City comparison · time difference and converter
San Francisco is 3 hours behind New York right now. New York sits in United States on New York; San Francisco sits in United States on Los Angeles. They are roughly 4,129 km apart (2,566 mi), a flight of about 5h 51m. New York's metro holds around 19.5 million people; San Francisco's around 4.7 million.
Slot 1
12:00 / 09:00
New York / San Francisco
Both inside business hoursSlot 2
13:00 / 10:00
New York / San Francisco
Both inside business hoursSlot 3
14:00 / 11:00
New York / San Francisco
Both inside business hoursEach row is one hour in New York. 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
United States
Fri, Jun 19
Great-circle distance
4,129 km
(2,566 mi)
Approximate flight
5h 51m
850 km/h cruise + 1h taxi/climb/descent
Jet lag
3h
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 York and San Francisco is not really a number, it's a daily rhythm. San Francisco is 3 hours behind New York on the clock today, but the lived version is that New York is ahead in the calendar, so by the time San Francisco comes online, half of New York's day is already gone. That gap, more than the raw offset, is what teams have to design around.
In New York, the working day picks up earliest in the financial districts — Lower Manhattan trading floors hum from 06:30 ahead of the cash open. 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. United States shifts the clock on the second Sunday of March and the first Sunday of November; 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 York 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 5h 51m 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 3-hour gap costs about 3 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.