City comparison · time difference and converter
Porto Alegre is 6 hours behind Cairo right now. Cairo sits in Egypt on Cairo; Porto Alegre sits in Brazil on Sao Paulo. They are roughly 10,982 km apart (6,824 mi), a flight of about 13h 55m. Cairo's metro holds around 21.7 million people; Porto Alegre's around 1.5 million.
Slot 1
15:00 / 09:00
Cairo / Porto Alegre
Both inside business hoursSlot 2
16:00 / 10:00
Cairo / Porto Alegre
Both inside business hoursSlot 3
09:00 / 03:00
Cairo / Porto Alegre
Partial overlapEach row is one hour in Cairo. 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.
No public holidays in Egypt or Brazil this month.
Great-circle distance
10,982 km
(6,824 mi)
Approximate flight
13h 55m
850 km/h cruise + 1h taxi/climb/descent
Jet lag
6h
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 Cairo and Porto Alegre is not really a number, it's a daily rhythm. Porto Alegre is 6 hours behind Cairo on the clock today, but the lived version is that Cairo is ahead in the calendar, so by the time Porto Alegre comes online, half of Cairo's day is already gone. That gap, more than the raw offset, is what teams have to design around.
In Cairo, the working day picks up earliest in the financial districts — Cairo's downtown core wakes early and breaks for lunch at the usual hour. The mood in Porto Alegre is its own story: Porto Alegre 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. Egypt either observes DST or holds a fixed offset year-round; Brazil either follows its region's DST pattern or stays put all year. When the two changes are weeks apart, the offset between Cairo and Porto Alegre 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 55m 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 6-hour gap costs about 6 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.