AST to BRT Converter
BRT is 1 hour ahead of AST. 9:00 AM AST = 10:00 AM BRT.
BRT is 1 hour ahead of AST at the moment. To convert AST to BRT, add 1 hour to the AST time: 9:00 AM AST = 10:00 AM BRT.
AST (Atlantic Time) is used in Nova Scotia, New Brunswick, PEI; Puerto Rico and the Eastern Caribbean (all year). BRT (Brasília Time) is used in Brasília, São Paulo, Rio de Janeiro.
AST here is Atlantic Standard Time, not Arabia Standard Time.
AST to BRT time conversion table
AST to BRT on 6 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| AST | BRT | Day |
|---|---|---|
| 12:00 AM AST | 1:00 AM BRT | night |
| 1:00 AM AST | 2:00 AM BRT | night |
| 2:00 AM AST | 3:00 AM BRT | night |
| 3:00 AM AST | 4:00 AM BRT | night |
| 4:00 AM AST | 5:00 AM BRT | night |
| 5:00 AM AST | 6:00 AM BRT | — |
| 6:00 AM AST | 7:00 AM BRT | — |
| 7:00 AM AST | 8:00 AM BRT | — |
| 8:00 AM AST | 9:00 AM BRT | — |
| 9:00 AM AST | 10:00 AM BRT | work hours |
| 10:00 AM AST | 11:00 AM BRT | work hours |
| 11:00 AM AST | 12:00 PM BRT | work hours |
| 12:00 PM AST | 1:00 PM BRT | work hours |
| 1:00 PM AST | 2:00 PM BRT | work hours |
| 2:00 PM AST | 3:00 PM BRT | work hours |
| 3:00 PM AST | 4:00 PM BRT | work hours |
| 4:00 PM AST | 5:00 PM BRT | — |
| 5:00 PM AST | 6:00 PM BRT | — |
| 6:00 PM AST | 7:00 PM BRT | — |
| 7:00 PM AST | 8:00 PM BRT | — |
| 8:00 PM AST | 9:00 PM BRT | — |
| 9:00 PM AST | 10:00 PM BRT | night |
| 10:00 PM AST | 11:00 PM BRT | night |
| 11:00 PM AST | 12:00 AM BRT | next day |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert AST to BRT
Add 1 hour to the AST time to get BRT.
Example: 9:00 AM AST = 10:00 AM BRT.
Across midnight: 11:00 PM AST = 12:00 AM BRT (next day). The date changes, so always check the day as well as the hour.
Time difference between AST and BRT
The time difference between AST and BRT is not the same all year, because the two sides change for daylight saving time on different dates. In 2026 it works out like this:
- 31 Dec 2025 – 7 Mar 2026: BRT is 1 hour ahead of AST.
- 8 Mar 2026 – 31 Oct 2026: BRT and AST are on the same time.
- 1 Nov 2026 – 30 Dec 2026: BRT is 1 hour ahead of AST.
AST and BRT during daylight saving time
- AST next changes on 14 Mar 2027: clocks go forward one hour at 01:59 local time, from AST (UTC−4) to ADT (UTC−3).
- BRT does not observe daylight saving time; it stays on UTC−3 all year.
Best time for a meeting between AST and BRT
AST and BRT share 7 hours of the 9 AM–5 PM working day. Any time between 9:00 AM and 4:00 PM AST lands between 10:00 AM and 5:00 PM BRT, inside working hours for both.
AST to BRT FAQ
What is the time difference between AST and BRT?
Right now BRT is 1 hour ahead of AST. The gap changes 3 times in 2026 because the two sides switch to daylight saving time on different dates.
What is 9 AM AST in BRT?
9:00 AM AST is 10:00 AM BRT.
What is 12 PM (noon) AST in BRT?
12:00 PM AST is 1:00 PM BRT.
Is BRT ahead of or behind AST?
BRT is 1 hour ahead of AST, so it is later in BRT than in AST.
Does AST change for daylight saving time?
Yes. AST next changes on 14 Mar 2027, when clocks go forward one hour from AST to ADT.
Does BRT change for daylight saving time?
No. BRT stays on the same offset all year, so conversions never shift for daylight saving time.
What is the best time for a meeting between AST and BRT?
AST and BRT share 7 hours of the 9 AM–5 PM working day. Any time between 9:00 AM and 4:00 PM AST lands between 10:00 AM and 5:00 PM BRT, inside working hours for both.
Related conversions
Convert BRT to AST
Convert AST to other time zones
Convert other time zones to BRT
Learn more
Updated 6 November 2026. Time zone data: IANA tz database.