City comparison · time difference and converter
Sofia is 5 hours behind Shanghai right now. Shanghai sits in China on Shanghai; Sofia sits in Bulgaria on Sofia. They are roughly 8,315 km apart (5,167 mi), a flight of about 10h 47m. Shanghai's metro holds around 26.3 million people; Sofia's around 1.2 million.
Slot 1
14:00 / 09:00
Shanghai / Sofia
Both inside business hoursSlot 2
15:00 / 10:00
Shanghai / Sofia
Both inside business hoursSlot 3
16:00 / 11:00
Shanghai / Sofia
Both inside business hoursEach row is one hour in Shanghai. 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.
Dragon Boat Festival
Shanghai, China · 端午节
Fri, Jun 19
Great-circle distance
8,315 km
(5,167 mi)
Approximate flight
10h 47m
850 km/h cruise + 1h taxi/climb/descent
Jet lag
5h
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 Shanghai and Sofia is not really a number, it's a daily rhythm. Sofia is 5 hours behind Shanghai on the clock today, but the lived version is that Shanghai is ahead in the calendar, so by the time Sofia comes online, half of Shanghai's day is already gone. That gap, more than the raw offset, is what teams have to design around.
In Shanghai, the working day picks up earliest in the financial districts — Shanghai's downtown core wakes early and breaks for lunch at the usual hour. The mood in Sofia is its own story: Sofia 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. China either observes DST or holds a fixed offset year-round; Bulgaria follows the EU calendar (last Sunday of March and October). When the two changes are weeks apart, the offset between Shanghai and Sofia 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 10h 47m 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 5-hour gap costs about 5 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.