisco
Partial overlapSlot 2
01:00 / 10:00
New Taipei City / San Francisco
Partial overlapSlot 3
02:00 / 11:00
New Taipei City / San Francisco
Partial overlapEach 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.
Juneteenth
San Francisco, United States
Fri, Jun 19
Great-circle distance
10,363 km
(6,439 mi)
Approximate flight
13h 12m
850 km/h cruise + 1h taxi/climb/descent
Jet lag
15h
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 San Francisco is not really a number, it's a daily rhythm. San Francisco is 15 hours behind New Taipei City on the clock today, but the lived version is that New Taipei City is ahead in the calendar, so by the time San Francisco comes online, half of New Taipei City's day is already gone. 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 San Francisco is its own story: SoMa and FiDi quiet around 18:00, with Mission bars taking the after-work crowd. 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; United States shifts on the second Sunday of March and the first Sunday of November. When the two changes are weeks apart, the offset between New Taipei City and San Francisco 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 13h 12m 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 15-hour gap costs about 15 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.