Brazil Jet Lag Calculator

A gap this size is a weekend problem, not a week problem: Brasília mornings feel early at first. By day three or four in Brazil, your body has caught up. Two Brazil specifics compound the shift: Brasília sits at 1,172 m (altitude makes poor sleep feel worse), and South America sits on the South America travel circuit most Brazil itineraries follow.

From London the shift to Brasília is 3 hours westward; New York faces 2; Tokyo 12; Sydney 13. Reference frame for Brazil: Brasília keeps UTC-3 and sits 1,172 m above sea level in South America, with that same offset in every season.

Dry cabin air quietly drains you on the way to Brazil; an extra 500 ml of water per 3 hours in the air keeps the Brasília arrival day survivable. Each eastbound zone costs about one recovery day, each westbound zone about two-thirds of a day — so the London–Brasília leg (westbound, 3 hours) bills you about 2 days, while flying the opposite direction would cost only 3.

On arrival, anchor the new rhythm with an outdoor morning in Brasília and meals on Brazil time from the first day. Applied to this South America trip: 3 hours west from London to Brasília maps to about 2 reset days, so a Brazil itinerary should front-load outdoor time on days one to 2.

The Brazil sleep kit for Brasília at 1,172 m: an eye mask, earplugs, curtains closed against late evening light, and a room held near 16–20°C. A 10-minute warm shower an hour before bed speeds the core-temperature drop that starts sleep — a real head-start on the first jangled Brazil nights in Brasília.

Naps are a tool with a limit in Brazil: 20–30 minutes, done by 3pm Brasília time, never as a substitute for a full local night. Practical baseline: lights out in a dark 16–20°C Brasília room (1,172 m, UTC-3), and no evening alcohol for the first two nights while the Brazil clock settles.